home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Spec Disk 1998 Spring 4.0
/
Spec Disk 1998 Spring 4.0.iso
/
text
/
08211bue.txt
< prev
next >
Wrap
Text File
|
1998-06-22
|
69KB
|
1,470 lines
SECTION 08211
FLUSH WOOD DOORS
NOTE ** Buell Door Company, solid and hollow core, 5-ply
architectural wood veneer doors.
NOTE **
NOTE ** This section is based on the products of Buell Door
Company, which is located at:
NOTE ** 5200 East Grand Avenue
NOTE ** Dallas, TX 75223
NOTE ** Tel: (800) 556-0155
NOTE ** Tel: (214) 827-9260
NOTE ** Fax: (214) 826-9163
NOTE ** Email: Buell@ix.netcom.com
NOTE ** Website: www.buelldoor.com
NOTE ** Buell Door Company is one of the nation's largest
manufacturers with international distribution.
This section covers only a part of their product
line and stresses the inherently higher qualities
of 5-ply hot-press doors. For a thorough
discussion of 5-ply hot-press versus 7-ply cold
press doors, including manufacturing and
fabrication standards, pricing differences, bidding
considerations, and warranties, see the "NOTES TO
THE SPECIFIER" at the end of this section. Also
see the discussion there regarding stave core doors
versus SLC and particleboard core doors.
NOTE **
NOTE ** This section also includes statements for sound-
rated wood doors and can also be edited for lead-
lined or bullet-resistant wood doors. See Buell
Door Company's Section 08212 for stile and rail
wood doors and Section 08213 for high-pressure
decorative laminate veneer doors.
NOTE **
NOTE ** SECTION 08211 - FLUSH WOOD DOORS, Copyright 1998,
The Architect's Catalog, Inc.
PART 1 GENERAL
1.1 SECTION INCLUDES
NOTE ** Delete paragraphs and subparagraphs below not
applicable to project.
A. Solid flush wood doors:
1. Wood veneer facing material.
2. High-pressure decorative laminate veneer facing
material.
3. Hardboard facing material.
4. Fire rated.
5. Non-rated.
6. Flush design.
7. Glazed design.
8. Louvered.
9. Factory pre-fit.
10. Factory premachined.
11. Factory finished.
B. Hollow core flush wood doors:
1. Wood veneer facing material.
2. Hardboard facing material.
3. Factory pre-fit.
4. Factory premachined.
5. Factory finished.
1.2 RELATED SECTIONS
NOTE ** Delete sections below not relevant to this project;
add others as required.
A. Section 06400 - Wood door frames.
B. Section 08112 - Standard Steel Frames; Steel door frames.
C. Section 08212 - Aluminum Frames.
D. Section 08115 - Custom Steel Frames; Steel door frames.
E. Section 08213 - Stile and Rail Wood Doors.
F. Section 08712 - Door Hardware.
G. Section 08800 - Glass and Glazing.
H. Section 09900 - Painting and Site Finishing Doors.
I. Section _____ - _________________________.
1.3 REFERENCES
NOTE ** Delete references from the list below that are not
actually required by the text of the edited
section; add others as required.
A. AWI - Quality Standards of Architectural Woodwork
Institute, Seventh Edition, Section 1300 and 1500.
B. NWWDA I.S.1.A - Architectural Wood Flush Doors of
National Wood Window and Door Association.
C. WIC Quality Standards of Woodwork Institute of
California.
D. NFPA 80 - Fire Doors and Windows, 1995 Publication.
E. NFPA 101 - Life Safety Codes.
F. NFPA 252 - Standard Method of Fire Test for Door
Assemblies.
G. UL-10B - Fire Test of Door Assemblies.
H. ASTM D 5456 - Specification for Evaluation of Structural
Composite Lumber Products.
I. ASTM E 152 - Methods of fire test for door assemblies.
J. ASTM E 90 - Test Method for Laboratory Measurement of
Airborne Sound Transmission Loss of Building Partitions.
K. ASTM E 413 - Classification for Rating Sound Insulation.
L. ASTM F 476 - Test Methods for Security of Swinging Door
Assemblies.
M. ANSI/AHA A135.4 - Basic Hardboard.
N. ANSI A208.1 - Particleboard, Mat-Formed Board.
O. ANSI/HPVA HP-1 - Hardboard and Decorative Plywood.
P. NEMA LD-3 - High Pressure Decorative Laminates.
Q. Intertek Testing Services/Warnock-Hersey International -
Certification Listings for fire doors.
R. ADA - Americans with Disability Act.
S. _______________________________________.
1.4 SUBMITTALS
A. Submit each item in this article according to the
conditions of the Contract and under provisions of
Section 01300.
B. Product Data: Manufacturer's technical data for each
type of door, including details of core and edge
construction, trim for openings and louvers, factory
finishing specifications, and warranty.
C. Shop Drawings: Prepared specifically for this project
indicating location and size of each door, veneer
species, type and characteristics, elevation of each kind
of door, details of construction, location and extent of
hardware blocking, fire ratings, requirements for factory
finishing, requirements for glass and glazing, and other
pertinent data.
1. For factory-premachined doors, indicate dimensions
and locations of cutouts for locksets and other
cutouts adjacent to lite and louver openings.
2. Use same reference numbers for openings and details
as contract drawings.
NOTE ** Delete the following paragraph if samples are not
required.
D. Samples:
1. When factory finished, provide manufacturer's
standard of color charts, followed by two plywood
physical samples, 8-1/2 by 11 inches (215 by 280 mm)
in size, illustrating wood grain, stain, color,
range, and sheen for Architect's approval.
2. Architect has the option to furnish a color for the
manufacturer to match.
3. For decorative laminate doors, each color, finish,
and pattern are required.
4. As an option, submit construction corner samples cut
away to show stile, rails, crossbanding, core, and
face veneer. Samples 6 by 6 inches (150 by 150 mm)
or larger.
5. Metal Louvers: Blade and frame 6 inch (150 mm)
lengths for each material and finish required.
6. Frames for Lite Openings: Lite frame 6 inches (150
mm) in length for each material, type, and finish
required.
7. Manufacturer's Instructions: Submit instructions
regarding care of door during shipping, unloading,
storage, and preparation for hanging.
E. Test Reports:
1. Submit certification letters of the following
laboratory test results:
a. Stile edge screw withdrawals test and stile edge
split resistance tests for fire-rated doors.
b. STC ratings for each class specified.
F. Substitutions: Submit requests for substitutions in
exact accordance with Section 01600.
1.5 QUALITY ASSURANCE
A. Non-Fire Rated Wood Doors: Solid core premium grade or
custom grade architectural flush wood doors; comply with
the following:
1. AWI Quality Standard: "Architectural Woodwork
Quality Standards" including Section 1300
"Architectural Flush Doors," of Architectural
Woodwork Institute (AWI) for grade of door, core
construction finish, and other requirements exceeding
those of NWWDA quality standard.
2. NWWDA Quality Standard: ISI "Industry Standard for
Wood Flush Doors," of National Wood Window and Door
Association (NWWDA).
B. Fire Rated Wood Doors: Provide fire rated wood doors
which are identical in material and construction to units
tested in door and frame assemblies per ASTM E 152, and
which are labeled and listed for ratings indicated by
Intertek Testing Services/Warnock-Hersey, UL, or other
testing and inspection agency acceptable to the authority
having jurisdiction.
1. Oversize Fire Rated Wood Doors: For door assemblies
exceeding sizes of tested assemblies, provide
manufacturer's certificate stating that doors conform
to all standard construction requirements of tested
and labeled fire door assemblies except as to size.
2. Temperature Rise Rating: At stairwell enclosures,
provide doors that have a temperature rise rating of
250 degrees F (121 degrees C) maximum in 30 minutes
of fire enclosure.
3. Notify Architect, prior to fabrication, if fire doors
indicated cannot qualify for labeling because of
design, size, hardware, or other reason.
4. If material specified as fire rated and labeled can
be obtained from one source, no consideration will be
given to those manufacturers who are not authorized
to fabricate and label items.
5. Where fire rated classifications are shown or
scheduled for wood door assemblies, doors shall be
installed in compliance with the requirements of
"NFPA 80 Standard for Fire Doors and Windows."
Attach labels permanently at eye level to hinge
stile.
C. Single Source Responsibility: Provide wood doors for
Sections 08211, 08212, and 08213 from a single
manufacturer to ensure uniformity in quality of
appearance, face veneer, finish, and construction.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Handle doors at the site in accordance with AWI Section
1300-G-23 and Section G-20 "Care and Installation at
Jobsite" of NWWDA I.S.-1A, as well as with manufacturer's
instructions.
B. Delivery:
1. Do not deliver or install doors until conditions for
temperature and relative humidity have been
stabilized and will be maintained in storage and
installation areas during remainder of construction
period and after installation to comply with the
following requirements applicable to project's
geographical location:
a. Reference 7th Edition of AWI quality standard
including Section 100-S-11 "Relative Humidity and
Moisture Content."
2. Individually protect factory finished doors to
prevent damage.
3. Deliver no doors to the building until wet
construction operations are completed and dry, and
weatherproof storage space is available.
4. Accept doors on site in manufacturer's packaging.
Inspect for damage.
C. Storage:
1. Store doors in a clear dry ventilated space having
controlled temperature and relative humidity range
between 30 and 60 percent. Stack doors flat and off
the floor, supported to prevent warpage.
2. Avoid extreme heat, cold, dryness, or humidity by
storing doors in a closed-in building with
operational HVAC system.
3. Store flat over level surface above floor on wood
blocking.
D. Handling:
1. Do not walk on or place other materials on top of
stacked doors.
2. Handle doors with clean gloves. Lift or carry, do
not drag across one another.
3. Cover doors to keep clean and avoid discoloration
with an opaque covering which does not permit light
to penetrate during storage or staging. Covering
must allow air circulation.
4. At time of installation the protective door wrapping
is to remain in place, for door protection, until all
work by other trades is completed and final
inspection is finished.
5. Identify each door with individual opening numbers
which correlate with designation system used on shop
drawings for door frames and hardware.
1.7 FIELD MEASUREMENTS
A. Verify that field measurements are as indicated on shop
drawings, prepared by the manufacturer before proceeding
with factory machining.
1.8 COORDINATION
A. Contractor shall be responsible for coordinating and
obtaining necessary information from Hardware and Frame
manufacturers to provide door supplier with approved
hardware and frame schedules with templates 60 days prior
to desired delivery date of doors.
1.9 WARRANTY
A. General Warranty: Door manufacturer's warranty specified
in this article shall not deprive the Owner of other
rights the Owner may have under other provisions of the
contract documents and shall be in addition to and run
concurrent with other warranties made by the Contractor
under requirements of the contract documents.
B. Warrant doors by the manufacturer to be free of
manufacturing defects as follows:
1. Interior Solid Core: Life of original installation.
2. Exterior Solid Core: Two years.
3. Interior Industrial Hollow Core: Two years.
C. Exceptions to details or fire rating as shown on plans
that may affect the door manufacturer's warranty, or
specific fire rating, shall be brought to the attention
of the Architect in writing at time of submission of shop
drawings.
D. Submit written warranty agreement signed by Manufacturer,
Installer, and Contractor agreeing to pay a reasonable
charge to repair or replace defective doors and rehang
with new doors provided the defect was not apparent prior
to installation and they do not conform to tolerance
limitations of referenced quality standards as follows:
warped (bow, cup, or twist) more than 1/4 inch (6.35 mm)
in a 42-by-84 inch (1067 by 2134 mm) section or show
telegraphing of core construction in face veneers
exceeding 0.01 inch in a 30 inch (0.25 mm in a 762 mm)
span.
E. Contractor's Responsibilities: Replace or refinish doors
where Contractor's work contributed to rejection or to
voiding of manufacturer's warranty.
PART 2 PRODUCTS
2.1 MANUFACTURERS
NOTE ** Delete one of the two paragraphs below. The first
is to specify Buell Door Company and those
manufacturing equal products, the second is to
specify Buell Door Company exclusively.
A. Acceptable Manufacturers: Products and materials of the
following listed manufacturers are acceptable only if
specific products and materials can evidence exact
compliance with requirements of Contract Documents and
these Specifications.
1. Buell Door Company
2. Algoma Hardwoods, Inc.
3. Eggers Industries, Architectural Door Division
4. Weyerhaeuser Company
B. Provide flush wood doors as manufactured by Buell Door
Company, 5200 East Grand Avenue, Dallas, TX 75223: ASD.
Tel: (800) 556-0155 or (214) 827-9260, Fax: (214) 826-
9163, Email: Buell@ix.netcom.com; Website:
www.buelldoor.com
C. Requests for substitutions will be considered in
accordance with provisions of Section 01600.
NOTE ** Delete paragraph above or below; coordinate with
Division 1 requirements.
D. Substitutions: Not permitted.
E. Provide all wood doors from a single manufacturer.
NOTE ** Delete "AND TRANSOM PANEL" in the Article title
below if transom panels are not required for the
project.
2.2 DOOR AND TRANSOM PANEL TYPES
A. Flush Interior Doors:
NOTE ** Select thickness, type, and other characteristics
from subparagraphs below. Delete those not
required for the project.
1. Thickness: 1-3/4 inches (44 mm).
2. Thickness: 2-1/4 inches (57 mm).
3. Type: Solid core.
4. Type: Hollow core.
5. Fire rated.
6. Acoustic rated.
7. Lead lined.
8. Bullet resistant construction.
NOTE ** Select thickness below as required, deleting
thickness not required for the project.
B. Flush Exterior Doors:
1. Thickness: 1-3/4 inches (44 mm).
2. Thickness: 2-1/4 inches (57 mm).
3. Type: Solid core.
NOTE ** Delete paragraph below if not required for the
project.
C. Transom Panels: Match face veneer with continuous match
and other door characteristics indicated.
NOTE ** Delete "AND TRANSOM PANEL" in the Article title
below if transom panels are not required for the
project.
2.3 DOOR AND TRANSOM PANEL CONSTRUCTION
NOTE ** Select construction(s) from paragraphs below.
Delete those not required for the project.
A. Core (solid, non-rated): AWI Section 1300-S-7, Type PC-5
bonded particleboard.
B. Core (solid, fire rated): AWI Section 1300-S-13, Type S
(FD 1 1/2, FD 1, FD 3/4, FD 1/2, FD 1/3).
C. Core (solid, acoustical): AWI Section 1300-S-13, Type
SR.
D. Core (solid, lead lined): AWI Section 1300-S-13, Type
LL.
E. Core (solid, electrostatic shielded): AWI Section 1300-S-
13, Type ES.
F. Core (hollow): AWI Section 1300-S-15, Type IHC
institutional.
2.4 FLUSH DOOR FACING
NOTE ** Select and edit one or more of the following
paragraphs as required for the project.
A. Interior Natural Wood Veneer Doors:
NOTE ** If pre-selection of a particular veneer flitch is
made, then designate "veneer to be furnished from
Veneer flitch approved by the Architect." Use
caution when specifying plain slice Natural Birch;
the term "natural" or "unselected" Birch means the
veneer may contain both the sapwood, or white
portion, as well as the heartwood, or dark portion,
of the tree in unrestricted amounts. The heartwood
of the birch tree varies in color from medium to
dark brown or reddish brown, while the sapwood
portion of the tree is near white. "Select White
Birch" should be specified if veneer is to be
uniform in color with no contrasting dark brown
portion in unrestricted amounts.
1. Veneer Cut and Specie: ____________________.
2. Veneer Thickness and Grade: 1/40 inch (0.64 mm)
before sanding minimum with quality characteristics
of AWI Section 1300 and 200-S-9 Panel Products "A"
Grade veneer face with edge glued joints.
3. Veneer Leaf Match: Book match grain.
4. Veneer Face Match: Running match.
5. Transoms: Continuous matched.
6. Pairs and Sets: Provide pair matching and set
matching for pairs of doors and for doors hung in
adjacent sets.
7. Door Thickness: 1-3/4 inches (44 mm).
B. Interior Hardwood Composite Veneer Doors:
NOTE ** For projects requiring door veneer faces that are
defect free (without small burls, occasional pin
knots, worm holes, color streaks, or spots that are
natural characteristics of some veneer species),
hardware composite veneer should be specified.
They are produced by converting bland African wood
into a custom-patterned veneer through a dye and
mold system which allows for the production of a
wide range of conventional veneers that are
unparalleled for consistency in grain and color.
Veneer species are available in unlimited quantity
for add-ons to existing installations. The
industry leader is Brookside Veneers, Ltd.; 1-800-
887-5878.
1. Face Veneer: Brookline hardwood composite veneer no.
_____.
a. Specie: _______________________________.
2. Veneer Thickness: 1/42 inch (0.60 mm) before
sanding.
3. Veneer Leaf Match: Slip match.
4. Veneer Face Match: Running match.
5. Transoms: Continuous matched.
6. Pairs and Sets: Provide pair matching and set
matching for pairs of doors and for doors hung in
adjacent sets.
7. Door Thickness: 1-3/4 inches (44 mm).
NOTE ** A description of the sketch face and the
manufacturer should be specified (e.g., Sapele
Pommele, Birdseye Maple, etc./Herring Bone, Reverse
diamond, sunburst, box sketch, simulated Stile and
Rail of WD-1 with herring bone insert panels of WD-
3, produced by, e.g., Architectural Forest
Products; Two Rivers, WI 54241).
NOTE **
NOTE ** Sketch face veneers are often used where aesthetic
appearance of door faces impacts design effect of
an area, such as the lobby, entrance to the board
room, executive offices, etc. Many interesting
exotics are commercially available as veneer and
can be an economical way to "jazz up" a project.
Sketch face design is the responsibility of the
designer and should be illustrated in the door
elevations of the project plans. Buell Door
Company will provide guidance for sketch match face
designs.
C. Exotic Veneer/Sketch Face Match: Fabricate sketch face
doors with sketch face veneers that comply with the
designer's dimensioned door elevations detailed in the
project plans, showing veneer component species, grain
direction, and finish.
NOTE ** Polyvinyl chloride thermoplastic sheet veneer is
specified extensively in hospitals, nursing homes,
clinics, schools, airports, etc., as a protective
surfacing material for interior walls and kick
plates on doors. Polyvinyl chloride thermoplastic
sheet offers more resistance to impact, chemicals,
and general abuse than high pressure laminates.
Specify polyvinyl chloride thermoplastic door
facings in high traffic areas to minimize damage to
door surface and edges.
NOTE **
NOTE ** The leading manufacturer is IPC Door and Wall
Protection Systems, Muskogee, WI (1-800-222-5556).
NOTE **
NOTE ** High-impact polyvinyl chloride thermoplastic as
specified in the following paragraph, should not be
used to face exterior doors.
D. High-Impact Polyvinyl Chloride Thermoplastic Veneer
Doors:
1. Type: Rigid high-impact polyvinyl chloride
thermoplastic sheet veneer.
NOTE ** Insert name of veneer manufacturer in the
subparagraph below.
a. Manufacturer: _________________________.
NOTE ** Select veneer thickness from the two paragraphs
below.
2. Thickness: 0.040 inches (1.02 mm).
3. Thickness: 0.060 inches (1.52 mm).
NOTE ** Select color number and name standard colors.
Custom colors are available with a minimum purchase
requirement.
4. Color No. and Name: ______________________________.
NOTE ** Select surface finish from the two paragraphs
below. Textures other than standard textures are
available with a minimum purchase requirement.
5. Surface Finish: Standard texture.
6. Surface Finish: ______________________________.
7. Edge Trim: Bevel both edges of door 1/8 inch in 2
inches (3.1 mm in 51 mm) and laminate (clad) edges
with same PVC material as the face, using hot-melt
glue that is cured under heat and pressure for
permanent adhesion.
8. Door Thickness: 1-3/4 inches (44 mm).
E. Interior Painted Finish Doors:
1. Hardboard: ANSI/AHA A135.4, Class 1 - tempered, type
SIS hardboard 1/8 inch (3 mm) thick, for paint
finish.
2. MDO: Medium Density Overlay non-directional, 0.015
inch (0.38 mm) face veneer over standard hardwood
crossband, AWI Grade 1. International Paper
"Uniwood" product 10306 Luxcell face is acceptable
for interior application.
3. Close Grain Hardwood Veneer: Minimum B or sound
grade, 1/50 inch (0.51 mm) thickness at 12 percent
moisture content.
NOTE ** An example of specie and veneer cut in the
following subparagraphs would be "Paint Grade
Birch, Rotary cut."
a. Specie: _______________________________.
b. Veneer Cut: _______________________________.
4. Door Thickness: 1-3/4 inches (44 mm).
NOTE ** Exterior wood veneer doors in the article below are
the same as specified under Interior Wood Doors.
High pressure decorative laminate veneer should not
be used to face exterior doors. To maintain
warranty, comply with finishing and other
protective measures specified in Part 3 -
EXECUTION.
F. Exterior Wood Veneer Doors:
2.5 FABRICATION
NOTE ** Select and edit the following items to suit project
requirements.
NOTE **
NOTE ** The 'building standard' doors are usually more
accurately specified as AWI Custom Grade, the
highest grade used most of the time, which is
suitable for most projects. AWI Premium Grade
doors are specified when the highest degree of
control over the quality of materials specified is
required, often in conjunction with architectural
panels and other related doors. The AWI Custom
Grade allows 'A' grade veneer faces and running
match, while Premium Grade requires 'AA' grade
veneer faces and balance match.
A. Grade: Custom.
B. Grade: Premium.
C. Construction: AWI 1300; PC-5, for Wood Veneer Doors.
D. Non-Rated and 20 Minutes Fire-Rated Doors:
1. Core: Mat Formed Wood Particle Board, Grade 1-L-2;
28-32 pcf (0.448 to 0.513 g/cc) density meeting
requirements of ANSI A208.1.
2. Bonding: Stiles and rails bonded to core using Type
I glue and sanded as a unit prior to applying
veneers. Drop in core is not acceptable.
3. Crossbands: Dried to 6-9 percent moisture content,
minimum 1/16 inch (1.58 mm) thick spliced hardwood
with no voids or defects, extending full width of
doors with grain at right angles to face veneer.
4. Stiles: 1-1/2 inch (38 mm) deep before fitting. 1-
1/8 inch (28.5 mm) minimum after trimming, 2 ply
construction without fingerjoints, consisting of 1/2
inch (12.7 mm) thick outerband specie matching or
compatible with face veneer and 1 inch (25.4 mm)
thick innerband of TimberStrand Laminated Strand
Lumber (LSL) by Trus Joist MacMillan or hardwood at
mill option. The vertical edges on particleboard
core doors will require a minimum testing rating as
follows:
a. 525 pounds (2.335 kN) per the NWWDA TM-5 "Split
Resistance."
b. 930 pounds (4.137 kN) per the NWWDA TM-8 "Hinge
Loading Resistance."
c. 1,000 pounds (4.448 kN) per the NWWDA TM-10
"Screw Holding Capacity" test reports.
5. Rails: 1-1/8 inch (28.5 mm) after trimming;
Laminated Strand Lumber (LSL) by Trus Joist MacMillan
or hardwood at mill option.
6. Pairs: Use ITS/Warnock-Hersey or UL 20 minute
labeled pairs with fire retardant stiles without
steel channels covering meeting edges on a pair
measuring 4 feet by 10 feet (1.219 by 3.048 m)
maximum each leaf.
E. Fire Rated, 45, 60, and 90 Minute Doors: AWI 1300-S-4-
13. Comply with requirements of Paragraph 1.02 and the
following minimum requirements. Test labeled doors in
conformance with UL or ITS/Warnock-Hersey International,
NFPA 252, and ASTM E 152.
1. Core: Door manufacturer's standard non combustible
mineral core; incombustible, asbestos-free mineral
composition, engineered to meet labeling
requirements.
2. Stiles and Rails: Manufacturer's standard sizes to
meet fire rating, bonded to the core, complying with
the following:
a. Stile Edge Screw Withdrawals: Minimum 740 pounds
(3.292 kN) when tested in accordance with ASTM D
1037.
b. Stile Edge Split Resistance: Minimum 750 pounds
(3.336 kN) when tested in accordance with ASTM D
143 (modified); vertical edge solid, laminated,
or veneered of same species as visible surface.
Reinforce hinge edge on all fire doors to
accommodate full mortise hinges and to provide
additional screw holding power when hinge is
installed, unless specified otherwise.
3. Crossbands: Dried to 6-9 percent moisture content,
minimum 1/16 inch (1.58 mm) thick spliced hardwood
with no voids or defects, extending full width of
doors with grain at right angles to face veneer.
4. Blocking: No through-bolting is allowed for
attaching finished hardware. Refer to Section 08700
for hardware requirements. Provide composite
blocking designed to maintain fire resistance of door
but with improved screw-holding capacity "as required
by specified hardware" with one or all of the
following options:
a. 5 inch (127 mm) top rail blocking to accommodate
surface mounted closer attached with wood screws.
b. 5 inch (127 mm) bottom rail blocking to
accommodate hardware attachment not unlimited
undercutting.
c. 5 inch by 18 inch (127 by 457 mm) lockblocks for
locksets and exit devices.
d. Blocking for flushbolts and vertical rod exit
devices.
NOTE ** In the following paragraph, caution should be used
when specifying concealed vertical rod fire exit
devices on pairs of doors in high traffic areas in
buildings where doors are subject to abuse. When
doors are machined for this hardware, the mortise
cut-outs at the top and bottom latch area of the
door have a 3/32 inch (2.4 mm) face material
remaining. Subsequent breakage can occur which, if
not repairable, can lead to expensive replacement
of the doors.
NOTE **
NOTE ** There is one exception. This is not a concern when
specifying the Adams Rite 3900 Series because the
mortise cutout in the top of the door for the top
rod only exit device is only 1/4 inch diameter.
Thus the door strength is not affected and would
have the same strength as a door with surface-
applied vertical exit device rods.
5. Pairs: Provide 20, 45, 60, and 90 minute single
swing or double egress fire rated doors "as required
by specified hardware." Where exit devices are
required, comply with one or more of the following:
a. Non-Rated and 20 Minute Fire Rated Doors:
1) Single Swing or Double Egress doors up to 8
feet by 10 feet (2.438 by 3.048 m) opening
size, manufacture doors to receive:
a) Surface-applied vertical rod fire exit
devices; no metal edges or astragals
required.
b) Concealed vertical rod exit devices
require 5 inch (127 mm) Georgia-Pacific
Firestop or approved equal, with Natural
matching full length wood edge meeting
stiles, no finger joints, 1/2 inch (12.7
mm) maximum width of wood after trim, no
metal edges or astragals required.
c) Surface-applied top vertical rod only
exit devices: Adams Rite Mfg. or
approved equal; no metal edges or
astragals required.
d) Concealed top vertical rod only exit
devices: Adams Rite Mfg. or approved
equal; no metal edges or astragals
required; maximum size 8 feet by 8 feet.
b. 45,60,and 90 Minute Fire Rated Doors:
1) Single Swing or Double Egress doors up to 8
feet by 8 feet (2.438 by 2.438 m) opening
size:
a) Manufacture doors to receive surface
applied vertical rod fire exit devices
with Georgia-Pacific fire door components
or approved equal, having Natural
matching wood edge meeting stiles, 2 ply
construction consisting of an innerband
of fire retardant composition material of
Georgia-Pacific Firestop or approved
equal, outerband natural hardwood
matching or compatible to face veneer.
b) Double egress requires through-bolting or
"sex" bolts at latching points; surface
top rod only devices must be through-
bolted (sex bolts). Metal edges and
overlapping astragals are available, but
not required.
NOTE ** For 20-minute fire-rated door pairs with concealed
vertical rod exit devices, no thermal pins or
strikes should be used. On 45- or 60-minute fire-
rated door pairs with concealed vertical rod exit
devices, the pins are located horizontally and no
floor strikes are required. For 90-minute door
pairs only, the Adams Rite system requires a steel
strike plate for each door, located in the floor
and measuring 3/8 inch (9.5 mm) in diameter and 1/2
inch (12.7 mm) deep, for thermally activated pins
of 3/8 inch (9.5 mm) diameter located in the bottom
of the door rail. The pin is not visible once
installed when in the bottom of the door.
NOTE **
NOTE ** This hardware must be supplied by the door
manufacturer with the Adams Rite Mfg. concealed or
surface mounted top rod only design or approved
equal.
2) Single Swing or Double Egress doors up to 8
feet by 8 feet (2.438 by 2.438 m) opening
size:
a) Concealed top vertical rod only exit
devices: Adams Rite Mfg. or approved
equal.
b) Natural matching wood edge meeting
stiles, Georgia-Pacific Firestop II
System or approved equal.
NOTE ** The following are options; delete those not
required for project.
c) 48 inch (1.219 m) protection plate of
metal, stainless steel, or IPC high-
impact PVC.
d) Metal hinge protectors.
3) Single Swing up to 8 feet by 9 feet (2.438 by
2.743 m) opening size:
a) 5 inch (127 mm) metal U channel on lock
stiles, primed or veneer wrapped with
natural wood. Channel may not be
mortised. Von Duprin or approved equal.
b) 5 inch (127 mm) wide edge meeting stiles,
Georgia-Pacific Firestop or approved
equal.
6. 45 Minute Full Lite Door Pairs up to 8 feet by 9 feet
(2.438 by 2.743 m) opening size: Manufacture using
Georgia-Pacific fire door components or approved
equal, with 3/4 inch (19 mm) transparent composite
light panel manufactured by SuperLite Panel II - 45
as distributed by O'Keefe's Inc., maximum clear view
area of 2,638 sq. in. (1.701 sq. m) per leaf.
F. Security Rating: ASTM F 476, Grade 40.
G. Individually polybag all doors.
NOTE ** Utilize the following paragraphs when required by
the project.
H. Door and Transom Combination:
1. Wood Grain Patterns: Continuous veneer match as per
NWWDA I.S.-1 Standards.
2. Top Rail of Door and Bottom Rail of Transom: Full
width; matching species lumber or veneered with same
face veneer species.
I. Acoustically Rated Construction: AWI 1300 G-10-SR.
1. Core: Manufacturer's standard sound dampened core
construction to achieve a sound transmission class
rating of not less than 41 for a door thickness of 1-
3/4 inches (44 mm), certified by the manufacturer to
be based on tests conducted at an independent testing
agency in accordance with ASTM E 90 and E 413, as
operating units.
2. Vertical Stiles: Minimum 1-3/8 inch (34.9 mm)
minimum after trimming, 2 ply construction without
fingerjoints, consisting of 5/8 inch (15.8 mm) thick
mill option hardwood.
3. Bottom Rail: 2-1/8 inch (53.9 mm) minimum mill
option hardwood.
4. Top Rail: 1-3/8 inch (34.9 mm) minimum mill option
hardwood.
5. Crossbands: Full width of door with grain running
horizontally, tapeless sliced without voids.
6. Face Veneer: As specified, laminated to crossband
and edges.
7. Bonding:
a. Core to Stiles, Rails, and Blocking: Type I
adhesive; sand prior to assembly of face veneers.
b. Face Veneers and Crossband to Core and Edges:
Type I adhesive by hot press process.
8. Door equipped with concealed retracting bottom seal
and perimeter concealed door gasketing.
J. Lead Lined Construction: AWI 1300-S-3(LL).
1. Core: Manufacturer's standard construction; one
piece lead sheet or sheets extending to all four
edges; total door thickness 1-3/4 to 2-1/2 inches (44
to 63 mm).
2. Face Veneer: Same as non-lead lined doors.
3. Stile and Rails:
a. Vertical Edges: 1-1/8 inch (28.5 mm) minimum
hardwood; solid, laminated, or veneered same
species visible surface. No visible joints
permitted.
b. Top and Bottom Rails: 1-1/8 inch (28.5 mm)
minimum mill option hardwood.
c. Securely bond vertical edges and rails to core.
K. Stave Lumber Core Construction:
1. Core: Construct stave core using random length kiln
dried (6 to 9 percent moisture content) wood blocks
2. Stagger core and joints tightly in adjacent rows, all
blocks securely edge glued together under pressure.
NOTE ** To specify structural composite lumber (SCL) core
such as TimberStrand LSL core by Trus Joist
MacMillan, approved by the AWI and NWWDA
associations as a preferred substitute in lieu of
stave core, include the following.
L. Structural Composite Lumber Core Construction:
TimberStrand LSL by Trus Joist MacMillan.
1. Core: TimberStrand LSL or other structural composite
lumber (SCL) in accordance with ASTM D 5456; uniform
density of 38 pcf (0.61 g/cc), with minimum target
MOR at 6,000 psi/MOE 1.3 x 10^6 psi.
M. Institutional Hollow Core: Phenolic impregnated
honeycomb with two woven interlocking cells; two lock
blocks.
N. Bullet Resistant Wood Door Construction: Solid core
consisting of ArmorCore Bullet Resistant Fiberglass Armor
as shown in the drawings and manufactured by Waco
Composites, Inc., Waco, TX or ArmorTex Bullet Resistant
Fiberglass as manufactured by Safeguard Security, San
Antonio, TX; veneer or plastic laminate as selected.
NOTE ** Select protection level required for project from
subparagraphs below; delete those not required for
project.
1. Level I - Class 1, Medium power small arms NIJ HA-1/4
inch thick.
2. Level II - Class 2, High power small arms NIJ H-5/16
inch thick.
3. Level III - Class 3, Super power small arms NIJ IIIA-
7/16 inch thick.
O. Flush Doors with Flat Panels:
1. Grade: Premium.
2. Construction: 5 ply, 20 minute rated.
3. Core: Solid particleboard.
4. Panel: 7/8 inch (22.2 mm) medium density fiber board
laminated with 7/16 inch (11.1 mm) molding on each
side.
P. Flush Doors with Face Reveals:
1. Fabricate with identical reveals measuring up to 1/4
inch (6.3 mm) in width and maximum 3/64 inch (1.2 mm)
in depth on both sides of the door.
2. Comply with designer's dimensioned door elevations
detailed in project plans.
3. Approved by door manufacturer's Fire Door labeling
authority.
4. In no case shall the area grooved exceed 3 percent of
the area of the face.
2.6 FABRICATION TOLERANCES
A. Size:
1. Thickness: Plus or minus 1/16 inch (1.6 mm).
2. Height: Plus or minus 1/16 inch (1.6 mm).
3. Width: Plus or minus 1/32 inch (0.8 mm).
B. Squareness: Diagonal measures not to exceed 1/16 inch
(1.6 mm).
C. Hardware Location: Plus or minus 1/32 inch (0.8 mm).
2.7 ADHESIVE
A. Facing Adhesive: Type I - waterproof.
2.8 ACCESSORIES
A. Lite and Louver Details:
1. Field glaze all lite openings.
2. Install lite openings for non-rated wood doors with
manufacturer's standard wood beads. Cut lite
openings and install wood beads permanently on one
side, tacked loose on other side.
3. Furnish lite openings for fire doors with either
flush wood veneered lite bead or primed metal vision
panels (veneered covered metal vision panels
optional) as per the manufacturer's approvals. Flush
wood veneered lite beads or metal vision panels shall
be approved by Intertek Testing Services/Warnock-
Hersey International for use in 20, 45, 60, and 90
minute doors.
4. Glazing Stops:
NOTE ** Insert wood species below to be same as door
facing. Select channel shape, type of corners, and
tamper proof screws as required for project.
a. Wood Species: ________________________, with
metal clips for rated doors.
b. Channel Shape: Roll steel.
c. Channel Shape: Aluminum.
d. Corners: Mitered.
e. Corners: Butted.
f. Prepare for countersink style screws.
g. Prepare for countersink style tamperproof screws.
NOTE ** Wood louver are manufactured by wood door
manufacturers. Metal louvers are not. Metal
louvers can be specified in this section or
elsewhere. Coordinate with door schedule.
5. Wood Louvers: Manufacturer's standard construction.
a. Same species lumber as face veneer.
b. Factory installed using manufacturer's standard
method.
NOTE ** Select type of slat from subparagraphs below.
c. Slat Type: Single slat.
d. Slat Type: V-slat chevron.
NOTE ** Specify manufacturer and model number below if
metal door louvers are required for the project.
6. Metal Louvers: _________________________________.
7. To maintain warranty, do not cut light exceeding
maximum 40 percent of height and 5-1/2 inches (140
mm) from door edge and face hole prep-of lock set.
B. Applied Molding:
1. Species: Matching or compatible with face veneer.
2. Selected from manufacturer's standard profiles
approved by Architect.
3. Apply molding to door face with finishing nails;
putty holes so they are not visible.
2.9 PREFIT AND PREMACHINE
A. Prefit doors at the factory with the following
clearances:
1. 1/8 inch (3.1 mm) on top and hinge edges.
2. 1/8 inch (3.1 mm) on lock edge of single doors
3. 1/16 inch (1.6 mm) per leaf on pair meeting edges.
4. Bevel both edges of door 1/8 inch in 2 inches (3.1 mm
in 51 mm).
5. Bottom: 1/4 inch (6.3 mm) above floor or threshold,
except where undercutting is indicated. Specific
bottom clearance is shown on door schedule.
B. Premachine doors for finish hardware.
1. Furnish wood door manufacturer an approved frame
schedule (including all hardware locations), approved
hardware schedule (including all necessary hardware
templates), and an approved door schedule.
2. In lieu of these three schedules, furnish door
manufacturer one coordinated schedule showing all
data relative to frame, hardware, and door
information.
C. Make cutouts for glazing at the factory. Allow 5-1/2
inches (140 mm) minimum from cutout to mortised hardware
items.
D. Contractor is responsible for boring pilot holes, wood
screw holes, mounting holes for face plates, and other
surface applied hardware listed on the hardware schedule,
unless special arrangements are made with the door
manufacturer prior to submittal of shop drawings to the
Architect.
E. Kickplates, push plates, stretcher plates, edge guards,
and other protective hardware shall be furnished by the
hardware supplier or Contractor and installed in the
field.
2.10 PREFINISHING
NOTE ** Select type of finish to comply with project
requirements.
A. General: Comply with referenced quality standards
requirements for factory finishing.
B. Transparent Finish: Comply with requirements indicated
for grade, finish system, staining effect, and sheen:
1. Grade: Custom.
2. Finish: Manufacturer's standard finish with
performance requirements comparable to AWI System TR6
catalyzed polyurethane.
3. Staining: Match approved sample for color.
4. Effect: Open-grain finish.
5. Sheen: Semigloss, 60 percent.
NOTE ** The following subparagraph is an optional method of
specifying a transparent finish; if used, delete
the subparagraphs above.
6. Match Buell Door Co. Finish Sample No. __________.
C. Opaque Finish: Comply with requirements indicated for
grade, finish system, color, and sheen:
1. Grade: Custom.
2. Finish: Manufacturer's standard finish with
performance requirements comparable to AWI System OP-
6 catalyzed polyurethane.
3. Color: Match approved sample for color selected from
manufacturer's standard colors.
4. Sheen: Semigloss, 60 percent.
PART 3 EXECUTION
3.1 EXAMINATION
A. Examine doors and door frames to verify that frames have
been installed as required for proper hanging and
operation of doors.
1. Frames must comply with indicated requirements for
door type, size, location, and swing characteristics,
and have been installed with plumb jambs and level
heads.
2. Doors with apparent defects should not be hung.
3. Notify the Architect in writing of conditions
detrimental to proper installation and operation of
wood doors.
4. Do not proceed with installation until unsatisfactory
conditions have been corrected.
5. Proceeding with installation shall be considered as
acceptance of door and frame conditions.
3.2 INSTALLATION
A. Field Finishing: Place door in a horizontal position,
thoroughly sand all surfaces with hand block and 150-180
grit sand paper to remove handling marks and raised grain
to prevent blotchy appearance. Seal top and bottom
rails.
B. Adjusting and Cleaning: Doors shall swing in their
respective frames free of hinge binding or improper
latching.
1. Trim non-rated door width by cutting equally on both
jamb edges. Trim height by cutting bottom edges to a
maximum of 3/4 inch (19 mm).
2. Trim fire rated door height at bottom edge and in
accordance with fire rating requirements.
3. Rehang or replace doors which do not operate freely
as directed by the Architect.
4. Seal cut surfaces after fitting and machining.
5. Leave protective door wrappings in place until all
work by other trades is complete and final inspection
is finished.
6. Furnish Owner with instructions on cleaning and
maintaining doors.
C. Exterior Doors:
1. Provide aluminum flashings full thickness and width
of doors.
a. Top rail.
b. Bottom rail.
c. Sill of glazed openings.
2. Apply three coats of marine finish such as Bruning
Paint Super Marine Spar Varnish 508-14, a phenolic
alkyd resin varnish.
3. Protect door with canopy.
4. Failure to provide these measures can void
manufacturer's warranty.
D. Hardware: For installation, see Section 08710.
3.3 INSTALLATION TOLERANCES
A. Conform to AWI for requirements for fit and clearance
tolerances.
3.4 ADJUSTING
A. Adjust work under provisions of Section 01700.
B. Adjust doors for smooth and balanced door movement.
3.5 FIELD QUALITY CONTROL
A. Architect may require one randomly selected door to be
used for testing for Contract Document compliance. Test
will consist of cutting door up to expose blocking,
stiles and rails, core bonding, and veneer cross-section.
B. Tests may also be conducted for quality and type of
factory finishing.
C. If tested samples show non-compliance with Contract
Document requirements, all doors provided under this
Section shall be replaced at no addition to Contract Sum
or extension of Contract time.
NOTE ** Provide schedule below when door and frame
schedules are not described on drawings. The
schedule should identify various types or
categories of doors and associated frames, fire
ratings if any, hardware sets, etc.
3.6 SCHEDULE
NOTE ** NOTES TO THE SPECIFIER:
NOTE **
NOTE ** This specification for flush wood doors has been
prepared for use by architects specializing in the
commercial and institutional markets. It depicts 5-
ply architectural wood veneer doors and 3-ply high-
pressure decorative laminate doors and is in strict
compliance with AWI Quality Control Standards, 7th
Edition.
NOTE **
NOTE ** Buell Door Company, AWI members, and the other
manufacturers listed, recognize the superiority of
5-ply doors from a quality control, aesthetic, and
functional point of view. Manufacturers offering 5-
ply doors provide the highest degree of technical
expertise, premachining, prefinishing, and
coordination; they are, in general, qualified to
handle architectural grade projects.
NOTE ** Buell Door Company and many of the other
architectural manufacturers acknowledge that a
large percentage of the marketplace, whether due to
budget or other considerations, may allow approval
of 7-ply door manufacturers in their wood door
specifications. Because there are wide variations
in 7-ply door construction, the specifier is
cautioned to insist that all approved manufacturers
comply with the performance requirements of these
specifications as they relate to product material
and fabrication methods. When this is done, it
minimizes the chances of inferior quality doors
being supplied on a project which do not comply
with the intended performance standards and
aesthetic requirements. By maintaining important
performance parts of the specification, the
specifier can be assured that suppliers will be
bidding doors of equal quality level.
NOTE ** Why specify only 5-ply, hot press construction?
Because in the bidding process, when 5-ply and 7-
ply manufacturers are both approved, the door
distributors will only bid the lowest quality 7-ply
door possible. Door pricing, not door quality,
becomes the primary consideration. Subsequently,
the lowest grade of commodity 7-ply doors get
furnished while the better quality 5-ply
architectural grade door is never seriously
considered.
NOTE **
NOTE ** Because of a significant price spread between 5-ply
and 7-ply doors, no distributor will risk losing a
job by bidding the 5-ply door. This price
differential will always exist because there are
real cost differences in the quality of material
and manufacturing processes of the two door types.
NOTE ** Consequently, to protect market share, some 5-ply
door manufacturers also produce a lower quality 7-
ply door that may have an imported 3 ply door skin
made in Asia with a thin 1/100 inch veneer face,
priced lower to distributors. This enables them to
compete in the market with doors manufactured by
commodity 7-ply manufacturers. When 5-ply and 7-
ply manufacturers are both specified, it is the 5-
ply manufacturer's 7-ply lower quality door that
will be bid and furnished. Chances of 5-ply
architectural grade doors being furnished are
negligible.
NOTE **
NOTE ** If assurance of door quality is important, the
specification should allow for only 5-ply hot press
construction. Once doors are installed, it not
easy to reject poor quality doors, due to delays in
building completion and occupancy.
NOTE ** How do 5-ply and 7-ply manufacturers differ in
manufacturing methods and door component parts?
First, all reputable 5-ply door manufacturers
conform to the same specifications regarding
hardwood rails and stiles, bonded-to-the-core
construction, hot-press lamination, tight exterior
veneer tolerances, and other quality-driven
parameters.
NOTE **
NOTE ** Second, unlike 5-ply doors, there are wide
variances in 7-ply door construction. Some use
softwood finger-jointed rails and stiles, others
use hardwood. Skin thicknesses and glue grades
vary. Some 7-ply doors have drop-in cores, while
others are bonded-to-the-core. Other differences
abound.
NOTE ** Third, 5-ply manufacturers are more custom-driven
versus some 7-ply manufacturers who are volume-
driven, importing most of their skins from the
Orient. So, while both 5-ply and 7-ply doors can
be constructed from most any species of wood, a 7-
ply door in a non-standard wood species will
require a much longer lead time.
NOTE **
NOTE ** Fourth, since 5-ply are usually custom-built, there
is greater flexibility in making or matching veneer
patterns. Even door edges can be species-matched
to the door face if requested. Conversely, 7-ply
manufacturers purchase veneers already assembled to
the underlying crossband layers, so grain-matching
can be limited. Some 7-ply door manufacturers do
not provide pair matching for all their door sizes,
especially full height doors.
NOTE ** Why is surface veneer thickness important? A
thicker surface veneer (typically 1/40 of an inch
compared to 1/100 of an inch on some 7-ply doors)
is especially important if the door is to "prepped"
or sanded in the field for finishing or repair. It
is very easy to sand through a thin exterior veneer
and expose the crossband, ruining the door. In
addition, thinner veneers often must be prepared
differently to avoid checking or splitting when
treated or finished.
NOTE **
NOTE ** With thicker veneers, however, these problems are
avoided. In addition, thicker veneers exhibit
greater grain depth and definition in the staining
and finishing process. In other words, for wood
doors, beauty does depend on how deep the skin
really is.
NOTE ** What about differences in fabrication? Exterior
skins for 5-ply doors are cut directly from the
tree and assembled, providing complete flexibility
in veneer cut and design. In contrast, because 7-
ply skins are so thin, they are first assembled to
the crossbands and shipped to the manufacturer as a
single piece, thereby reducing or eliminating
veneer design flexibility.
NOTE **
NOTE ** Also, 5-ply door manufacturers normally manufacture
every component of the door, giving them complete
control over quality and manufacturing tolerances.
On the other hand, 7-ply door manufacturers
typically assemble purchased door parts, limiting
manufacturing precision as well as flexibility.
NOTE ** How does laminated strength compare? The layers of
5-ply doors are hot-press bonded to cores that have
been banded with and glued to hardwood rails and
stiles, whereas 7-ply doors are cold-press bonded
at a significantly lower pressure. Higher pressure
plus heat during the bonding process greatly
reduces the chance of delamination. As proof,
consider that most 5-ply doors are backed with a
lifetime warranty; some 7-ply doors come with a
limited 5-year warranty with surcharges to upgrade
to a lifetime warranty with no change in
construction methods or material.
NOTE ** What does "bonded-to-the-core" mean and is it
important? Bonded-to-the-core means that the door
rails and stiles are glued or bonded to the door
core before the crossband and surface veneers are
added. Doors constructed this way are stronger and
more rigid than with other techniques, increasing
the useful life of the door.
NOTE **
NOTE ** Bonding to the core also enables the manufacturer
to sand all the parts together as a unit, reducing
problems such as "telegraphing" (a frame-joint
offset that shows on the surface of the door after
assembly). Virtually all 5-ply doors are bonded-to-
the-core; many 7-ply doors are not.
NOTE **
NOTE ** Results of hinge loading resistance tests
illustrate that average loading resistance of doors
with stiles bonded-to-the-core is higher than doors
with non-bonded wood door stiles.
NOTE ** Do all door manufacturers have the same finishing
capabilities? As for color matching, that depends
on the manufacturer. For instance, 5-ply
manufacturers can mix up virtually any color and
custom match it to an architectural control sample.
Some 7-ply manufacturers, however, are limited in
that they offer only a normal "standard grade" of
finish consisting of their standard colors,
topcoats, and finishing techniques. They may not
be able to offer a "select" grade of finishing that
permits color selection special sheens other than
their standards. Also, they are not likely to
offer "super grade" of finishes requiring high
aesthetic characteristics such as bleached
finishes, filled finish special sheens other than
their standards, and special effects such as
glazing, toning, and shading.
NOTE **
NOTE ** Use caution when specifying 7-ply manufacturers
since listing a manufacturer deems the
manufacturer's standard finish as acceptable.
NOTE ** What type of warranty is available? In specifying
a 5-ply solid core wood door, expect and accept no
less than a Full, Unlimited Lifetime Warranty.
This means the following:
NOTE **
NOTE ** 1. Duration of implied warranties may not be
limited. Warranty service must be provided to
anyone who owns the product during its useful life,
subsequent buyers notwithstanding.
NOTE ** 2. Warranty service must be free of charge,
including reasonable cost of removing, returning,
and reinstalling the product.
NOTE ** 3. At the consumer's choice, a replacement or
full refund will be provided if, after a reasonable
number of attempts, the problem is not corrected.
NOTE ** 4. The consumer is not required to perform any
unreasonable duty in order to receive service,
other than notifying the manufacturer that service
is needed.
NOTE **
NOTE ** With some 7-ply door manufacturers, expect only a
Limited 1- to 5-Year Warranty with an optional
"lifetime" warranty for a higher price but with no
change in door construction.
NOTE ** What about stave core doors? Stave core doors are
inferior to either structural composite lumber
(SCL) such as TimberStrand LSL core doors by Trus
Joist MacMillan, or particleboard core doors, and
should be eliminated from door specifications for
the following reasons:
NOTE **
NOTE ** 1. In most cases, specs for stave core doors can
be attributed to either an older spec that has not
been updated or the owner/architect's
misinformation regarding the many advantages of
specifying a different alternative core when there
is no obvious benefit to be gained by using stave
core.
NOTE ** 2. There is a very limited supply of good quality
stave core with proper moisture content. Some
regions utilize softwood species, such as pine,
while others utilize hardwoods like aspen and
basswood. In all cases, input materials are low
grade cutbacks from other processing steps. Most
stave core is made from the residue of wood
products manufactured for other purposes, such as
furniture. Consequently, it is subject to "peak
and valley" production. No manufacturer currently
makes stave core as a primary product. It is not
uncommon for an architectural door manufacturer to
be quoted a lead time of three months for a truck
load of stave core, with a cap on the amount he can
order during a given year.
NOTE ** 3. With stave core doors, the risk of defects on
door face veneers is significantly greater than
that of either particleboard or TimberStrand LSL
core doors. AWI points out that doors constructed
by using an alternative door core substrate have
greater dimensional stability.
NOTE ** 4. By using one of the alternative door core
substrates, the building owner can substantially
reduce maintenance costs because of door
replacements due to defects developing outside the
manufacturer's stipulated warranty -- defects due
to dimensional instability of the stave cores
exposed to extreme relative humidity.
NOTE ** 5. NWWDA tests show screw holding and hinge load
strength is more dependent upon the species and the
size of the wood stile, not of the core itself. If
necessary to meet hardware requirements, a
particleboard core door can be further strengthened
with blocking and extra wide top and bottom rails.
Structural composite lumber (SCL) core does not
require extra wide top and bottom rails.
NOTE ** 6. Security alone is not justification for
specifying stave core because it has no higher
security grade rating than particleboard core. Per
ASTM F 476, even particleboard core doors carry the
highest security rating, Grade 40. Door Impact
Tests conducted by Intertek Testing
Services/Warnock-Hersey International subject a
door to impacts at the center of a door using a 99
pound ram. Two impacts are performed for each
ascending grade from Grade 10 to Grade 40. Buell
Door Company's particleboard core doors qualify for
Grade 40 Security Rating and provide a substantial
material cost saving on the door price.
NOTE ** 7. Comparative substrate evaluations for
Architectural Flush Door Core applications have
shown structural composite lumber (SCL) such a
TimberStrand LSL by Trus Joist MacMillan is equal
to or better than stave core lumber in properties
relevant to the performance of a flush
architectural door. Therefore, it is warranted
that it be recognized as an appropriate alternative
core material for use in specifications that would
historically specify stave core doors as set forth
by the National Wood Window and Door Association in
I.S.1.A and the 7th edition of the AWI Quality
Standards, Section 1300.
NOTE ** Comparative tests have been done using two types of
stave core, softwood (pine) and hardwood (aspen),
along with TimberStrand LSL. Evaluations were made
for strength and stiffness, screw holding, split
resistance, and hinge holding. In all tests, the
TimberStrand LSL with a target density of 38 pcf
exceeded the performance level of traditionally
used stave core products. Although comparable to
stave lumber core in cost, TimberStrand LSL is
superior in strength and the dimensional stability
necessary to reduce telegraphing and warpage. For
more detailed information on test results, contact
Trus Joist MacMillan at 1-800-423-5808.
NOTE ** Eliminate stave core doors from your specs so the
owner, general contractor, and manufacturer can
jointly benefit by improved product quality and the
monetary advantage in utilizing particleboard or
structural composite lumber (SCL) core doors.
END OF SECTION