# Geometry Control for Connection Design

### Hole Size and Application

• Maximum hole sizes for bolts are given in Table 13.8 of the steel code.

• ideCAD automatically uses these values ​​for structural steel connection calculations and drawings.

### Minimum Bolt Spacing

• The distance s between the centers of standard, oversized and slotted holes should not be less than 3 times the characteristic bolt diameter d. (s ≥ 3d)

• This control is done automatically and reported in bolted connections.

### Minimum Edge Distance

• The distance from the standard hole center to the edge of the member in any direction, cannot exceed the values ​​given in Table 13.9.

• The distance from the center of the large or slotted holes to the edge cannot be less than the distance calculated by adding the value required by the standard hole diameter and the applicable C value given in Table 13.10.

• This control is done automatically and reported in bolted connections.

### Maximum Bolt Spacing and Edge Distance

• The maximum distance of the center of any bolt to the nearest edge cannot exceed 12 times the thickness of the part it connects and 150 mm.

• This control is not done automatically in connection design reports. However, in the connections calculated and created in accordance with the plastic design philosophy (for example, single plate connections, double and single angle connections, etc.), the edge distance is 2 * d with the diameter of the bolt d and the distance between the bolts is maximum 8 * d is generated.

### Weld Thickness

#### The effective thickness of partial penetration butt welds

• It cannot be less than the thickness of the weld that will ensure the transfer of the calculated force and the minimum thicknesses given in Table 13.3. The minimum weld thickness is determined on the basis of the thinner joining piece.

• This control is done automatically and reported.

#### Fillet weld effective thickness

• The minimum effective thickness of the fillet welds cannot be less than the thickness of the weld that will ensure the transfer of the calculated force and the minimum thicknesses given in Table 13.4.

• This control is done automatically and reported.

Note: The points specified in ÇYTHE 2018 13.2.2.2 for the maximum thickness of the fillet welds are not automatically controlled.

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