Shop drawing of combined footing

Combined footings are used when two or more columns are placed close to each other, making it impractical to provide separate isolated footings—particularly near property boundaries. In this case, a single footing is designed to support multiple columns and distribute the loads efficiently.

The shop drawing work for a combined footing includes:

Footing Dimensions:

Specifies the overall length, width, and thickness of the footing based on applied loads and soil conditions.

Column Positioning:

Shows the exact location of each column on the footing, with distances measured accurately from the edges and between columns.

Reinforcement Details:

Bottom Reinforcement: Bar diameters, spacing, number of bars, and direction (longitudinal and transverse).

Top Reinforcement (if required): Especially in cases of eccentric or high moment loads.

Additional reinforcement around column zones and diagonal bars if necessary.

Lap Lengths and Anchorage:

Details of steel bar overlaps, anchorage between column dowels and footing reinforcement.

Bar Bending Schedule (BBS):

Includes exact lengths, quantities, bar diameters, and unique codes for easy site installation.

Sectional Views:

Cross-sectional drawings that illustrate footing thickness, bar layering, and reinforcement arrangement.