7/8″ Bolt or dowelSingle Shear, D. Fir-L lumber to 6mm steel plates

Selection Tables

	7/8″ Bolt or dowel Single Shear, D. Fir-L lumber to 6mm steel plates
Wood Member	Fastener
Thickness (mm)	Depth (mm)	No. of rows		No. of fasteners in a row
2	3
Bolt spacing in a row taken as the minimum of the loaded end distance³, a_L, and the spacing between bolts in a row, S_R (mm)
89	133	178	222	267	89	133	178	222	267
38	140	1	0	7.01(R)	10.5(R)	14.0(R)	17.5(R)	21.0(R)	10.5(R)	15.8(R)	21.0(R)	26.3(R)	29.9(T)
38	235	2	66.675	13.6(G)	17.1(G)	20.6(G)	24.1(G)	27.6(G)	17.1(G)	22.3(G)	27.6(G)	32.8(G)	38.1(G)
38	235	2	111.125	14.0(R)	21.0(R)	27.4(G)	30.9(G)	34.4(G)	21.0(R)	29.2(G)	34.4(G)	39.7(G)	40.7(T)
38	286	2	125	14.0(R)	21.0(R)	28.0(R)	33.1(G)	36.6(G)	21.0(R)	31.3(G)	36.6(G)	41.8(G)	47.1(G)
89	140	1	0	16.4(R)	24.6(R)	32.8(R)	41.0(R)	49.2(g)	24.6(R)	36.9(R)	49.2(R)	61.6(R)	69.9(T)
89	235	2	66.675	31.8(G)	40.0(G)	48.2(G)	56.4(G)	64.6(G)	40.0(G)	52.3(G)	64.6(G)	76.9(G)	89.2(G)
89	235	2	111.125	32.8(R)	49.2(R)	64.2(G)	72.4(G)	80.6(G)	49.2(R)	68.3(G)	80.6(G)	93.0(G)	95.3(T)
89	286	2	125	32.8(R)	49.2(R)	65.7(R)	77.5(G)	85.7(G)	49.2(R)	73.4(G)	85.7(G)	98.0(G)	110(G)
140	140	1	0	20.4(R)	30.6(R)	40.8(R)	49.2(g)	49.2(g)	30.6(R)	45.9(R)	61.2(R)	72.1(T)	72.1(T)
140	241	2	66.675	34.1(G)	44.3(G)	54.5(G)	64.7(G)	74.9(G)	44.3(G)	59.6(G)	74.9(G)	88.1(T)	88.1(T)
140	241	2	111.125	40.8(R)	58.7(G)	68.9(G)	79.1(G)	88.1(T)	58.7(G)	74.0(G)	88.1(T)	88.1(T)	88.1(T)
140	292	2	125	40.8(R)	61.2(R)	73.4(G)	83.6(G)	93.8(G)	61.2(R)	78.5(G)	93.8(G)	101(T)	101(T)
191	140	1	0	27.8(R)	41.7(R)	49.2(g)	49.2(g)	49.2(g)	41.7(R)	62.6(R)	73.8(g)	73.8(g)	73.8(g)
191	241	2	66.675	49.4(G)	63.3(G)	77.2(G)	91.1(G)	98.4(g)	63.3(G)	84.1(G)	105(G)	126(G)	138(T)
191	241	2	111.125	55.6(R)	83.4(R)	98.4(g)	98.4(g)	98.4(g)	83.4(R)	107(G)	128(G)	138(T)	138(T)
191	292	2	125	55.6(R)	83.4(R)	98.4(g)	98.4(g)	98.4(g)	83.4(R)	107(G)	128(G)	138(T)	138(T)
241	140	1	0	35.1(R)	49.2(g)	49.2(g)	49.2(g)	49.2(g)	52.6(R)	73.8(g)	73.8(g)	73.8(g)	73.8(g)
241	241	2	66.675	62.3(G)	79.9(G)	97.4(G)	98.4(g)	98.4(g)	79.9(G)	106(G)	132(G)	148(g)	148(g)
241	241	2	111.125	70.2(R)	98.4(g)	98.4(g)	98.4(g)	98.4(g)	105(R)	135(G)	148(g)	148(g)	148(g)
241	292	2	125	70.2(R)	98.4(g)	98.4(g)	98.4(g)	98.4(g)	105(R)	144(G)	148(g)	148(g)	148(g)
292	140	1	0	42.5(R)	49.2(g)	49.2(g)	49.2(g)	49.2(g)	63.8(R)	73.8(g)	73.8(g)	73.8(g)	73.8(g)
292	241	2	66.675	75.5(G)	96.8(G)	98.4(g)	98.4(g)	98.4(g)	96.8(G)	129(G)	148(g)	148(g)	148(g)
292	241	2	111.125	85.0(R)	98.4(g)	98.4(g)	98.4(g)	98.4(g)	128(R)	148(g)	148(g)	148(g)	148(g)
292	292	2	125	85.0(R)	98.4(g)	98.4(g)	98.4(g)	98.4(g)	128(R)	148(g)	148(g)	148(g)	148(g)

Notes: The tabulated values are the minimum of the yielding resistance, row shear, group tear-out and net tension resistances of the wood member, and are applicable to tension members. For compression members, the values are conservative when the governing failure mode is indicated as group tear-out or net tension since the resistance is based on yielding and row shear only. The governing failure mode for each connection configuration is denoted either by lowercase letter (a)-(g), indicating the specific yielding failure mode as per O86 Clause 12.4.4.3.2, or by uppercase letter (R), (G) or (T), indicating failure due to row shear, group tear-out or net tension in the main member. The minimum loaded end distance, a_L, is the maximum of 50 mm and 5 times the fastener diameter (O86 Clause 12.4.3.1). For the calculation of group tear-out and net tension resistances, the fastener hole diameter is assumed to be 2 mm larger than the fastener diameter. The connection resistance P'_r is required to be adjusted to end-use conditions using modification factors depending on the governing failure mode as follows: P_r = P'_r for yielding failure mode (a), P_r = P'_r (K_D K_SF K_T) for yielding failure mode (b), P_r = P'_r (K_Dy K_SF K_T) for yielding failure mode (d), (e), (f) or (g), P_r = P'_r (K_D K_Sv K_T) for row shear, P_r = P'_r (K_D K_St K_T) for group tear-out or net tension. Modification factors are provided in Section 7.4 of the Wood Design Manual 2020. For untreated wood members under standard-term loading and dry service conditions, the modification factors are 1.0. Tabulated values are based on No.1/ No.2 grade for dimension lumber (38 to 102 mm in smaller dimension) and No.2 grade for timbers (114 or more in smaller dimension). Tabulated values are based on ASTM A307 grade steel bolts or dowels, and ASTM A36/A36M grade steel plate. The resistance of steel plate needs to be checked separately. A single steel splice plate is not permitted to be used for multiple rows of bolts or dowels when the distance between the two outer rows exceeds 125 mm. N/A = not applicable.	.

7/8″ Bolt or dowel
Single Shear, D. Fir-L lumber to 6mm steel plates

Wood Member

Fastener

Thickness
(mm)

Depth
(mm)

No.
of
rows

No. of fasteners in a row

Bolt spacing in a row taken as the minimum of the loaded end distance³, a_L, and the spacing between bolts in a row, S_R (mm)

133

178

222

267

133

178

222

267

140

7.01(R)

10.5(R)

14.0(R)

17.5(R)

21.0(R)

10.5(R)

15.8(R)

21.0(R)

26.3(R)

29.9(T)

235

66.675

13.6(G)

17.1(G)

20.6(G)

24.1(G)

27.6(G)

17.1(G)

22.3(G)

27.6(G)

32.8(G)

38.1(G)

235

111.125

14.0(R)

21.0(R)

27.4(G)

30.9(G)

34.4(G)

21.0(R)

29.2(G)

34.4(G)

39.7(G)

40.7(T)

286

125

14.0(R)

21.0(R)

28.0(R)

33.1(G)

36.6(G)

21.0(R)

31.3(G)

36.6(G)

41.8(G)

47.1(G)

140

16.4(R)

24.6(R)

32.8(R)

41.0(R)

49.2(g)

24.6(R)

36.9(R)

49.2(R)

61.6(R)

69.9(T)

235

66.675

31.8(G)

40.0(G)

48.2(G)

56.4(G)

64.6(G)

40.0(G)

52.3(G)

64.6(G)

76.9(G)

89.2(G)

235

111.125

32.8(R)

49.2(R)

64.2(G)

72.4(G)

80.6(G)

49.2(R)

68.3(G)

80.6(G)

93.0(G)

95.3(T)

286

125

32.8(R)

49.2(R)

65.7(R)

77.5(G)

85.7(G)

49.2(R)

73.4(G)

85.7(G)

98.0(G)

110(G)

140

20.4(R)

30.6(R)

40.8(R)

49.2(g)

30.6(R)

45.9(R)

61.2(R)

72.1(T)

140

241

66.675

34.1(G)

44.3(G)

54.5(G)

64.7(G)

74.9(G)

44.3(G)

59.6(G)

74.9(G)

88.1(T)

140

241

111.125

40.8(R)

58.7(G)

68.9(G)

79.1(G)

88.1(T)

58.7(G)

74.0(G)

88.1(T)

140

292

125

40.8(R)

61.2(R)

73.4(G)

83.6(G)

93.8(G)

61.2(R)

78.5(G)

93.8(G)

101(T)

191

140

27.8(R)

41.7(R)

49.2(g)

41.7(R)

62.6(R)

73.8(g)

191

241

66.675

49.4(G)

63.3(G)

77.2(G)

91.1(G)

98.4(g)

63.3(G)

84.1(G)

105(G)

126(G)

138(T)

191

241

111.125

55.6(R)

83.4(R)

98.4(g)

83.4(R)

107(G)

128(G)

138(T)

191

292

125

55.6(R)

83.4(R)

98.4(g)

83.4(R)

107(G)

128(G)

138(T)

241

140

35.1(R)

49.2(g)

52.6(R)

73.8(g)

241

66.675

62.3(G)

79.9(G)

97.4(G)

98.4(g)

79.9(G)

106(G)

132(G)

148(g)

241

111.125

70.2(R)

98.4(g)

105(R)

135(G)

148(g)

241

292

125

70.2(R)

98.4(g)

105(R)

144(G)

148(g)

292

140

42.5(R)

49.2(g)

63.8(R)

73.8(g)

292

241

66.675

75.5(G)

96.8(G)

98.4(g)

96.8(G)

129(G)

148(g)

292

241

111.125

85.0(R)

98.4(g)

128(R)

148(g)

292

125

85.0(R)

98.4(g)

128(R)

148(g)

Notes:

The tabulated values are the minimum of the yielding resistance, row shear, group tear-out and net tension resistances of the wood member, and are applicable to tension members. For compression members, the values are conservative when the governing failure mode is indicated as group tear-out or net tension since the resistance is based on yielding and row shear only.
The governing failure mode for each connection configuration is denoted either by lowercase letter (a)-(g), indicating the specific yielding failure mode as per O86 Clause 12.4.4.3.2, or by uppercase letter (R), (G) or (T), indicating failure due to row shear, group tear-out or net tension in the main member.
The minimum loaded end distance, a_L, is the maximum of 50 mm and 5 times the fastener diameter (O86 Clause 12.4.3.1).
For the calculation of group tear-out and net tension resistances, the fastener hole diameter is assumed to be 2 mm larger than the fastener diameter.
The connection resistance P'_r is required to be adjusted to end-use conditions using modification factors depending on the governing failure mode as follows:
- P_r = P'_r for yielding failure mode (a),
- P_r = P'_r (K_D K_SF K_T) for yielding failure mode (b),
- P_r = P'_r (K_Dy K_SF K_T) for yielding failure mode (d), (e), (f) or (g),
- P_r = P'_r (K_D K_Sv K_T) for row shear,
- P_r = P'_r (K_D K_St K_T) for group tear-out or net tension.
Modification factors are provided in Section 7.4 of the Wood Design Manual 2020. For untreated wood members under standard-term loading and dry service conditions, the modification factors are 1.0.
Tabulated values are based on No.1/ No.2 grade for dimension lumber (38 to 102 mm in smaller dimension) and No.2 grade for timbers (114 or more in smaller dimension).
Tabulated values are based on ASTM A307 grade steel bolts or dowels, and ASTM A36/A36M grade steel plate. The resistance of steel plate needs to be checked separately.
A single steel splice plate is not permitted to be used for multiple rows of bolts or dowels when the distance between the two outer rows exceeds 125 mm.
N/A = not applicable.