3/4″ Bolt or dowelDouble Shear, D. Fir-L glulam to 6mm steel plates

Selection Tables

	3/4″ 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)
76	114	152	190	229	76	114	152	190	229
80	114	1	0	20.5(R)	30.7(R)	41.0(R)	48.4(c)	48.4(c)	30.7(R)	46.1(R)	61.4(R)	72.5(c)	72.5(c)
80	190	2	57.15	41.0(R)	61.4(R)	81.9(R)	92.4(G)	96.7(c)	61.4(R)	87.3(G)	103(G)	118(G)	133(G)
80	228	2	95.25	41.0(R)	61.4(R)	81.9(R)	96.7(c)	96.7(c)	61.4(R)	92.2(R)	123(R)	145(c)	145(c)
80	266	2	125	41.0(R)	61.4(R)	81.9(R)	96.7(c)	96.7(c)	61.4(R)	92.2(R)	123(R)	145(c)	145(c)
80	266	3	57.15	61.4(R)	92.2(R)	123(R)	134(G)	144(G)	92.2(R)	129(G)	144(G)	159(G)	175(G)
80	266	3	62.5	61.4(R)	92.2(R)	123(R)	145(c)	145(c)	92.2(R)	138(R)	156(G)	172(G)	187(G)
130	152	1	0	33.3(R)	49.9(R)	66.6(R)	73.7(g)	73.7(g)	49.9(R)	74.9(R)	99.9(R)	111(g)	111(g)
130	190	2	57.15	66.6(R)	99.9(R)	133(R)	147(g)	147(g)	99.9(R)	142(G)	167(G)	192(G)	217(G)
130	228	2	95.25	66.6(R)	99.9(R)	133(R)	147(g)	147(g)	99.9(R)	150(R)	200(R)	221(g)	221(g)
130	266	2	125	66.6(R)	99.9(R)	133(R)	147(g)	147(g)	99.9(R)	150(R)	200(R)	221(g)	221(g)
130	266	3	57.15	99.9(R)	150(R)	200(R)	217(G)	221(g)	150(R)	209(G)	234(G)	259(G)	284(G)
130	266	3	62.5	99.9(R)	150(R)	200(R)	221(g)	221(g)	150(R)	225(R)	254(G)	279(G)	304(G)
175	190	1	0	44.8(R)	67.2(R)	73.7(g)	73.7(g)	73.7(g)	67.2(R)	101(R)	111(g)	111(g)	111(g)
175	190	2	57.15	89.6(R)	134(R)	147(g)	147(g)	147(g)	134(R)	191(G)	221(g)	221(g)	221(g)
175	228	2	95.25	89.6(R)	134(R)	147(g)	147(g)	147(g)	134(R)	202(R)	221(g)	221(g)	221(g)
175	266	2	125	89.6(R)	134(R)	147(g)	147(g)	147(g)	134(R)	202(R)	221(g)	221(g)	221(g)
175	266	3	57.15	134(R)	202(R)	221(g)	221(g)	221(g)	202(R)	281(G)	315(G)	332(g)	332(g)
175	266	3	62.5	134(R)	202(R)	221(g)	221(g)	221(g)	202(R)	302(R)	332(g)	332(g)	332(g)
215	266	1	0	55.0(R)	73.7(g)	73.7(g)	73.7(g)	73.7(g)	82.6(R)	111(g)	111(g)	111(g)	111(g)
215	266	2	57.15	110(R)	147(g)	147(g)	147(g)	147(g)	165(R)	221(g)	221(g)	221(g)	221(g)
215	266	2	95.25	110(R)	147(g)	147(g)	147(g)	147(g)	165(R)	221(g)	221(g)	221(g)	221(g)
215	266	2	125	110(R)	147(g)	147(g)	147(g)	147(g)	165(R)	221(g)	221(g)	221(g)	221(g)
215	266	3	57.15	165(R)	221(g)	221(g)	221(g)	221(g)	248(R)	332(g)	332(g)	332(g)	332(g)
215	266	3	62.5	165(R)	221(g)	221(g)	221(g)	221(g)	248(R)	332(g)	332(g)	332(g)	332(g)
265	342	1	0	67.8(R)	73.7(g)	73.7(g)	73.7(g)	73.7(g)	102(R)	111(g)	111(g)	111(g)	111(g)
265	342	2	57.15	136(R)	147(g)	147(g)	147(g)	147(g)	204(R)	221(g)	221(g)	221(g)	221(g)
265	342	2	95.25	136(R)	147(g)	147(g)	147(g)	147(g)	204(R)	221(g)	221(g)	221(g)	221(g)
265	342	2	125	136(R)	147(g)	147(g)	147(g)	147(g)	204(R)	221(g)	221(g)	221(g)	221(g)
265	342	3	57.15	204(R)	221(g)	221(g)	221(g)	221(g)	305(R)	332(g)	332(g)	332(g)	332(g)
265	342	3	62.5	204(R)	221(g)	221(g)	221(g)	221(g)	305(R)	332(g)	332(g)	332(g)	332(g)
315	380	1	0	73.7(g)	73.7(g)	73.7(g)	73.7(g)	73.7(g)	111(g)	111(g)	111(g)	111(g)	111(g)
315	380	2	57.15	147(g)	147(g)	147(g)	147(g)	147(g)	221(g)	221(g)	221(g)	221(g)	221(g)
315	380	2	95.25	147(g)	147(g)	147(g)	147(g)	147(g)	221(g)	221(g)	221(g)	221(g)	221(g)
315	380	2	125	147(g)	147(g)	147(g)	147(g)	147(g)	221(g)	221(g)	221(g)	221(g)	221(g)
315	380	3	57.15	221(g)	221(g)	221(g)	221(g)	221(g)	332(g)	332(g)	332(g)	332(g)	332(g)
315	380	3	62.5	221(g)	221(g)	221(g)	221(g)	221(g)	332(g)	332(g)	332(g)	332(g)	332(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.	.

3/4″ 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)

114

152

190

229

114

152

190

229

114

20.5(R)

30.7(R)

41.0(R)

48.4(c)

30.7(R)

46.1(R)

61.4(R)

72.5(c)

190

57.15

41.0(R)

61.4(R)

81.9(R)

92.4(G)

96.7(c)

61.4(R)

87.3(G)

103(G)

118(G)

133(G)

228

95.25

41.0(R)

61.4(R)

81.9(R)

96.7(c)

61.4(R)

92.2(R)

123(R)

145(c)

266

125

41.0(R)

61.4(R)

81.9(R)

96.7(c)

61.4(R)

92.2(R)

123(R)

145(c)

266

57.15

61.4(R)

92.2(R)

123(R)

134(G)

144(G)

92.2(R)

129(G)

144(G)

159(G)

175(G)

266

62.5

61.4(R)

92.2(R)

123(R)

145(c)

92.2(R)

138(R)

156(G)

172(G)

187(G)

130

152

33.3(R)

49.9(R)

66.6(R)

73.7(g)

49.9(R)

74.9(R)

99.9(R)

111(g)

130

190

57.15

66.6(R)

99.9(R)

133(R)

147(g)

99.9(R)

142(G)

167(G)

192(G)

217(G)

130

228

95.25

66.6(R)

99.9(R)

133(R)

147(g)

99.9(R)

150(R)

200(R)

221(g)

130

266

125

66.6(R)

99.9(R)

133(R)

147(g)

99.9(R)

150(R)

200(R)

221(g)

130

266

57.15

99.9(R)

150(R)

200(R)

217(G)

221(g)

150(R)

209(G)

234(G)

259(G)

284(G)

130

266

62.5

99.9(R)

150(R)

200(R)

221(g)

150(R)

225(R)

254(G)

279(G)

304(G)

175

190

44.8(R)

67.2(R)

73.7(g)

67.2(R)

101(R)

111(g)

175

190

57.15

89.6(R)

134(R)

147(g)

134(R)

191(G)

221(g)

175

228

95.25

89.6(R)

134(R)

147(g)

134(R)

202(R)

221(g)

175

266

125

89.6(R)

134(R)

147(g)

134(R)

202(R)

221(g)

175

266

57.15

134(R)

202(R)

221(g)

202(R)

281(G)

315(G)

332(g)

175

266

62.5

134(R)

202(R)

221(g)

202(R)

302(R)

332(g)

215

266

55.0(R)

73.7(g)

82.6(R)

111(g)

215

266

57.15

110(R)

147(g)

165(R)

221(g)

215

266

95.25

110(R)

147(g)

165(R)

221(g)

215

266

125

110(R)

147(g)

165(R)

221(g)

215

266

57.15

165(R)

221(g)

248(R)

332(g)

215

266

62.5

165(R)

221(g)

248(R)

332(g)

265

342

67.8(R)

73.7(g)

102(R)

111(g)

265

342

57.15

136(R)

147(g)

204(R)

221(g)

265

342

95.25

136(R)

147(g)

204(R)

221(g)

265

342

125

136(R)

147(g)

204(R)

221(g)

265

342

57.15

204(R)

221(g)

305(R)

332(g)

265

342

62.5

204(R)

221(g)

305(R)

332(g)

315

380

73.7(g)

111(g)

315

380

57.15

147(g)

221(g)

315

380

95.25

147(g)

221(g)

315

380

125

147(g)

221(g)

315

380

57.15

221(g)

332(g)

315

380

62.5

221(g)

332(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.