thumb|Two bundles of full-length rebar, which will be placed, bent, or cut as required by installation
thumb|Two bundles of full-length rebar, which will be placed, bent, or cut as required by installation
Rebar (short for reinforcement bar or reinforcing bar), known when massed as reinforcing steel or steel reinforcement, is a tension device added to concrete to form reinforced concrete and reinforced masonry structures to strengthen and aid the concrete under tension. Concrete is strong under compression, but has low tensile strength. Rebar usually consists of steel bars which significantly increase the tensile strength of the structure. Rebar surfaces feature a continuous series of ribs, lugs or indentations to promote a better bond with the concrete and reduce the risk of slippage.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).