Residential Floor & Roof Systems Installation Guide - Sistemas ...

Engineered Lumber Installation Guide
General Notes for Multiple-Piece G-P Lam ® LVL Members
1. Top and bottom rows of connectors should be 2� from edge.
2. Bolt holes are to be the same diameter as the bolt. Every bolt must extend through the full thickness of the member. Use washers under
head and nut. Carriage bolts may be used, but the outermost portion of the head may not be drawn in beyond flush with the outside face
of the LVL member.
3. For three-piece members attached with nails or screws, specified attachment is from each side. Stagger fasteners from opposite sides
by half the fastener spacing to avoid splitting.
4. To minimize rotation, 7" wide members should only be used when loads are applied to both sides, or completely across the top
of the member.
5. 7" wide members, regardless of depth, must be attached using bolts or screws.
Fastening Recommendations for Top-Loaded,
Multiple-Piece Members
Connection reference (A, B, C, etc.) refers to the fastening pattern on page 18.
17
Member Depth 3 1 /2�– 5 1 /4� Wide Multiple Piece Member 7� Wide Multiple Piece Member
9 1 /4�–11 7 /8�
14�–18�
2 rows 16d nails at 12� o.c.
(pattern A)
3 rows 16d nails at 12� o.c.
(pattern B)
Wall of same thickness as multiple-piece G-P Lam LVL and centered
over beam. Multiple-piece LVL beam should not be placed directly
below plumbing walls. LVL beams are not to be notched or drilled
except as noted on pages 16 and 19.
2 rows 1 /2� bolts at 24� o.c.
(pattern C)
or
2 rows 1 /4� x 6� wood screws at 24� o.c.
(see note 3 on page 18)
Joist bearing completely across
top of multiple-piece beam
Top-loaded conditions may result from I-joist details similar to F9, F10 and R3.
In details F9 and F10, the supporting wall may be replaced with properly sized multiple-piece G-P Lam LVL.
Georgia-Pacific Corporation, September 2003