Shear-X™ Bracket Specifications

Spacing Shear-X Brackets

Use table on below to determine how many Shear-X brackets you'll need for maximum strength and resistance. The table provides the maximum spacing between each Shear-X bracket installed along the ridgeline of a blocked wood structural panel diaphragm for the sheathing, fastener and framing conditions shown.

If your specific application is not covered by this table, refer to DrJ TER No. 1509-03 and use the allowable load values for the Shear-X brackets to determine the maximum spacing requirements.

Maximum Spacing Between Shear-X Brackets Along Ridge

  • The table assumes the wood structural panels are attached to the roof framing and blocking with single rows of fasteners. Applications requiring blocked wood structural panel diaphragms with multiple rows of fasteners (i.e., High Load Diaphragms) are beyond the scope of this document.
  • The roof system must have a continuous ridge board or ridge beam (minimum 2x_). If wood trusses are used for the roof framing, a continuous “riser board” must be installed with the top edge tight to the underside of the projected roof sheathing.
  • In addition to the diaphragm blocking, install minimum No. 2 SPF 2x4 blocking in line with the edges of the Shear-X bracket. Cut blocking to fit tight between framing and attach each end to framing with three 0.131"x 3-1/4" face nails. Attach wood structural panel sheathing to blocking per the boundary nailing requirements for the blocked diaphragm case being used.
Maximum Spacing Between Shear-X Brackets Along Ridge Blocked Diaphragms-Shear-X Spacing (ft)
Seismic Wind
Panel Sheathing Grade Nail Size Minimum Fastener Penetration in Framing Member or Blocking (in) Minimum Nominal Panel Thickness (in) Minimum Nominal Width of Nailed Face at Adjoining Panel Edges and Boundaries (in) Nail Spacing (in) at Diaphragm Boundaries (all Cases), at Continuous Panel Edges Parallel to Load (Cases 3 & 4), and at all Panel Edges (Cases 5 & 6)
6 4 6 4
Nail Spacing (in) at other Panel Edges (Cases 1, 2, 3 & 4)
6 6 6 6
16 24 16 24 16 24 16 24
Structural I 10d (0.148"x3") 1 -1/2 15/32 2 5' 4" 6' 0" 4' 0" 4' 0" 2' 8" 4' 0" 2' 8" NA
3 4' 0" 4' 0" 2' 8" 4' 0" 2' 8" NA NA NA
Sheathing and Single-Floor 8d (0.131"x2-1/2") 1 -3/8 7/16 2 6' 8" 6' 0" 4' 0" 4' 0" 4' 0" 4' 0" 2' 8" 4' 0"
3 5' 4" 6' 0" 4' 0" 4' 0" 4' 0" 4' 0" 2' 8" NA
15/32 2 5' 4" 6' 0" 4' 0" 4' 0" 4' 0" 4' 0" 2' 8" NA
3 5' 4" 6' 0" 4' 0" 4' 0" 4' 0" 4' 0" 2' 8" NA
10d (0.148"x3") 1 -1/2 15/32 2 5' 4" 6' 0" 4' 0" 4' 0" 4' 0" 4' 0" 2' 8" NA
3 5' 4" 4' 0" 4' 0" 4' 0" 2' 8" 4' 0" 2' 8" NA
19/32 2 5' 4" 6' 0" 4' 0" 4' 0" 2' 8" 4' 0" 2' 8" NA
3 4' 0" 4' 0" 2' 8" 4' 0" 2' 8" NA NA NA

Superior Strength Against Seismic and Lateral Wind Loads