5/8″ Bolt or dowelDouble Shear, D. Fir-L glulam to 6mm steel plates

Selection Tables

	5/8″ 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)
64	95	127	159	190	64	95	127	159	190
80	114	1	0	0	17.1(R)	25.6(R)	34.1(R)	41.9(c)	41.9(c)	25.6(R)	38.4(R)	51.2(R)	62.8(c)	62.8(c)
80	152	2	47.625	47.625	34.1(R)	51.2(R)	68.1(G)	76.7(G)	83.8(c)	51.2(R)	72.4(G)	85.2(G)	98.0(G)	111(G)
80	190	2	79.375	79.375	34.1(R)	51.2(R)	68.3(R)	83.8(c)	83.8(c)	51.2(R)	76.8(R)	102(R)	126(c)	126(c)
80	228	2	111.125	111.125	34.1(R)	51.2(R)	68.3(R)	83.8(c)	83.8(c)	51.2(R)	76.8(R)	102(R)	126(c)	126(c)
80	228	3	47.625	47.625	51.2(R)	76.8(R)	102(G)	111(G)	119(G)	76.8(R)	106(G)	119(G)	132(G)	145(G)
80	228	3	62.5	62.5	51.2(R)	76.8(R)	102(R)	126(c)	126(c)	76.8(R)	115(R)	153(G)	166(G)	179(G)
130	152	1	0	0	27.7(R)	41.6(R)	52.2(g)	52.2(g)	52.2(g)	41.6(R)	62.4(R)	78.3(g)	78.3(g)	78.3(g)
130	152	2	47.625	47.625	55.5(R)	83.2(R)	104(g)	104(g)	104(g)	83.2(R)	118(G)	138(G)	157(g)	157(g)
130	190	2	79.375	79.375	55.5(R)	83.2(R)	104(g)	104(g)	104(g)	83.2(R)	125(R)	157(g)	157(g)	157(g)
130	228	2	111.125	111.125	55.5(R)	83.2(R)	104(g)	104(g)	104(g)	83.2(R)	125(R)	157(g)	157(g)	157(g)
130	228	3	47.625	47.625	83.2(R)	125(R)	157(g)	157(g)	157(g)	125(R)	173(G)	194(G)	214(G)	235(g)
130	228	3	62.5	62.5	83.2(R)	125(R)	157(g)	157(g)	157(g)	125(R)	187(R)	235(g)	235(g)	235(g)
175	190	1	0	0	37.3(R)	52.2(g)	52.2(g)	52.2(g)	52.2(g)	56.0(R)	78.3(g)	78.3(g)	78.3(g)	78.3(g)
175	190	2	47.625	47.625	74.7(R)	104(g)	104(g)	104(g)	104(g)	112(R)	157(g)	157(g)	157(g)	157(g)
175	190	2	79.375	79.375	74.7(R)	104(g)	104(g)	104(g)	104(g)	112(R)	157(g)	157(g)	157(g)	157(g)
175	228	2	111.125	111.125	74.7(R)	104(g)	104(g)	104(g)	104(g)	112(R)	157(g)	157(g)	157(g)	157(g)
175	228	3	47.625	47.625	112(R)	157(g)	157(g)	157(g)	157(g)	168(R)	233(G)	235(g)	235(g)	235(g)
175	228	3	62.5	62.5	112(R)	157(g)	157(g)	157(g)	157(g)	168(R)	235(g)	235(g)	235(g)	235(g)
215	266	1	0	0	45.9(R)	52.2(g)	52.2(g)	52.2(g)	52.2(g)	68.8(R)	78.3(g)	78.3(g)	78.3(g)	78.3(g)
215	266	2	47.625	47.625	91.7(R)	104(g)	104(g)	104(g)	104(g)	138(R)	157(g)	157(g)	157(g)	157(g)
215	266	2	79.375	79.375	91.7(R)	104(g)	104(g)	104(g)	104(g)	138(R)	157(g)	157(g)	157(g)	157(g)
215	266	2	111.125	111.125	91.7(R)	104(g)	104(g)	104(g)	104(g)	138(R)	157(g)	157(g)	157(g)	157(g)
215	266	3	47.625	47.625	138(R)	157(g)	157(g)	157(g)	157(g)	206(R)	235(g)	235(g)	235(g)	235(g)
215	266	3	62.5	62.5	138(R)	157(g)	157(g)	157(g)	157(g)	206(R)	235(g)	235(g)	235(g)	235(g)
265	342	1	0	0	52.2(g)	52.2(g)	52.2(g)	52.2(g)	52.2(g)	78.3(g)	78.3(g)	78.3(g)	78.3(g)	78.3(g)
265	342	2	47.625	47.625	104(g)	104(g)	104(g)	104(g)	104(g)	157(g)	157(g)	157(g)	157(g)	157(g)
265	342	2	79.375	79.375	104(g)	104(g)	104(g)	104(g)	104(g)	157(g)	157(g)	157(g)	157(g)	157(g)
265	342	2	111.125	111.125	104(g)	104(g)	104(g)	104(g)	104(g)	157(g)	157(g)	157(g)	157(g)	157(g)
265	342	3	47.625	47.625	157(g)	157(g)	157(g)	157(g)	157(g)	235(g)	235(g)	235(g)	235(g)	235(g)
265	342	3	62.5	62.5	157(g)	157(g)	157(g)	157(g)	157(g)	235(g)	235(g)	235(g)	235(g)	235(g)
315	380	1	0	0	52.2(g)	52.2(g)	52.2(g)	52.2(g)	52.2(g)	78.3(g)	78.3(g)	78.3(g)	78.3(g)	78.3(g)
315	380	2	47.625	47.625	104(g)	104(g)	104(g)	104(g)	104(g)	157(g)	157(g)	157(g)	157(g)	157(g)
315	380	2	79.375	79.375	104(g)	104(g)	104(g)	104(g)	104(g)	157(g)	157(g)	157(g)	157(g)	157(g)
315	380	2	111.125	111.125	104(g)	104(g)	104(g)	104(g)	104(g)	157(g)	157(g)	157(g)	157(g)	157(g)
315	380	3	47.625	47.625	157(g)	157(g)	157(g)	157(g)	157(g)	235(g)	235(g)	235(g)	235(g)	235(g)
315	380	3	62.5	62.5	157(g)	157(g)	157(g)	157(g)	157(g)	235(g)	235(g)	235(g)	235(g)	235(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.	.

5/8″ 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)

127

159

190

127

159

190

114

17.1(R)

25.6(R)

34.1(R)

41.9(c)

25.6(R)

38.4(R)

51.2(R)

62.8(c)

152

47.625

34.1(R)

51.2(R)

68.1(G)

76.7(G)

83.8(c)

51.2(R)

72.4(G)

85.2(G)

98.0(G)

111(G)

190

79.375

34.1(R)

51.2(R)

68.3(R)

83.8(c)

51.2(R)

76.8(R)

102(R)

126(c)

228

111.125

34.1(R)

51.2(R)

68.3(R)

83.8(c)

51.2(R)

76.8(R)

102(R)

126(c)

228

47.625

51.2(R)

76.8(R)

102(G)

111(G)

119(G)

76.8(R)

106(G)

119(G)

132(G)

145(G)

228

62.5

51.2(R)

76.8(R)

102(R)

126(c)

76.8(R)

115(R)

153(G)

166(G)

179(G)

130

152

27.7(R)

41.6(R)

52.2(g)

41.6(R)

62.4(R)

78.3(g)

130

152

47.625

55.5(R)

83.2(R)

104(g)

83.2(R)

118(G)

138(G)

157(g)

130

190

79.375

55.5(R)

83.2(R)

104(g)

83.2(R)

125(R)

157(g)

130

228

111.125

55.5(R)

83.2(R)

104(g)

83.2(R)

125(R)

157(g)

130

228

47.625

83.2(R)

125(R)

157(g)

125(R)

173(G)

194(G)

214(G)

235(g)

130

228

62.5

83.2(R)

125(R)

157(g)

125(R)

187(R)

235(g)

175

190

37.3(R)

52.2(g)

56.0(R)

78.3(g)

175

190

47.625

74.7(R)

104(g)

112(R)

157(g)

175

190

79.375

74.7(R)

104(g)

112(R)

157(g)

175

228

111.125

74.7(R)

104(g)

112(R)

157(g)

175

228

47.625

112(R)

157(g)

168(R)

233(G)

235(g)

175

228

62.5

112(R)

157(g)

168(R)

235(g)

215

266

45.9(R)

52.2(g)

68.8(R)

78.3(g)

215

266

47.625

91.7(R)

104(g)

138(R)

157(g)

215

266

79.375

91.7(R)

104(g)

138(R)

157(g)

215

266

111.125

91.7(R)

104(g)

138(R)

157(g)

215

266

47.625

138(R)

157(g)

206(R)

235(g)

215

266

62.5

138(R)

157(g)

206(R)

235(g)

265

342

52.2(g)

78.3(g)

265

342

47.625

104(g)

157(g)

265

342

79.375

104(g)

157(g)

265

342

111.125

104(g)

157(g)

265

342

47.625

157(g)

235(g)

265

342

62.5

157(g)

235(g)

315

380

52.2(g)

78.3(g)

315

380

47.625

104(g)

157(g)

315

380

79.375

104(g)

157(g)

315

380

111.125

104(g)

157(g)

315

380

47.625

157(g)

235(g)

315

380

62.5

157(g)

235(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.