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| NATIONAL EVALUATION REPORT Copyright ©, 1998 National Evaluation Services, Inc. |
Report No. NER-472
Reissued October, 1998 |
STRUCLAM® LAMINATED VENEER LUMBER
WILLAMETTE INDUSTRIES, INC.
2550 PROGRESS WAY
WOODBURN, OREGON 97071
ADDITIONAL LISTING:
GEORGIA-PACIFIC CORPORATION
POST OFFICE BOX 105605
ATLANTA, GEORGIA 30348
1.0 SUBJECT
StrucLam® Laminated Veneer Lumber
2.0 PROPERTIES FOR WHICH EVALUATION IS SOUGHT
Structural Performance
3.0 DESCRIPTION AND USE
3.1 GENERAL
StrucLam by Willamette Industries, Inc., is a laminated
veneer lumber (LVL) designed for use as beams, joists, decking, rafters, truss chords and
wood I-joist flanges. G-P Lam® is StrucLam which is distributed by Georgia-Pacific Corporation.
G-P Lam has the same specifications and design properties, as StrucLam LVL.
StrucLam LVL is produced by laminating veneers of Douglas
fir-larch, Southern Pine, or a combination of Douglas fir-larch and Hemlock veneers which
comply with Willamette Industries. Inc., plant manufacturing standards and United States
Voluntary Product Standard. PS 1-95. StrucLam LVL produced with Southern Pine or a
combination of Douglas fir-larch and Hemlock veneers is limited to 1.8E, 1.9E and 2.0E
grades. Various quantities, grades and thicknesses of veneers are oriented with the grain
parallel to the length of the panel. Veneers are end-joined, as specified in the Manufacturing
Standard. Veneers are bonded with exterior-type adhesives which comply with ASTM D
2559. StrucLam LVL is available in 2.2E, 2.0E, 1.9E and 1.8E grades, and in thicknesses of
3/4 to 3-1/2 inches (19.1 to 89 mm), widths of 1-1/2 to 48 inches (38 to 1219 mm), and
lengths up to 80 feet (24 384 mm).
3.2 DESIGN AND ALLOWABLE STRESSES
3.2.1 General
Design provisions for StrucLam LVL not specifically covered
by this report are outside the scope of this report, and shall be determined by the
designer, subject to the approval of the Building Official, based on the principles set
forth for the design of wood construction in the applicable code and the American Forest
and Paper Association 1991 Edition of the National Design Specification for Wood
Construction (AFPA NDS-91), where applicable.
Allowable stresses provided in Table 1 of this report are
for StrucLam LVL under dry conditions of use as defined in Condition of Use 7.6 of this
report.
Allowable design capacities shall be adjusted for the
appropriate duration of load factor in accordance with the applicable code for solid sawn
lumber. Allowable shear, moment and stiffness (El) for 1-3/4-inch-thick 1.9E and 2.0E
Grade StrucLam are shown in Table 2 of this report. See Table 3 of this report for the
fastener schedule of headers and beams composed of 1-3/4-inch-wide StrucLam. See Table 4
of this report for bearing lengths of StrucLam beams. Allowable loads for common depths
and applications of 1-3/4-inch-thick 1.9E and 2.0E Grade StrucLam are shown in Tables 5
and 6 of this report.
3.2.2 Fasteners
The fastener values, resulting from the provisions provided
below, are permitted to be increased for duration of load in accordance with the
applicable code.
Allowable lateral and withdrawal nail values, used for
nails driven perpendicular to glue lines, shall be as provided for in the applicable code
for solid-sawn lumber with a specific gravity of 0.50. Lateral and withdrawal nail values
in the applicable code for species with a specific gravity of 0.46 shall be used for nails
driven parallel to glue lines.
Nails installed parallel to the glue lines on the narrow
face of the material shall be spaced at a minimum of 3 inches (76 mm) for 8d common nails.
4 inches (102 mm) for 10d and 12d common nails, and 8 inches (203 mm) for 16d common
nails.
Design values for bolts used perpendicular to glue lines
shall be as provided in the applicable code for solid-sawn lumber with a specific gravity
of 0.50.
4.0 INSTALLATION
Construction documents and manufacturer's installation
instructions for erection and installation of StrucLam laminated veneer lumber for each
job shall be complied with, and a copy of these instructions shall be available at all
times on the jobsite during installation.
5.0 IDENTIFICATION
The StrucLam and G-P Lam laminated veneer lumber shall be
identified by marks containing the name of the manufacturer, the plant location, the
product trade name and grade, the number of this report and the name of the quality
control agency (APA-Engineered Wood Systems. NER - QA397).
| This report is limited to the specific
product and data and test reports submitted by the applicant in its application requesting
this report. No independent tests were performed by the National Evaluation Service, Inc.
(NES), and NES specifically does not make any warranty, either expressed or implied, as to
any finding or other matter in this report or as to any product covered by this report.
This disclaimer includes, but is not limited to, merchantability. This report is also
subject to the limitation listed herein. |
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