Structural · S-V48SP

Typical Gravity Column Base

Materials

Concrete Steel Masonry / CMU

Elements

Columns Foundations / Footings Anchors / Embeds Connections / Plates

Connections

Base Plate / Anchorage Welded Connection

About this detail

A typical gravity column base connection for structural steel wide-flange columns rests on a concrete foundation. The supported column, sized per structural plans as a W10, W12, W14, or W16 section, transfers loads through a steel base plate secured by three-quarter-inch-diameter anchor rods. The assembly incorporates optional leveling nuts, double nuts or headed anchor rods with a two-inch minimum projection above the nut, and one-half-by-two-by-two-inch plate washers with standard holes matching the one-and-five-sixteenth-inch diameter holes in the base plate. A one-and-one-half-inch layer of non-shrink grout fills the space beneath the base plate, with a maximum half-inch thickness subject to schedule. General notes permit all-around welds as an alternative and outline embedment depth requirements as the greater of nine inches or eight times the anchor rod diameter, subject to adjustment for three inches of clear cover at footings, alongside provisions for optional two-inch-diameter grout holes on wider base plates.

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