Sand ballasting (anchor bolt cage) is prefabricated hot-dip galvanized rebar assembly for concrete foundations. It secures anchor bolts accurately during pouring, prevents displacement, delivers stable load transfer for light poles, steel structures and infrastructure.
Sand ballasting, also referred to as anchor bolt cage or foundation rebar cage, is a prefabricated steel assembly made of anchor bolts, anchor plates and reinforcing steel bars. All components are pre-welded into an integrated cage structure, which will be embedded into concrete foundations for light poles, sign posts, steel buildings and other infrastructure projects.
This pre-assembled cage fixes all anchor bolts at the exact designed position before concrete pouring. It greatly avoids bolt shifting and alignment errors during concrete casting, solving a common pain point in on-site foundation construction.
Most sand ballasting products are hot-dip galvanized for superior corrosion resistance. This surface treatment protects the steel from rust in wet, coastal or harsh outdoor conditions, and significantly extends the service lifespan of the whole foundation system.
By adopting this prefabricated unit, contractors can cut on-site working time, improve foundation precision, and ensure reliable load transfer between the concrete base and the upper metal structures.