X-Y coordinates for every bolt on a circle — from bolt count, bolt circle diameter, and start angle — plus the angle between bolts and the chord length for field layout.
X = (BCD/2)·cosθ, Y = (BCD/2)·sinθ, θ = start + i·(360/N), from center (0,0). Chord = BCD·sin(180/N). Layout aid.
Verify with project engineer, contract documents, and applicable code/specification. Estimating aid only — not a design tool, not legal advice.
A copy-ready RFI or worksheet, a calculator or SDS2 template, and directory updates. No filler, unsubscribe anytime.