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Hole Size and Applications
Maximum hole sizes of holes for bolts are given in AISC 360-16 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 Standard (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 |
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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 oversized, or slotted holes of 3d 3D is preferred. (s ≥ 3d)
This control is done automatically and reported in bolted connections.
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The distance from the standard hole diameter center to the edge of the element, in any direction, cannot exceed the values given in AISC 360-16 Table J3.4.
The distance from the center of the large or slotted hole to the connected part edge cannot be less than that required for a standard hole to an edge of a connected part plus the applicable increment, C2, from AISC 360-16 Table J3.5.
This control is done automatically and reported in bolted connections.
TABLE J3.4M | |
|---|---|
Bolt Diameter, mm | Minimum Edge Distance |
M16 | 22 |
M20 | 26 |
M22 | 28 |
M24 | 30 |
M27 | 34 |
M30 | 38 |
M36 | 48 |
≥ M36 | 1.25d |
TABLE J3.5M | ||||
|---|---|---|---|---|
Nominal Diameter of Fastener | Oversized Holes | Slotted Holes | ||
Long Axis Perpendicular to Edge | Long Axis Parallel to Edge | |||
Short Slots | Long Slots | |||
≤ 22 | 2 | 3 | 0.75d | 0 |
24 | 3 | 3 | ||
≥ 27 | 3 | 5 | ||
Maximum Bolt Spacing and Distance to Edge
The maximum distance of the center of any bolt to the nearest edge cannot exceed 12 times the thickness of the part it connects or 150 mm.
This control is not done automatically by the programmeideCAD Structural. However, in the joints calculated and created in accordance with by the plastic design philosophy (for example, single slip plate joints, double and single angle joints, etc.), the edge distance is 2*d, with the diameter of the bolt d, the distance between the bolts is maximum 8. *d is generated.
Welding Thickness
The
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Effective Thickness of Partial Penetration Groove Welds
The minimum effective throat of a partial-joint-penetration groove weld cannot be less than the thickness of the weld that , which will ensure the safe transfer of the calculated force nor and the size given in AISC 360-16 Table J2.3. Minimum weld size is determined by the thinner of the two parts joined.
This check is done automatically and reported.
Fillet
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Welds Effective Thickness
The minimum size of fillet welds shall be not less than the size required to transmit forces , nor the size as shown in AISC 360-16 Table J2.4.
This check is done automatically and reported.
Note: The points specified in AISC 360-16 J2b.2 for the maximum thickness of the filled welds are not automatically checked.
TABLE J2.3 Minimum Effective Throat of Partial-Joint-Penetration Groove Welds | |
|---|---|
Material Thickness of Thinner Part Joined, mm | Minimum Effective Throat, mm |
To 6 inclusive | 3 |
Over 6 to 13 | 5 |
Over 13 to 19 | 6 |
Over 19 to 38 | 8 |
Over 38 to 57 | 10 |
Over 57 to 150 | 13 |
Over 150 | 16 |
TABLE J2.4 | |
|---|---|
Material Thickness of Thinner Part Joined, mm | Minimum Effective Throat, mm |
To 6 inclusive | 3 |
Over 6 to 13 | 5 |
Over 13 to 19 | 6 |
Over 19 | 8 |
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