Lumber to steel plate  
Wood member thickness t (mm) 
Bolt or dowel diameter (in) 

Type 10 (double shear)  
Lumber species  
D.FirL  HemFir  SPF  Northern  
38  1/2  3.63(c)  3.41(c)  3.11(c)  2.60(c)  
38  5/8  4.38(c)  4.11(c)  3.75(c)  3.13(c)  
38  3/4  5.05(c)  4.74(c)  4.33(c)  3.61(c)  
38  7/8  5.66(c)  5.32(c)  4.86(c)  4.05(c)  
38  1  6.21(c)  5.83(c)  5.32(c)  4.44(c)  
89  1/2  8.51(c)  7.99(c)  7.29(c)  6.08(c)  
89  5/8  10.3(c)  9.62(c)  8.79(c)  7.32(c)  
89  3/4  11.8(c)  11.1(c)  10.1(c)  8.45(c)  
89  7/8  13.3(c)  12.5(c)  11.4(c)  9.48(c)  
89  1  14.5(c)  13.7(c)  12.5(c)  10.4(c)  
140  1/2  11.3(g)  11.0(g)  10.5(g)  9.56(c)  
140  5/8  16.1(c)  15.1(c)  13.8(c)  11.5(c)  
140  3/4  18.6(c)  17.5(c)  16.0(c)  13.3(c)  
140  7/8  20.9(c)  19.6(c)  17.9(c)  14.9(c)  
140  1  22.9(c)  21.5(c)  19.6(c)  16.3(c)  
191  1/2  11.3(g)  11.0(g)  10.5(g)  9.59(g)  
191  5/8  17.4(g)  16.9(g)  16.1(g)  14.7(g)  
191  3/4  24.6(g)  23.8(g)  21.8(c)  18.1(c)  
191  7/8  28.5(c)  26.7(c)  24.4(c)  20.3(c)  
191  1  31.2(c)  29.3(c)  26.8(c)  22.3(c)  
241  1/2  11.3(g)  11.0(g)  10.5(g)  9.59(g)  
241  5/8  17.4(g)  16.9(g)  16.1(g)  14.7(g)  
241  3/4  24.6(g)  23.8(g)  22.8(g)  20.8(g)  
241  7/8  32.8(g)  31.8(g)  30.4(g)  25.7(c)  
241  1  39.4(c)  37.0(c)  33.8(c)  28.1(c)  
292  1/2  11.3(g)  11.0(g)  10.5(g)  9.59(g)  
292  5/8  17.4(g)  16.9(g)  16.1(g)  14.7(g)  
292  3/4  24.6(g)  23.8(g)  22.8(g)  20.8(g)  
292  7/8  32.8(g)  31.8(g)  30.4(g)  27.7(g)  
292  1  41.9(g)  40.6(g)  38.8(g)  34.1(c)  
Notes:

