Mark Drill Hole Locations

Concern:

Trades that follow the placement of a floor slab with post-tensioned (PT) concrete may have to drill into the slab to secure their work. It is hard to know the exact location of the PT cable (depth and x-y position in slab) but drilling into it is dangerous: it could cause the cable to snap and jeopardize the structure’s performance.

Countermeasure:

Blue Bangers are inserts positioned in-between PT cables and then nailed to the slab formwork prior to placing concrete. They are visible from underneath the slab when the formwork has been stripped and mark spots where it is OK to drill.

Limitation: