Cal. Code Regs. Tit. 8, div. 1, ch. 4, subch. 4, app B, Plate B-31-a

Current through Register 2025 Notice Reg. No. 2, January 10, 2025
Holding Power of Bolts

Loads Parallel to Grain (p)

Length of bolt in main

Diameter of bolt (inches)

member1 (inches) 1/2 5/8 3/4 7/8 11 5/8 1 1/4
1 5/8 .......................... 9101,1601,3901,6301,860
2 5/8 ..........................1,1501,7002,1902,6103,010
3 3/8 ..........................1,1601,8102,5703,3103,990
4 1/2 ..........................1,1601,8101,6002,5304,4805,380
5 1/2 ..........................-1,8102,6203,5504,6105,800
6 1/2 ..........................-1,8102,6002,5504,6305,850
7 1/2 ..........................-1,8102,6003,5504,6305,850
9 1/2 ..........................--2,6003,5504,6305,3507,240
11 1/2 ..........................----4,6305,8507,240

1 This assumes dressed size lumber. Safe loads for other lengths of bolt in main member may be obtained by interpolation.

Cal. Code Regs. Tit. 8, div. 1, ch. 4, subch. 4, app B, Plate B-31-a