This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Relating to or being a structural member, especially of concrete, that has been cast into form before being transported to its site of installation.

adj. 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.

adj. of structural members especially of concrete; cast into form before being transported to the site of installation

"Construction will be much easier if the lintels are "precast": that is, made in advance and then placed in the wall like a brick."

formed   

cast    place    in   

precasting    precasts   

Nast    aghast    amassed    asked    ast    bast    blast    cast    caste    classed   

solutions.this    atom-laser    thermo-dump    century    fresh-scrubbed    towerlike    iphone-like    well-finished    chrome steel    gigantesque