Connection design geometry checks such as hole size, minimum and maximum bolt spacing, bolt edge distance, and weld thickness are explained in detail under this title.
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Hole Size and Applications
Maximum hole sizes for bolts are given in Table J3.3 of the steel code.
ideCAD automatically uses these values for the design of steel connections and drawings.
TABLE J3.3M | ||||
|---|---|---|---|---|
Bolt Diameter, mm | Hole Dimensions | |||
Standart (Dia.) | Oversize (Dia.) | Short-Slot | Long-Slot | |
M16 | 18 | 20 | 18 x 22 | 18 x 40 |
M20 | 22 | 24 | 22 x 36 | 22 x 50 |
M22 | 24 | 28 | 24 x 30 | 24 x 55 |
M24 | 27 | 30 | 27 x 32 | 27 x 60 |
M27 | 30 | 35 | 30 x 37 | 30 x 67 |
M30 | 33 | 38 | 30 x 40 | 33 x 75 |
≥ M36 | d+3 | d+8 | (d + 3) × (d + 10) | (d + 3) × 2.5d |
Minimum Spacing
The distance between the centers of standard, large, and slot holes, s, is not less than 22/3 times the nominal diameter, d, of the fastener. According to AISC 360-16, the distance between centers of standard, oversize or slotted holes of 3d is preferred. (s ≥ 3d)
This control is done automatically and reported in bolted connections.
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