Selection Tables

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1″ Bolt or dowel
Double Shear, D. Fir-L lumber
Wood Member Fastener
Thickness
(mm) 		Main
member
depth
(mm)
d₂ 		No.
of
rows
140 140 140 140 140 286
1 2 3
Side,
t₁ 		Main,
t₂ 		127 152 203 254 305 102 152 203 254 305 102 152 203 254 305
38 38 140 1 0 7.70(R) 9.24(R) 12.3(R) 12.4(a) 12.4 12.4(a) 12.4 12.3(R)
38 38 235 2 76 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 19.9(G)
38 38 286 2 127 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 24.6(R) 21.5
89 89 140 1 0 12.4(a) 12.4 12.4(a) 12.4 12.4(a) 12.4 12.4(a) 12.4 12.4(a) 12.4 24.8(a) 21.5
89 89 235 2 76 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 32.1(S) 21.5
89 89 286 2 127 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 32.1(S) 21.5
140 140 140 1 0 12.4(a) 12.4 12.4(a) 12.4 12.4(a) 12.4 12.4(a) 12.4 12.4(a) 12.4 24.8(a) 21.5
140 140 241 2 76 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 32.1(S) 21.5
140 140 292 2 127 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 14.4(S) 12.4 32.1(S) 21.5
89 89 140 1 0 18.0(R) 21.6(R) 23.4(d) 23.4(d) 23.4(d) 28.9(R)
89 89 235 2 76 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 46.5(G)
89 89 286 2 127 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 57.7(R) 55.3
140 140 140 1 0 22.4(R) 23.4(d) 23.4(d) 23.4(d) 23.4(d) 35.8(R)
140 140 241 2 76 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 51.6(G)
140 140 292 2 127 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 68.1(G) 55.3
191 191 140 1 0 23.4(d) 23.4(d) 23.4(d) 23.4(d) 23.4(d) 46.7(d)
191 191 241 2 76 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 73.7(G) 55.3
191 191 292 2 127 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 33.8(S) 31.0 75.2(S) 55.3

Notes:

  1. The tabulated values are taken as the minimum of the yielding resistance, splitting resistance of the side members, and row shear, group tear-out and net tension resistances of the main member.
  2. The tabulated values are applicable when the main member is in tension. For main member in compression, the values are conservative when the failure mode is indicated as row shear (for connections with one fastener per row), group tear-out or net tension.
  3. The governing failure mode for each connection configuration is denoted by one of the following letters:
    • (a)-(g), indicating the specific yielding failure mode as per O86 Clause 12.4.4.3.2, or
    • (R), (G), (T) or (S), indicating failure due to row shear, group tear-out, net tension or splitting, respectively.
  4. When the shear resistance calculated as the summation of the side members using net section (O86 Clause 6.5.4.3) is lower than the tabulated value, the shear resistance is displayed (in kN) after the failure mode at the bottom of the cell.
  5. The minimum loaded end distance, aL, is the maximum of 50 mm and 5 times the fastener diameter (O86 Clause 12.4.3.1).
  6. For the calculation of splitting resistance of the side members, the minimum unloaded edge distance ep = 1.5 dF is assumed.
  7. For the calculation of group tear-out and net tension resistances of the main member, the fastener hole diameter is assumed to be 2 mm larger than the fastener diameter.
  8. The lateral resistance P'r is required to be adjusted to end-use conditions using modification factors depending on the governing failure mode as follows:
    • Pr = P'r (KD KSF KT) for yielding failure mode (a) or (c),
    • Pr = P'r (KDy KSF KT) for yielding failure mode (d) or (g),
    • Pr = P'r (KD KSv KT) for row shear,
    • Pr = P'r (KD KSt KT) for group tear-out or net tension,
    • Pr = P'r (KD KSF KT) for splitting.

    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.

  9. 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).

  10. Tabulated values are based on ASTM A307 grade steel bolts or dowels.
  11. N/A = not applicable.
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