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

Selection Tables

	5/8″ 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)
64	95	127	159	190	64	95	127	159	190
80	152	1	0	9.71(R)	14.6(R)	19.4(R)	24.3(R)	29.1(R)	14.6(R)	21.8(R)	29.1(R)	36.4(R)	43.7(R)
80	266	2	47.625	19.4(R)	29.1(R)	38.8(R)	48.5(R)	58.2(R)	29.1(R)	43.7(R)	58.2(R)	66.1(G)	73.4(G)
80	266	2	79.375	19.4(R)	29.1(R)	38.8(R)	48.5(R)	58.2(R)	29.1(R)	43.7(R)	58.2(R)	72.8(R)	87.4(R)
80	266	2	111.125	19.4(R)	29.1(R)	38.8(R)	48.5(R)	58.2(R)	29.1(R)	43.7(R)	58.2(R)	72.8(R)	87.4(R)
80	380	3	47.625	29.1(R)	43.7(R)	58.2(R)	72.8(R)	87.4(R)	43.7(R)	65.5(R)	87.4(R)	95.9(G)	103(G)
80	380	3	62.5	29.1(R)	43.7(R)	58.2(R)	72.8(R)	87.4(R)	43.7(R)	65.5(R)	87.4(R)	109(R)	131(R)
130	152	1	0	16.6(R)	25.0(R)	33.3(R)	38.7(d)	38.7(d)	25.0(R)	37.4(R)	49.9(R)	58.0(d)	58.0(d)
130	228	2	47.625	33.3(R)	49.9(R)	66.6(R)	77.3(d)	77.3(d)	49.9(R)	74.9(R)	99.9(R)	113(G)	116(d)
130	228	2	79.375	33.3(R)	49.9(R)	66.6(R)	77.3(d)	77.3(d)	49.9(R)	74.9(R)	99.9(R)	116(d)	116(d)
130	228	2	111.125	33.3(R)	49.9(R)	66.6(R)	77.3(d)	77.3(d)	49.9(R)	74.9(R)	99.9(R)	116(d)	116(d)
130	304	3	47.625	49.9(R)	74.9(R)	99.9(R)	116(d)	116(d)	74.9(R)	112(R)	150(R)	164(G)	174(d)
130	304	3	62.5	49.9(R)	74.9(R)	99.9(R)	116(d)	116(d)	74.9(R)	112(R)	150(R)	174(d)	174(d)
175	190	1	0	22.9(R)	34.3(R)	43.4(d)	43.4(d)	43.4(d)	34.3(R)	51.5(R)	65.1(d)	65.1(d)	65.1(d)
175	190	2	47.625	45.8(R)	68.6(R)	86.7(d)	86.7(d)	86.7(d)	68.6(R)	103(R)	130(d)	130(d)	130(d)
175	190	2	79.375	45.8(R)	68.6(R)	86.7(d)	86.7(d)	86.7(d)	68.6(R)	103(R)	130(d)	130(d)	130(d)
175	228	2	111.125	45.8(R)	68.6(R)	86.7(d)	86.7(d)	86.7(d)	68.6(R)	103(R)	130(d)	130(d)	130(d)
175	266	3	47.625	68.6(R)	103(R)	130(d)	130(d)	130(d)	103(R)	154(R)	195(d)	195(d)	195(d)
175	266	3	62.5	68.6(R)	103(R)	130(d)	130(d)	130(d)	103(R)	154(R)	195(d)	195(d)	195(d)
215	266	1	0	28.4(R)	42.6(R)	47.6(d)	47.6(d)	47.6(d)	42.6(R)	64.0(R)	71.3(d)	71.3(d)	71.3(d)
215	266	2	47.625	56.9(R)	85.3(R)	95.1(d)	95.1(d)	95.1(d)	85.3(R)	128(R)	143(d)	143(d)	143(d)
215	266	2	79.375	56.9(R)	85.3(R)	95.1(d)	95.1(d)	95.1(d)	85.3(R)	128(R)	143(d)	143(d)	143(d)
215	266	2	111.125	56.9(R)	85.3(R)	95.1(d)	95.1(d)	95.1(d)	85.3(R)	128(R)	143(d)	143(d)	143(d)
215	266	3	47.625	85.3(R)	128(R)	143(d)	143(d)	143(d)	128(R)	192(R)	214(d)	214(d)	214(d)
215	266	3	62.5	85.3(R)	128(R)	143(d)	143(d)	143(d)	128(R)	192(R)	214(d)	214(d)	214(d)
265	342	1	0	35.4(R)	52.2(g)	52.2(g)	52.2(g)	52.2(g)	53.0(R)	78.3(g)	78.3(g)	78.3(g)	78.3(g)
265	342	2	47.625	70.7(R)	104(g)	104(g)	104(g)	104(g)	106(R)	157(g)	157(g)	157(g)	157(g)
265	342	2	79.375	70.7(R)	104(g)	104(g)	104(g)	104(g)	106(R)	157(g)	157(g)	157(g)	157(g)
265	342	2	111.125	70.7(R)	104(g)	104(g)	104(g)	104(g)	106(R)	157(g)	157(g)	157(g)	157(g)
265	342	3	47.625	106(R)	157(g)	157(g)	157(g)	157(g)	159(R)	235(g)	235(g)	235(g)	235(g)
265	342	3	62.5	106(R)	157(g)	157(g)	157(g)	157(g)	159(R)	235(g)	235(g)	235(g)	235(g)
315	380	1	0	42.3(R)	52.2(g)	52.2(g)	52.2(g)	52.2(g)	63.4(R)	78.3(g)	78.3(g)	78.3(g)	78.3(g)
315	380	2	47.625	84.6(R)	104(g)	104(g)	104(g)	104(g)	127(R)	157(g)	157(g)	157(g)	157(g)
315	380	2	79.375	84.6(R)	104(g)	104(g)	104(g)	104(g)	127(R)	157(g)	157(g)	157(g)	157(g)
315	380	2	111.125	84.6(R)	104(g)	104(g)	104(g)	104(g)	127(R)	157(g)	157(g)	157(g)	157(g)
315	380	3	47.625	127(R)	157(g)	157(g)	157(g)	157(g)	190(R)	235(g)	235(g)	235(g)	235(g)
315	380	3	62.5	127(R)	157(g)	157(g)	157(g)	157(g)	190(R)	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 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.

5/8″ 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)

127

159

190

127

159

190

152

9.71(R)

14.6(R)

19.4(R)

24.3(R)

29.1(R)

14.6(R)

21.8(R)

29.1(R)

36.4(R)

43.7(R)

266

47.625

19.4(R)

29.1(R)

38.8(R)

48.5(R)

58.2(R)

29.1(R)

43.7(R)

58.2(R)

66.1(G)

73.4(G)

266

79.375

19.4(R)

29.1(R)

38.8(R)

48.5(R)

58.2(R)

29.1(R)

43.7(R)

58.2(R)

72.8(R)

87.4(R)

266

111.125

19.4(R)

29.1(R)

38.8(R)

48.5(R)

58.2(R)

29.1(R)

43.7(R)

58.2(R)

72.8(R)

87.4(R)

380

47.625

29.1(R)

43.7(R)

58.2(R)

72.8(R)

87.4(R)

43.7(R)

65.5(R)

87.4(R)

95.9(G)

103(G)

380

62.5

29.1(R)

43.7(R)

58.2(R)

72.8(R)

87.4(R)

43.7(R)

65.5(R)

87.4(R)

109(R)

131(R)

130

152

16.6(R)

25.0(R)

33.3(R)

38.7(d)

25.0(R)

37.4(R)

49.9(R)

58.0(d)

130

228

47.625

33.3(R)

49.9(R)

66.6(R)

77.3(d)

49.9(R)

74.9(R)

99.9(R)

113(G)

116(d)

130

228

79.375

33.3(R)

49.9(R)

66.6(R)

77.3(d)

49.9(R)

74.9(R)

99.9(R)

116(d)

130

228

111.125

33.3(R)

49.9(R)

66.6(R)

77.3(d)

49.9(R)

74.9(R)

99.9(R)

116(d)

130

304

47.625

49.9(R)

74.9(R)

99.9(R)

116(d)

74.9(R)

112(R)

150(R)

164(G)

174(d)

130

304

62.5

49.9(R)

74.9(R)

99.9(R)

116(d)

74.9(R)

112(R)

150(R)

174(d)

175

190

22.9(R)

34.3(R)

43.4(d)

34.3(R)

51.5(R)

65.1(d)

175

190

47.625

45.8(R)

68.6(R)

86.7(d)

68.6(R)

103(R)

130(d)

175

190

79.375

45.8(R)

68.6(R)

86.7(d)

68.6(R)

103(R)

130(d)

175

228

111.125

45.8(R)

68.6(R)

86.7(d)

68.6(R)

103(R)

130(d)

175

266

47.625

68.6(R)

103(R)

130(d)

103(R)

154(R)

195(d)

175

266

62.5

68.6(R)

103(R)

130(d)

103(R)

154(R)

195(d)

215

266

28.4(R)

42.6(R)

47.6(d)

42.6(R)

64.0(R)

71.3(d)

215

266

47.625

56.9(R)

85.3(R)

95.1(d)

85.3(R)

128(R)

143(d)

215

266

79.375

56.9(R)

85.3(R)

95.1(d)

85.3(R)

128(R)

143(d)

215

266

111.125

56.9(R)

85.3(R)

95.1(d)

85.3(R)

128(R)

143(d)

215

266

47.625

85.3(R)

128(R)

143(d)

128(R)

192(R)

214(d)

215

266

62.5

85.3(R)

128(R)

143(d)

128(R)

192(R)

214(d)

265

342

35.4(R)

52.2(g)

53.0(R)

78.3(g)

265

342

47.625

70.7(R)

104(g)

106(R)

157(g)

265

342

79.375

70.7(R)

104(g)

106(R)

157(g)

265

342

111.125

70.7(R)

104(g)

106(R)

157(g)

265

342

47.625

106(R)

157(g)

159(R)

235(g)

265

342

62.5

106(R)

157(g)

159(R)

235(g)

315

380

42.3(R)

52.2(g)

63.4(R)

78.3(g)

315

380

47.625

84.6(R)

104(g)

127(R)

157(g)

315

380

79.375

84.6(R)

104(g)

127(R)

157(g)

315

380

111.125

84.6(R)

104(g)

127(R)

157(g)

315

380

47.625

127(R)

157(g)

190(R)

235(g)

315

380

62.5

127(R)

157(g)

190(R)

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 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.