7/8″ Bolt or dowelDouble Shear, Spruce-Pine glulam to 6 mm steel plates

Selection Tables

	7/8″ Bolt or dowel Double Shear, Spruce-Pine glulam to 6 mm 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	20.9(R)	31.4(R)	41.8(R)	48.7(c)	48.7(c)	31.4(R)	47.0(R)	62.7(R)	73.0(c)	73.0(c)
80	228	2	66.675	41.8(R)	62.7(R)	82.2(G)	92.7(G)	97.4(c)	62.7(R)	87.5(G)	103(G)	119(G)	135(G)
80	228	2	111.125	41.8(R)	62.7(R)	83.6(R)	97.4(c)	97.4(c)	62.7(R)	94.1(R)	125(R)	146(c)	146(c)
80	266	2	125	41.8(R)	62.7(R)	83.6(R)	97.4(c)	97.4(c)	62.7(R)	94.1(R)	125(R)	146(c)	146(c)
130	152	1	0	34.0(R)	51.0(R)	68.0(R)	79.1(c)	79.1(c)	51.0(R)	76.4(R)	102(R)	119(c)	119(c)
130	228	2	66.675	68.0(R)	102(R)	134(G)	151(G)	158(c)	102(R)	142(G)	168(G)	193(G)	219(G)
130	228	2	111.125	68.0(R)	102(R)	136(R)	158(c)	158(c)	102(R)	153(R)	204(R)	237(c)	237(c)
130	266	2	125	68.0(R)	102(R)	136(R)	158(c)	158(c)	102(R)	153(R)	204(R)	237(c)	237(c)
175	190	1	0	45.7(R)	68.6(R)	91.5(R)	93.3(g)	93.3(g)	68.6(R)	103(R)	137(R)	140(g)	140(g)
175	228	2	66.675	91.5(R)	137(R)	180(G)	187(g)	187(g)	137(R)	191(G)	226(G)	260(G)	280(g)
175	228	2	111.125	91.5(R)	137(R)	183(R)	187(g)	187(g)	137(R)	206(R)	274(R)	280(g)	280(g)
175	266	2	125	91.5(R)	137(R)	183(R)	187(g)	187(g)	137(R)	206(R)	274(R)	280(g)	280(g)
215	266	1	0	56.2(R)	84.3(R)	93.3(g)	93.3(g)	93.3(g)	84.3(R)	126(R)	140(g)	140(g)	140(g)
215	266	2	66.675	112(R)	169(R)	187(g)	187(g)	187(g)	169(R)	235(G)	277(G)	280(g)	280(g)
215	266	2	111.125	112(R)	169(R)	187(g)	187(g)	187(g)	169(R)	253(R)	280(g)	280(g)	280(g)
215	266	2	125	112(R)	169(R)	187(g)	187(g)	187(g)	169(R)	253(R)	280(g)	280(g)	280(g)
265	342	1	0	69.3(R)	93.3(g)	93.3(g)	93.3(g)	93.3(g)	104(R)	140(g)	140(g)	140(g)	140(g)
265	342	2	66.675	139(R)	187(g)	187(g)	187(g)	187(g)	208(R)	280(g)	280(g)	280(g)	280(g)
265	342	2	111.125	139(R)	187(g)	187(g)	187(g)	187(g)	208(R)	280(g)	280(g)	280(g)	280(g)
265	342	2	125	139(R)	187(g)	187(g)	187(g)	187(g)	208(R)	280(g)	280(g)	280(g)	280(g)
315	380	1	0	82.3(R)	93.3(g)	93.3(g)	93.3(g)	93.3(g)	123(R)	140(g)	140(g)	140(g)	140(g)
315	380	2	66.675	165(R)	187(g)	187(g)	187(g)	187(g)	247(R)	280(g)	280(g)	280(g)	280(g)
315	380	2	111.125	165(R)	187(g)	187(g)	187(g)	187(g)	247(R)	280(g)	280(g)	280(g)	280(g)
315	380	2	125	165(R)	187(g)	187(g)	187(g)	187(g)	247(R)	280(g)	280(g)	280(g)	280(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, Spruce-Pine glulam to 6 mm 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

20.9(R)

31.4(R)

41.8(R)

48.7(c)

31.4(R)

47.0(R)

62.7(R)

73.0(c)

228

66.675

41.8(R)

62.7(R)

82.2(G)

92.7(G)

97.4(c)

62.7(R)

87.5(G)

103(G)

119(G)

135(G)

228

111.125

41.8(R)

62.7(R)

83.6(R)

97.4(c)

62.7(R)

94.1(R)

125(R)

146(c)

266

125

41.8(R)

62.7(R)

83.6(R)

97.4(c)

62.7(R)

94.1(R)

125(R)

146(c)

130

152

34.0(R)

51.0(R)

68.0(R)

79.1(c)

51.0(R)

76.4(R)

102(R)

119(c)

130

228

66.675

68.0(R)

102(R)

134(G)

151(G)

158(c)

102(R)

142(G)

168(G)

193(G)

219(G)

130

228

111.125

68.0(R)

102(R)

136(R)

158(c)

102(R)

153(R)

204(R)

237(c)

130

266

125

68.0(R)

102(R)

136(R)

158(c)

102(R)

153(R)

204(R)

237(c)

175

190

45.7(R)

68.6(R)

91.5(R)

93.3(g)

68.6(R)

103(R)

137(R)

140(g)

175

228

66.675

91.5(R)

137(R)

180(G)

187(g)

137(R)

191(G)

226(G)

260(G)

280(g)

175

228

111.125

91.5(R)

137(R)

183(R)

187(g)

137(R)

206(R)

274(R)

280(g)

175

266

125

91.5(R)

137(R)

183(R)

187(g)

137(R)

206(R)

274(R)

280(g)

215

266

56.2(R)

84.3(R)

93.3(g)

84.3(R)

126(R)

140(g)

215

266

66.675

112(R)

169(R)

187(g)

169(R)

235(G)

277(G)

280(g)

215

266

111.125

112(R)

169(R)

187(g)

169(R)

253(R)

280(g)

215

266

125

112(R)

169(R)

187(g)

169(R)

253(R)

280(g)

265

342

69.3(R)

93.3(g)

104(R)

140(g)

265

342

66.675

139(R)

187(g)

208(R)

280(g)

265

342

111.125

139(R)

187(g)

208(R)

280(g)

265

342

125

139(R)

187(g)

208(R)

280(g)

315

380

82.3(R)

93.3(g)

123(R)

140(g)

315

380

66.675

165(R)

187(g)

247(R)

280(g)

315

380

111.125

165(R)

187(g)

247(R)

280(g)

315

380

125

165(R)

187(g)

247(R)

280(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.