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

Selection Tables

	3/4″ Bolt or dowel Double Shear, 6mm steel internal plate to D. Fir-L 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)
76	114	152	190	229	76	114	152	190	229
80	152	1	0	11.6(R)	17.5(R)	23.3(R)	29.1(R)	34.9(R)	17.5(R)	26.2(R)	34.9(R)	43.7(R)	52.4(R)
80	304	2	57.15	23.3(R)	34.9(R)	46.6(R)	58.2(R)	69.9(R)	34.9(R)	52.4(R)	69.9(R)	79.8(G)	88.5(G)
80	304	2	95.25	23.3(R)	34.9(R)	46.6(R)	58.2(R)	69.9(R)	34.9(R)	52.4(R)	69.9(R)	87.4(R)	105(R)
80	304	2	125	23.3(R)	34.9(R)	46.6(R)	58.2(R)	69.9(R)	34.9(R)	52.4(R)	69.9(R)	87.4(R)	105(R)
80	456	3	57.15	34.9(R)	52.4(R)	69.9(R)	87.4(R)	105(R)	52.4(R)	78.6(R)	105(R)	116(G)	125(G)
80	456	3	62.5	34.9(R)	52.4(R)	69.9(R)	87.4(R)	105(R)	52.4(R)	78.6(R)	105(R)	127(G)	135(G)
130	152	1	0	20.0(R)	30.0(R)	39.9(R)	49.9(R)	51.4(d)	30.0(R)	44.9(R)	59.9(R)	74.9(R)	77.1(d)
130	228	2	57.15	39.9(R)	59.9(R)	79.9(R)	99.9(R)	103(d)	59.9(R)	89.9(R)	120(R)	137(G)	152(G)
130	228	2	95.25	39.9(R)	59.9(R)	79.9(R)	99.9(R)	103(d)	59.9(R)	89.9(R)	120(R)	150(R)	154(d)
130	266	2	125	39.9(R)	59.9(R)	79.9(R)	99.9(R)	103(d)	59.9(R)	89.9(R)	120(R)	150(R)	154(d)
130	342	3	57.15	59.9(R)	89.9(R)	120(R)	150(R)	154(d)	89.9(R)	135(R)	180(R)	199(G)	214(G)
130	342	3	62.5	59.9(R)	89.9(R)	120(R)	150(R)	154(d)	89.9(R)	135(R)	180(R)	217(G)	231(d)
175	190	1	0	27.5(R)	41.2(R)	54.9(R)	56.8(d)	56.8(d)	41.2(R)	61.8(R)	82.4(R)	85.2(d)	85.2(d)
175	228	2	57.15	54.9(R)	82.4(R)	110(R)	114(d)	114(d)	82.4(R)	124(R)	165(R)	170(d)	170(d)
175	228	2	95.25	54.9(R)	82.4(R)	110(R)	114(d)	114(d)	82.4(R)	124(R)	165(R)	170(d)	170(d)
175	266	2	125	54.9(R)	82.4(R)	110(R)	114(d)	114(d)	82.4(R)	124(R)	165(R)	170(d)	170(d)
175	342	3	57.15	82.4(R)	124(R)	165(R)	170(d)	170(d)	124(R)	185(R)	247(R)	256(d)	256(d)
175	342	3	62.5	82.4(R)	124(R)	165(R)	170(d)	170(d)	124(R)	185(R)	247(R)	256(d)	256(d)
215	266	1	0	34.1(R)	51.2(R)	61.7(d)	61.7(d)	61.7(d)	51.2(R)	76.8(R)	92.5(d)	92.5(d)	92.5(d)
215	266	2	57.15	68.2(R)	102(R)	123(d)	123(d)	123(d)	102(R)	154(R)	185(d)	185(d)	185(d)
215	266	2	95.25	68.2(R)	102(R)	123(d)	123(d)	123(d)	102(R)	154(R)	185(d)	185(d)	185(d)
215	266	2	125	68.2(R)	102(R)	123(d)	123(d)	123(d)	102(R)	154(R)	185(d)	185(d)	185(d)
215	304	3	57.15	102(R)	154(R)	185(d)	185(d)	185(d)	154(R)	230(R)	277(d)	277(d)	277(d)
215	304	3	62.5	102(R)	154(R)	185(d)	185(d)	185(d)	154(R)	230(R)	277(d)	277(d)	277(d)
265	342	1	0	42.4(R)	63.7(R)	67.7(d)	67.7(d)	67.7(d)	63.7(R)	95.5(R)	102(d)	102(d)	102(d)
265	342	2	57.15	84.9(R)	127(R)	135(d)	135(d)	135(d)	127(R)	191(R)	203(d)	203(d)	203(d)
265	342	2	95.25	84.9(R)	127(R)	135(d)	135(d)	135(d)	127(R)	191(R)	203(d)	203(d)	203(d)
265	342	2	125	84.9(R)	127(R)	135(d)	135(d)	135(d)	127(R)	191(R)	203(d)	203(d)	203(d)
265	342	3	57.15	127(R)	191(R)	203(d)	203(d)	203(d)	191(R)	286(R)	305(d)	305(d)	305(d)
265	342	3	62.5	127(R)	191(R)	203(d)	203(d)	203(d)	191(R)	286(R)	305(d)	305(d)	305(d)
315	380	1	0	50.8(R)	73.7(g)	73.7(g)	73.7(g)	73.7(g)	76.1(R)	111(g)	111(g)	111(g)	111(g)
315	380	2	57.15	102(R)	147(g)	147(g)	147(g)	147(g)	152(R)	221(g)	221(g)	221(g)	221(g)
315	380	2	95.25	102(R)	147(g)	147(g)	147(g)	147(g)	152(R)	221(g)	221(g)	221(g)	221(g)
315	380	2	125	102(R)	147(g)	147(g)	147(g)	147(g)	152(R)	221(g)	221(g)	221(g)	221(g)
315	380	3	57.15	152(R)	221(g)	221(g)	221(g)	221(g)	228(R)	332(g)	332(g)	332(g)	332(g)
315	380	3	62.5	152(R)	221(g)	221(g)	221(g)	221(g)	228(R)	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 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.

3/4″ Bolt or dowel
Double Shear, 6mm steel internal plate to D. Fir-L 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)

114

152

190

229

114

152

190

229

152

11.6(R)

17.5(R)

23.3(R)

29.1(R)

34.9(R)

17.5(R)

26.2(R)

34.9(R)

43.7(R)

52.4(R)

304

57.15

23.3(R)

34.9(R)

46.6(R)

58.2(R)

69.9(R)

34.9(R)

52.4(R)

69.9(R)

79.8(G)

88.5(G)

304

95.25

23.3(R)

34.9(R)

46.6(R)

58.2(R)

69.9(R)

34.9(R)

52.4(R)

69.9(R)

87.4(R)

105(R)

304

125

23.3(R)

34.9(R)

46.6(R)

58.2(R)

69.9(R)

34.9(R)

52.4(R)

69.9(R)

87.4(R)

105(R)

456

57.15

34.9(R)

52.4(R)

69.9(R)

87.4(R)

105(R)

52.4(R)

78.6(R)

105(R)

116(G)

125(G)

456

62.5

34.9(R)

52.4(R)

69.9(R)

87.4(R)

105(R)

52.4(R)

78.6(R)

105(R)

127(G)

135(G)

130

152

20.0(R)

30.0(R)

39.9(R)

49.9(R)

51.4(d)

30.0(R)

44.9(R)

59.9(R)

74.9(R)

77.1(d)

130

228

57.15

39.9(R)

59.9(R)

79.9(R)

99.9(R)

103(d)

59.9(R)

89.9(R)

120(R)

137(G)

152(G)

130

228

95.25

39.9(R)

59.9(R)

79.9(R)

99.9(R)

103(d)

59.9(R)

89.9(R)

120(R)

150(R)

154(d)

130

266

125

39.9(R)

59.9(R)

79.9(R)

99.9(R)

103(d)

59.9(R)

89.9(R)

120(R)

150(R)

154(d)

130

342

57.15

59.9(R)

89.9(R)

120(R)

150(R)

154(d)

89.9(R)

135(R)

180(R)

199(G)

214(G)

130

342

62.5

59.9(R)

89.9(R)

120(R)

150(R)

154(d)

89.9(R)

135(R)

180(R)

217(G)

231(d)

175

190

27.5(R)

41.2(R)

54.9(R)

56.8(d)

41.2(R)

61.8(R)

82.4(R)

85.2(d)

175

228

57.15

54.9(R)

82.4(R)

110(R)

114(d)

82.4(R)

124(R)

165(R)

170(d)

175

228

95.25

54.9(R)

82.4(R)

110(R)

114(d)

82.4(R)

124(R)

165(R)

170(d)

175

266

125

54.9(R)

82.4(R)

110(R)

114(d)

82.4(R)

124(R)

165(R)

170(d)

175

342

57.15

82.4(R)

124(R)

165(R)

170(d)

124(R)

185(R)

247(R)

256(d)

175

342

62.5

82.4(R)

124(R)

165(R)

170(d)

124(R)

185(R)

247(R)

256(d)

215

266

34.1(R)

51.2(R)

61.7(d)

51.2(R)

76.8(R)

92.5(d)

215

266

57.15

68.2(R)

102(R)

123(d)

102(R)

154(R)

185(d)

215

266

95.25

68.2(R)

102(R)

123(d)

102(R)

154(R)

185(d)

215

266

125

68.2(R)

102(R)

123(d)

102(R)

154(R)

185(d)

215

304

57.15

102(R)

154(R)

185(d)

154(R)

230(R)

277(d)

215

304

62.5

102(R)

154(R)

185(d)

154(R)

230(R)

277(d)

265

342

42.4(R)

63.7(R)

67.7(d)

63.7(R)

95.5(R)

102(d)

265

342

57.15

84.9(R)

127(R)

135(d)

127(R)

191(R)

203(d)

265

342

95.25

84.9(R)

127(R)

135(d)

127(R)

191(R)

203(d)

265

342

125

84.9(R)

127(R)

135(d)

127(R)

191(R)

203(d)

265

342

57.15

127(R)

191(R)

203(d)

191(R)

286(R)

305(d)

265

342

62.5

127(R)

191(R)

203(d)

191(R)

286(R)

305(d)

315

380

50.8(R)

73.7(g)

76.1(R)

111(g)

315

380

57.15

102(R)

147(g)

152(R)

221(g)

315

380

95.25

102(R)

147(g)

152(R)

221(g)

315

380

125

102(R)

147(g)

152(R)

221(g)

315

380

57.15

152(R)

221(g)

228(R)

332(g)

315

380

62.5

152(R)

221(g)

228(R)

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 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.