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// CODE SNIPPET

1707.5 Lateral Brace Connections to Webs of Trusses

2014 FBC - Existing Building, 5th edition > 17 Retrofitting > 1707 Lateral Braces > 1707.5 Lateral Brace Connections to Webs of Trusses
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Where existing conditions prevent installation of lateral braces on top or bottom chords of trusses, they shall be permitted to be installed on diagonal webs or vertical members of trusses provided all of the following conditions are met.

  1. Lateral braces shall be positioned as close to the ceiling or roof diaphragms as existing conditions permit without altering trusses or any of their components.
  2. Anchor blocks shall be installed between each pair of attic-framing members along the length of the lateral brace except for the framing member space next to the gable end wall. Anchor blocks can be installed on the narrow or wide face of lateral braces.
  3. Anchor blocks shall be minimum 15/32-inch plywood, 7/16-inch OSB, or nominal 2-inch thick #2 spruce-pine-fir lumber or better.
  4. Anchor blocks shall be sized to extend towards the nearby ceiling or roof diaphragm to within 31/2 inches (89 mm) of the diaphragm. Anchor blocks shall butt against chords or diagonals or vertical webs of trusses or truss plates with a maximum gap of 1/8 inch (3 mm).
  5. Anchor blocks shall be fastened to lateral braces with 8d common or 10d common nails or #9 screws with minimum penetration into lateral braces equal to the thickness of the anchor blocks or 1 inch (25.4 mm), whichever is greater. The minimum number of fasteners shall be the maximum that can be placed in a row with a minimum 23/4 inches (70 mm) distance between fasteners and 23/4 inches (70 mm) distance to ends of anchor blocks except that the number need not exceed three fasteners for nominal 2-inch thick lumber anchor blocks.

Related Code Sections


1707.5 Retrofitting, Lateral Brace Connections to Webs of Trusses
on diagonal webs or vertical members of trusses provided all of the following conditions are met. Lateral braces shall be positioned as close ...
2014 FBC - Existing Building, 5th edition > 17 Retrofitting > 1707 Lateral Braces > 1707.5 Lateral Brace Connections to Webs of Trusses
1707.5 Retrofitting, Lateral Brace Connections to Webs of Trusses
on diagonal webs or vertical members of trusses provided all of the following conditions are met. Lateral braces shall be positioned as close to the ceiling ...
2017 FBC - Existing Building, 6th edition > 17 Retrofitting > 1707 Lateral Braces > 1707.5 Lateral Brace Connections to Webs of Trusses
1707.5 Retrofitting, Lateral Brace Connections to Webs of Trusses
on diagonal webs or vertical members of trusses provided all of the following conditions are met. Lateral braces shall be positioned as close to the ceiling ...
2020 FBC - Existing Building, 7th edition > 17 Retrofitting > 1707 Lateral Braces > 1707.5 Lateral Brace Connections to Webs of Trusses
R602.10.8.2 Wall Construction, Connections to Roof Framing
above the braced wall panel in accordance with Figure R602.10.8.2(1). Exception: Where the outside edge of truss vertical web members aligns ...
2017 FBC - Residential, 6th edition > 6 Wall Construction > R602 Wood Wall Framing > R602.10 Wall Bracing > R602.10.8 Braced Wall Panel Connections > R602.10.8.2 Connections to Roof Framing
Section 1707 Retrofitting, Lateral Braces
, they shall be permitted to be installed on diagonal webs or vertical members of trusses provided all of the following conditions are met. Lateral braces ...
2020 FBC - Existing Building, 7th edition > 17 Retrofitting > 1707 Lateral Braces
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