Trus Joist Framers Handbook.pdf
Trus Joist Framers Handbook.pdf
Trus Joist Framers Handbook.pdf
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ROOF DETAILS<br />
7<br />
Shear blocking—<br />
1 1 ⁄4" TimberStrand ® LSL<br />
rim board, iLevel 1 1 ⁄8"<br />
rim board, or TJI ® joist<br />
V-cut shear blocking—<br />
1 1 ⁄4" TimberStrand ® LSL<br />
rim board<br />
Beveled bearing<br />
plate required when<br />
slope exceeds 1 ⁄4"<br />
in 12"<br />
Variable slope<br />
seat connector<br />
R1<br />
1⁄3 adjacent span maximum<br />
R3<br />
1⁄3 adjacent span maximum<br />
Intermediate Bearing<br />
Blocking panels or shear blocking may be specified<br />
for joist stability at intermediate supports.<br />
Beveled web stiffeners<br />
on both sides. Cut to<br />
match roof slope.<br />
Web stiffeners<br />
required each side<br />
at R7W<br />
Twist strap and backer block<br />
required at R7S with slopes<br />
greater than 3" per foot.<br />
See Nailing Requirements,<br />
page 8.<br />
TJI ® joist<br />
flange must<br />
bear fully on<br />
plate<br />
2'-0"<br />
maximum<br />
2x4 block for<br />
soffit support<br />
Birdsmouth<br />
cut must not<br />
overhang<br />
inside face<br />
of plate<br />
Beveled<br />
bearing plate<br />
required when<br />
slope exceeds<br />
1⁄4" in 12"<br />
R5<br />
Birdsmouth cut allowed at low end of joist only<br />
R7 R7W R7S
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