Before casting a steel column base plate with a defined anchor-bolt pattern, what is the best practice to hold bolt positions until concrete sets?

Choices

• (A) One-time eyeball layout without a template
• (B) Use a fixed template or shop jig matching the pattern, check dimensions/angles, and lock against movement during pour
• (C) Pour first and drill bolts later as needed
• (D) Heat-adjust bolt locations during the pour without engineer approval