Category: Structure & materials
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
Starter bars are fixed in a footing or slab before the pour and left projecting, to lap with the bars of the next column or wall over the lap length set in design. They are tied firmly in place with stirrups so they do not move during the pour.
Why it matters on a project
Misplaced or short starters are among the most common column inspection problems. Fixing them after the pour means drilling, epoxy-anchored bars and the designer's approval.
Common mistake
Pouring the footing with column starters not tied with stirrups, so the vibrator pushes them and the column ends up off its gridline.
Frequently asked questions
What if starter bars are short?
Do not weld or extend them without the designer's approval; the fix is usually epoxy-anchored bars to a length the designer sets.
What is checked on starter bars?
Number, diameter, position on the gridline, projection length and fixing before the pour.
Related terms
- Column neck (stub column)The part of a column between the footing and ground beam level.
- Lap spliceThe overlap length of two bars that transfers force between them.
- Footings (foundations)Structural elements that transfer the building loads to the soil.
- Pre-pour checklistChecking steel, formwork and services before a pour is approved.
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