Structural · S-GV7NH

Utility Penetrations at Continuous Footings and Grade Beams

Materials

Concrete Reinforced Concrete Glass / Glazing

Elements

Beams Stairs Foundations / Footings Insulation Reinforcing

About this detail

Utility pipes penetrating continuous concrete footings and grade beams must be located within the middle third of the total footing depth and maintain specified clearances from reinforcing steel. Horizontal pipes require a sleeve with one inch of all-around clearance and must be wrapped in building paper or one-inch styrofoam insulation to prevent bonding, while multiple pipes require a minimum spacing of four pipe diameters on center with three inches of concrete between. Footings must be stepped as required to avoid trenches parallel to the footing below a two-to-one bearing zone, and lean-mix concrete fill is placed beneath footings at pipe trenches per geotechnical direction.

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