Gypsum Wallboard Vrs

The lateral shear resistance of gypsum wallboard sheathing is

V_rs / L_s = f v_d J_hd

Safety Factor f

f = 0.7

Unit shear strength v_d

Unit lateral shear strength v_d is given in O86 Table 11.4 and modified by the notes below that table, and depends on

• GWB panel thickness
• Fastener spacing at panel edge
• Whether wall is blocked or unblocked
• For unblocked walls, stud spacing (Note 1)

Hold-down Effect Factor J_hd

Refer to Hold-down Effect Factor Jhd.