Ready-made, as concrete

• Like a concrete slab that's made off-site
• Like some concrete slabs
• Formed off-site
• Like concrete that's shaped in advance
• Formed before delivery, as concrete
• Like ready-made concrete pieces
• Dire rep players "like concrete blocks"

Wiktionary Word definitions in Wiktionary
cast previously in another location. n. Structural members made of concrete, ready for installation. v To cast in a location other than where to be installed.

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
adjective EXAMPLES FROM CORPUS ▪ Crisp precast concrete slabs are teamed with brick, the latter helping to soften the overall surface. ▪ Most popular are precast concrete paviours and slabs, but look around for the more interesting surface textures and ...