BlueCollarSteel density
Use about 490 lb/ft³ for carbon-steel field estimates.
IRONWORKERS
Ironworker
Structural steel, bolt and layout math. Use the tabs below to switch between working calculators and quick field-reference material.
Field-reference aid. Use approved drawings, current codes/standards, manufacturer data and job-specific procedures for final decisions—especially for lifting, electrical, pressure, fire-protection and life-safety work.
Bolt circles
Equal bolt spacing angle = 360° ÷ number of holes.
Diagonal check
For square/rectangular layout, diagonal = √(length² + width²). Equal diagonals help confirm squareness.
Erection work
Connection details, bolt installation and structural requirements come from the drawings, specifications and governing standards.
Need a specific table or takeoff chart?
Send us what you use in the field and we can build it into this trade section.
Suggest reference data