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

Selection Tables

	7/8″ Bolt or dowel Double Shear, 6 mm steel internal plates to Spruce-Pine glulam
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 distance⁴, a_L, and the spacing between bolts in a row, S_R (mm)
89	133	178	222	267	89	133	178	222	267
80	190	1	0	11.9(R)	17.8(R)	23.8(R)	29.7(R)	35.7(R)	17.8(R)	26.8(R)	35.7(R)	44.6(R)	53.5(R)
80	342	2	66.675	23.8(R)	35.7(R)	47.6(R)	59.5(R)	71.0(G)	35.7(R)	53.5(R)	71.0(G)	80.0(G)	88.9(G)
80	342	2	111.125	23.8(R)	35.7(R)	47.6(R)	59.5(R)	71.4(R)	35.7(R)	53.5(R)	71.4(R)	89.2(R)	107(R)
80	342	2	125	23.8(R)	35.7(R)	47.6(R)	59.5(R)	71.4(R)	35.7(R)	53.5(R)	71.4(R)	89.2(R)	107(R)
130	152	1	0	20.4(R)	30.6(R)	40.8(R)	51.0(R)	61.2(R)	30.6(R)	45.9(R)	61.2(R)	76.4(R)	91.7(R)
130	266	2	66.675	40.8(R)	61.2(R)	81.5(R)	102(R)	122(G)	61.2(R)	91.7(R)	122(G)	137(G)	152(G)
130	266	2	111.125	40.8(R)	61.2(R)	81.5(R)	102(R)	122(R)	61.2(R)	91.7(R)	122(R)	153(R)	183(R)
130	266	2	125	40.8(R)	61.2(R)	81.5(R)	102(R)	122(R)	61.2(R)	91.7(R)	122(R)	153(R)	183(R)
130	418	3	62.5	61.2(R)	91.7(R)	122(R)	153(R)	170(G)	91.7(R)	138(R)	170(G)	186(G)	201(G)
130	418	3	62.5	61.2(R)	91.7(R)	122(R)	153(R)	170(G)	91.7(R)	138(R)	170(G)	186(G)	201(G)
175	190	1	0	28.0(R)	42.0(R)	56.1(R)	66.7(d)	66.7(d)	42.0(R)	63.1(R)	84.1(R)	100(d)	100(d)
175	266	2	66.675	56.1(R)	84.1(R)	112(R)	133(d)	133(d)	84.1(R)	126(R)	167(G)	188(G)	200(d)
175	266	2	111.125	56.1(R)	84.1(R)	112(R)	133(d)	133(d)	84.1(R)	126(R)	168(R)	200(d)	200(d)
175	266	2	125	56.1(R)	84.1(R)	112(R)	133(d)	133(d)	84.1(R)	126(R)	168(R)	200(d)	200(d)
175	380	3	62.5	84.1(R)	126(R)	168(R)	200(d)	200(d)	126(R)	189(R)	234(G)	255(G)	276(G)
175	380	3	62.5	84.1(R)	126(R)	168(R)	200(d)	200(d)	126(R)	189(R)	234(G)	255(G)	276(G)
215	266	1	0	34.8(R)	52.2(R)	69.7(R)	71.6(d)	71.6(d)	52.2(R)	78.4(R)	104(R)	107(d)	107(d)
215	266	2	66.675	69.7(R)	104(R)	139(R)	143(d)	143(d)	104(R)	157(R)	208(G)	215(d)	215(d)
215	266	2	111.125	69.7(R)	104(R)	139(R)	143(d)	143(d)	104(R)	157(R)	209(R)	215(d)	215(d)
215	266	2	125	69.7(R)	104(R)	139(R)	143(d)	143(d)	104(R)	157(R)	209(R)	215(d)	215(d)
215	342	3	62.5	104(R)	157(R)	209(R)	215(d)	215(d)	157(R)	235(R)	291(G)	317(G)	322(d)
215	342	3	62.5	104(R)	157(R)	209(R)	215(d)	215(d)	157(R)	235(R)	291(G)	317(G)	322(d)
265	342	1	0	43.3(R)	65.0(R)	77.7(d)	77.7(d)	77.7(d)	65.0(R)	97.5(R)	117(d)	117(d)	117(d)
265	342	2	66.675	86.6(R)	130(R)	155(d)	155(d)	155(d)	130(R)	195(R)	233(d)	233(d)	233(d)
265	342	2	111.125	86.6(R)	130(R)	155(d)	155(d)	155(d)	130(R)	195(R)	233(d)	233(d)	233(d)
265	342	2	125	86.6(R)	130(R)	155(d)	155(d)	155(d)	130(R)	195(R)	233(d)	233(d)	233(d)
265	342	3	62.5	130(R)	195(R)	233(d)	233(d)	233(d)	195(R)	292(R)	350(d)	350(d)	350(d)
265	342	3	62.5	130(R)	195(R)	233(d)	233(d)	233(d)	195(R)	292(R)	350(d)	350(d)	350(d)
315	380	1	0	51.8(R)	77.7(R)	83.8(d)	83.8(d)	83.8(d)	77.7(R)	117(R)	126(d)	126(d)	126(d)
315	380	2	66.675	104(R)	155(R)	168(d)	168(d)	168(d)	155(R)	233(R)	251(d)	251(d)	251(d)
315	380	2	111.125	104(R)	155(R)	168(d)	168(d)	168(d)	155(R)	233(R)	251(d)	251(d)	251(d)
315	380	2	125	104(R)	155(R)	168(d)	168(d)	168(d)	155(R)	233(R)	251(d)	251(d)	251(d)
315	380	3	62.5	155(R)	233(R)	251(d)	251(d)	251(d)	233(R)	350(R)	377(d)	377(d)	377(d)
315	380	3	62.5	155(R)	233(R)	251(d)	251(d)	251(d)	233(R)	350(R)	377(d)	377(d)	377(d)

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 tabulated lateral resistances are based on removing a 10 mm thick slot to accommodate the 6 mm internal steel plate. 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 (K_D K_SF K_T) for yielding failure mode (a), P_r = P'_r 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, 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
Double Shear, 6 mm steel internal plates to Spruce-Pine glulam

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 distance⁴, a_L, and the spacing between bolts in a row, S_R (mm)

133

178

222

267

133

178

222

267

190

11.9(R)

17.8(R)

23.8(R)

29.7(R)

35.7(R)

17.8(R)

26.8(R)

35.7(R)

44.6(R)

53.5(R)

342

66.675

23.8(R)

35.7(R)

47.6(R)

59.5(R)

71.0(G)

35.7(R)

53.5(R)

71.0(G)

80.0(G)

88.9(G)

342

111.125

23.8(R)

35.7(R)

47.6(R)

59.5(R)

71.4(R)

35.7(R)

53.5(R)

71.4(R)

89.2(R)

107(R)

342

125

23.8(R)

35.7(R)

47.6(R)

59.5(R)

71.4(R)

35.7(R)

53.5(R)

71.4(R)

89.2(R)

107(R)

130

152

20.4(R)

30.6(R)

40.8(R)

51.0(R)

61.2(R)

30.6(R)

45.9(R)

61.2(R)

76.4(R)

91.7(R)

130

266

66.675

40.8(R)

61.2(R)

81.5(R)

102(R)

122(G)

61.2(R)

91.7(R)

122(G)

137(G)

152(G)

130

266

111.125

40.8(R)

61.2(R)

81.5(R)

102(R)

122(R)

61.2(R)

91.7(R)

122(R)

153(R)

183(R)

130

266

125

40.8(R)

61.2(R)

81.5(R)

102(R)

122(R)

61.2(R)

91.7(R)

122(R)

153(R)

183(R)

130

418

62.5

61.2(R)

91.7(R)

122(R)

153(R)

170(G)

91.7(R)

138(R)

170(G)

186(G)

201(G)

130

418

62.5

61.2(R)

91.7(R)

122(R)

153(R)

170(G)

91.7(R)

138(R)

170(G)

186(G)

201(G)

175

190

28.0(R)

42.0(R)

56.1(R)

66.7(d)

42.0(R)

63.1(R)

84.1(R)

100(d)

175

266

66.675

56.1(R)

84.1(R)

112(R)

133(d)

84.1(R)

126(R)

167(G)

188(G)

200(d)

175

266

111.125

56.1(R)

84.1(R)

112(R)

133(d)

84.1(R)

126(R)

168(R)

200(d)

175

266

125

56.1(R)

84.1(R)

112(R)

133(d)

84.1(R)

126(R)

168(R)

200(d)

175

380

62.5

84.1(R)

126(R)

168(R)

200(d)

126(R)

189(R)

234(G)

255(G)

276(G)

175

380

62.5

84.1(R)

126(R)

168(R)

200(d)

126(R)

189(R)

234(G)

255(G)

276(G)

215

266

34.8(R)

52.2(R)

69.7(R)

71.6(d)

52.2(R)

78.4(R)

104(R)

107(d)

215

266

66.675

69.7(R)

104(R)

139(R)

143(d)

104(R)

157(R)

208(G)

215(d)

215

266

111.125

69.7(R)

104(R)

139(R)

143(d)

104(R)

157(R)

209(R)

215(d)

215

266

125

69.7(R)

104(R)

139(R)

143(d)

104(R)

157(R)

209(R)

215(d)

215

342

62.5

104(R)

157(R)

209(R)

215(d)

157(R)

235(R)

291(G)

317(G)

322(d)

215

342

62.5

104(R)

157(R)

209(R)

215(d)

157(R)

235(R)

291(G)

317(G)

322(d)

265

342

43.3(R)

65.0(R)

77.7(d)

65.0(R)

97.5(R)

117(d)

265

342

66.675

86.6(R)

130(R)

155(d)

130(R)

195(R)

233(d)

265

342

111.125

86.6(R)

130(R)

155(d)

130(R)

195(R)

233(d)

265

342

125

86.6(R)

130(R)

155(d)

130(R)

195(R)

233(d)

265

342

62.5

130(R)

195(R)

233(d)

195(R)

292(R)

350(d)

265

342

62.5

130(R)

195(R)

233(d)

195(R)

292(R)

350(d)

315

380

51.8(R)

77.7(R)

83.8(d)

77.7(R)

117(R)

126(d)

315

380

66.675

104(R)

155(R)

168(d)

155(R)

233(R)

251(d)

315

380

111.125

104(R)

155(R)

168(d)

155(R)

233(R)

251(d)

315

380

125

104(R)

155(R)

168(d)

155(R)

233(R)

251(d)

315

380

62.5

155(R)

233(R)

251(d)

233(R)

350(R)

377(d)

315

380

62.5

155(R)

233(R)

251(d)

233(R)

350(R)

377(d)

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 tabulated lateral resistances are based on removing a 10 mm thick slot to accommodate the 6 mm internal steel plate.
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 (K_D K_SF K_T) for yielding failure mode (a),
- P_r = P'_r 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, 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.