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

Selection Tables

	7/8″ Bolt or dowel Double Shear, D. Fir-L glulam 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
80	114	1	0	23.9(R)	35.8(R)	47.8(R)	54.2(c)	54.2(c)	35.8(R)	53.8(R)	71.7(R)	81.3(c)	81.3(c)
80	228	2	66.675	47.8(R)	71.7(R)	95.6(R)	108(G)	108(c)	71.7(R)	102(G)	120(G)	138(G)	156(G)
80	228	2	111.125	47.8(R)	71.7(R)	95.6(R)	108(c)	108(c)	71.7(R)	108(R)	143(R)	163(c)	163(c)
80	266	2	125	47.8(R)	71.7(R)	95.6(R)	108(c)	108(c)	71.7(R)	108(R)	143(R)	163(c)	163(c)
130	152	1	0	38.8(R)	58.2(R)	77.7(R)	88.1(c)	88.1(c)	58.2(R)	87.4(R)	116(R)	132(c)	132(c)
130	228	2	66.675	77.7(R)	116(R)	155(R)	176(G)	176(c)	116(R)	166(G)	195(G)	224(G)	254(G)
130	228	2	111.125	77.7(R)	116(R)	155(R)	176(c)	176(c)	116(R)	175(R)	233(R)	264(c)	264(c)
130	266	2	125	77.7(R)	116(R)	155(R)	176(c)	176(c)	116(R)	175(R)	233(R)	264(c)	264(c)
175	190	1	0	52.3(R)	78.4(R)	98.4(g)	98.4(g)	98.4(g)	78.4(R)	118(R)	148(g)	148(g)	148(g)
175	228	2	66.675	105(R)	157(R)	197(g)	197(g)	197(g)	157(R)	224(G)	263(G)	295(g)	295(g)
175	228	2	111.125	105(R)	157(R)	197(g)	197(g)	197(g)	157(R)	235(R)	295(g)	295(g)	295(g)
175	266	2	125	105(R)	157(R)	197(g)	197(g)	197(g)	157(R)	235(R)	295(g)	295(g)	295(g)
215	266	1	0	64.2(R)	96.3(R)	98.4(g)	98.4(g)	98.4(g)	96.3(R)	144(R)	148(g)	148(g)	148(g)
215	266	2	66.675	128(R)	193(R)	197(g)	197(g)	197(g)	193(R)	275(G)	295(g)	295(g)	295(g)
215	266	2	111.125	128(R)	193(R)	197(g)	197(g)	197(g)	193(R)	289(R)	295(g)	295(g)	295(g)
215	266	2	125	128(R)	193(R)	197(g)	197(g)	197(g)	193(R)	289(R)	295(g)	295(g)	295(g)
265	342	1	0	79.2(R)	98.4(g)	98.4(g)	98.4(g)	98.4(g)	119(R)	148(g)	148(g)	148(g)	148(g)
265	342	2	66.675	158(R)	197(g)	197(g)	197(g)	197(g)	237(R)	295(g)	295(g)	295(g)	295(g)
265	342	2	111.125	158(R)	197(g)	197(g)	197(g)	197(g)	237(R)	295(g)	295(g)	295(g)	295(g)
265	342	2	125	158(R)	197(g)	197(g)	197(g)	197(g)	237(R)	295(g)	295(g)	295(g)	295(g)
315	380	1	0	94.1(R)	98.4(g)	98.4(g)	98.4(g)	98.4(g)	141(R)	148(g)	148(g)	148(g)	148(g)
315	380	2	66.675	188(R)	197(g)	197(g)	197(g)	197(g)	282(R)	295(g)	295(g)	295(g)	295(g)
315	380	2	111.125	188(R)	197(g)	197(g)	197(g)	197(g)	282(R)	295(g)	295(g)	295(g)	295(g)
315	380	2	125	188(R)	197(g)	197(g)	197(g)	197(g)	282(R)	295(g)	295(g)	295(g)	295(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 (c), P_r = P'_r (K_Dy K_SF K_T) for yielding failure mode (d) 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. For D.Fir-L glulam, the tabulated values are valid for 24f-E, 24f-EX, 20f-E, 20f-EX or 16c-E grade. For Spruce-Pine glulam, the tabulated values are valid for 20f-E, 20f-EX or 12c-E grade. Tabulated values are based on ASTM A307 grade steel bolts or dowels. 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
Double Shear, D. Fir-L glulam 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

114

23.9(R)

35.8(R)

47.8(R)

54.2(c)

35.8(R)

53.8(R)

71.7(R)

81.3(c)

228

66.675

47.8(R)

71.7(R)

95.6(R)

108(G)

108(c)

71.7(R)

102(G)

120(G)

138(G)

156(G)

228

111.125

47.8(R)

71.7(R)

95.6(R)

108(c)

71.7(R)

108(R)

143(R)

163(c)

266

125

47.8(R)

71.7(R)

95.6(R)

108(c)

71.7(R)

108(R)

143(R)

163(c)

130

152

38.8(R)

58.2(R)

77.7(R)

88.1(c)

58.2(R)

87.4(R)

116(R)

132(c)

130

228

66.675

77.7(R)

116(R)

155(R)

176(G)

176(c)

116(R)

166(G)

195(G)

224(G)

254(G)

130

228

111.125

77.7(R)

116(R)

155(R)

176(c)

116(R)

175(R)

233(R)

264(c)

130

266

125

77.7(R)

116(R)

155(R)

176(c)

116(R)

175(R)

233(R)

264(c)

175

190

52.3(R)

78.4(R)

98.4(g)

78.4(R)

118(R)

148(g)

175

228

66.675

105(R)

157(R)

197(g)

157(R)

224(G)

263(G)

295(g)

175

228

111.125

105(R)

157(R)

197(g)

157(R)

235(R)

295(g)

175

266

125

105(R)

157(R)

197(g)

157(R)

235(R)

295(g)

215

266

64.2(R)

96.3(R)

98.4(g)

96.3(R)

144(R)

148(g)

215

266

66.675

128(R)

193(R)

197(g)

193(R)

275(G)

295(g)

215

266

111.125

128(R)

193(R)

197(g)

193(R)

289(R)

295(g)

215

266

125

128(R)

193(R)

197(g)

193(R)

289(R)

295(g)

265

342

79.2(R)

98.4(g)

119(R)

148(g)

265

342

66.675

158(R)

197(g)

237(R)

295(g)

265

342

111.125

158(R)

197(g)

237(R)

295(g)

265

342

125

158(R)

197(g)

237(R)

295(g)

315

380

94.1(R)

98.4(g)

141(R)

148(g)

315

380

66.675

188(R)

197(g)

282(R)

295(g)

315

380

111.125

188(R)

197(g)

282(R)

295(g)

315

380

125

188(R)

197(g)

282(R)

295(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 (c),
- P_r = P'_r (K_Dy K_SF K_T) for yielding failure mode (d) 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.
For D.Fir-L glulam, the tabulated values are valid for 24f-E, 24f-EX, 20f-E, 20f-EX or 16c-E grade. For Spruce-Pine glulam, the tabulated values are valid for 20f-E, 20f-EX or 12c-E grade.
Tabulated values are based on ASTM A307 grade steel bolts or dowels. 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.