1″ Bolt or dowelDouble Shear, S-P-F lumber

Selection Tables

	1″ Bolt or dowel Double Shear, S-P-F lumber
Wood Member	Fastener
Thickness (mm)	Depth (mm)	No. of rows		No. of fasteners in a row
2	3

Side, t₁	Main, t₂	Side, d₁	Main, d₂	102	152	203	254	305	102	152	203	254	305
38	38	140	140	1	0	9.73(R)	14.6(R)	19.5(R)	24.2(c)	24.2(c)	14.6(R)	21.9(R)	27.5(T)	27.5(T)	27.5(T)
38	38	235	235	2	76	16.9(G)	21.7(G)	26.6(G)	31.5(G)	36.3(G)	21.7(G)	29.0(G)	36.3(G)	37.3(T)	37.3(T)
38	38	286	286	2	127	19.5(R)	29.2(G)	34.0(G)	38.9(G)	43.5(T)	29.2(G)	36.5(G)	43.5(T)	43.5(T)	43.5(T)
38	89	140	140	1	0	12.6(R)	19.0(R)	25.3(R)	31.6(R)	37.9(R)	19.0(R)	28.5(R)	37.9(R)	47.4(R)	55.1(T)
38	89	235	235	2	76	25.3(R)	33.3(G)	39.6(G)	45.9(G)	52.2(G)	33.3(G)	42.7(G)	52.2(G)	61.7(G)	71.2(G)
38	89	286	286	2	127	25.3(R)	37.9(R)	50.6(R)	60.8(G)	67.1(G)	37.9(R)	56.9(R)	67.1(G)	76.6(G)	86.1(G)
38	140	140	140	1	0	12.6(R)	19.0(R)	25.3(R)	31.6(R)	37.9(R)	19.0(R)	28.5(R)	37.9(R)	47.4(R)	48.0(T)
38	140	235	241	2	76	25.3(R)	33.3(G)	39.6(G)	45.9(G)	52.2(G)	33.3(G)	42.7(G)	52.2(G)	59.4(T)	59.4(T)
38	140	286	292	2	127	25.3(R)	37.9(R)	50.6(R)	60.8(G)	67.1(G)	37.9(R)	56.9(R)	67.1(G)	68.7(T)	68.7(T)
89	89	140	140	1	0	22.8(R)	34.2(R)	45.6(R)	56.7(c)	56.7(c)	34.2(R)	51.3(R)	64.5(T)	64.5(T)	64.5(T)
89	89	235	235	2	76	39.5(G)	50.9(G)	62.3(G)	73.7(G)	85.1(G)	50.9(G)	68.0(G)	85.1(G)	87.3(T)	87.3(T)
89	89	286	286	2	127	45.6(R)	68.3(G)	79.7(G)	91.1(G)	102(T)	68.3(G)	85.4(G)	102(T)	102(T)	102(T)
89	140	140	140	1	0	28.7(R)	43.0(R)	48.0(T)	48.0(T)	48.0(T)	43.0(R)	48.0(T)	48.0(T)	48.0(T)	48.0(T)
89	140	235	241	2	76	39.7(G)	54.0(G)	59.4(T)	59.4(T)	59.4(T)	54.0(G)	59.4(T)	59.4(T)	59.4(T)	59.4(T)
89	140	286	292	2	127	51.1(G)	65.5(G)	68.7(T)	68.7(T)	68.7(T)	65.5(G)	68.7(T)	68.7(T)	68.7(T)	68.7(T)
89	191	140	140	1	0	29.6(R)	44.4(R)	59.2(R)	60.4(T)	60.4(T)	44.4(R)	60.4(T)	60.4(T)	60.4(T)	60.4(T)
89	191	235	241	2	76	56.1(G)	75.6(G)	91.5(T)	91.5(T)	91.5(T)	75.6(G)	91.5(T)	91.5(T)	91.5(T)	91.5(T)
89	191	286	292	2	127	59.2(R)	88.9(R)	93.8(T)	93.8(T)	93.8(T)	88.9(R)	93.8(T)	93.8(T)	93.8(T)	93.8(T)

Notes: The tabulated values are the minimum of yielding, row shear, group tear-out and net tension resistances, 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, respectively. 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) or (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. Tabulated values are based on No.1/ No.2 grade for dimension lumber (38 to 102 mm in smaller dimension) and No.2 grade for timbers (114 or more in smaller dimension). Tabulated values are based on ASTM A307 grade steel bolts or dowels. N/A = not applicable.	.	.

1″ Bolt or dowel
Double Shear, S-P-F lumber

Wood Member

Fastener

Thickness
(mm)

Depth
(mm)

No.
of
rows

No. of fasteners in a row

Side,
t₁

Main,
t₂

Side,
d₁

Main,
d₂

102

152

203

254

305

102

152

203

254

305

140

9.73(R)

14.6(R)

19.5(R)

24.2(c)

14.6(R)

21.9(R)

27.5(T)

235

16.9(G)

21.7(G)

26.6(G)

31.5(G)

36.3(G)

21.7(G)

29.0(G)

36.3(G)

37.3(T)

286

127

19.5(R)

29.2(G)

34.0(G)

38.9(G)

43.5(T)

29.2(G)

36.5(G)

43.5(T)

140

12.6(R)

19.0(R)

25.3(R)

31.6(R)

37.9(R)

19.0(R)

28.5(R)

37.9(R)

47.4(R)

55.1(T)

235

25.3(R)

33.3(G)

39.6(G)

45.9(G)

52.2(G)

33.3(G)

42.7(G)

52.2(G)

61.7(G)

71.2(G)

286

127

25.3(R)

37.9(R)

50.6(R)

60.8(G)

67.1(G)

37.9(R)

56.9(R)

67.1(G)

76.6(G)

86.1(G)

140

12.6(R)

19.0(R)

25.3(R)

31.6(R)

37.9(R)

19.0(R)

28.5(R)

37.9(R)

47.4(R)

48.0(T)

140

235

241

25.3(R)

33.3(G)

39.6(G)

45.9(G)

52.2(G)

33.3(G)

42.7(G)

52.2(G)

59.4(T)

140

286

292

127

25.3(R)

37.9(R)

50.6(R)

60.8(G)

67.1(G)

37.9(R)

56.9(R)

67.1(G)

68.7(T)

140

22.8(R)

34.2(R)

45.6(R)

56.7(c)

34.2(R)

51.3(R)

64.5(T)

235

39.5(G)

50.9(G)

62.3(G)

73.7(G)

85.1(G)

50.9(G)

68.0(G)

85.1(G)

87.3(T)

286

127

45.6(R)

68.3(G)

79.7(G)

91.1(G)

102(T)

68.3(G)

85.4(G)

102(T)

140

28.7(R)

43.0(R)

48.0(T)

43.0(R)

48.0(T)

140

235

241

39.7(G)

54.0(G)

59.4(T)

54.0(G)

59.4(T)

140

286

292

127

51.1(G)

65.5(G)

68.7(T)

65.5(G)

68.7(T)

191

140

29.6(R)

44.4(R)

59.2(R)

60.4(T)

44.4(R)

60.4(T)

191

235

241

56.1(G)

75.6(G)

91.5(T)

75.6(G)

91.5(T)

191

286

292

127

59.2(R)

88.9(R)

93.8(T)

88.9(R)

93.8(T)

Notes:

The tabulated values are the minimum of yielding, row shear, group tear-out and net tension resistances, 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, respectively.
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) or (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.
Tabulated values are based on No.1/ No.2 grade for dimension lumber (38 to 102 mm in smaller dimension) and No.2 grade for timbers (114 or more in smaller dimension).
Tabulated values are based on ASTM A307 grade steel bolts or dowels.
N/A = not applicable.