Structural Shapes - Nucor-Yamato Steel

Rolling Practice and Rolling Tolerances Universal mills are used for
rolling W, S, C, MC, S, L and HP shapes. The thickness of the flange and the web may be
changed with corresponding changes in the beam depth and flange width. The thickness of the
web may be changed with a corresponding change in the flange width. All other dimensions
remain unchanged.
In the production of structural shapes, the dimensions and weights may vary slightly from the
published nominal figures. However, they remain within the permissible tolerance.
Roll wear may also slightly affect the radii of fillets and rounded edges. So please make proper
allowances for fittings and connections.
Roll wear, along with deformation in the mill and the plasticity of hot steel may also cause
variations from the published dimensions of rolled structural shapes. Therefore, to meet camber
or sweep tolerances, they may need straightening by the producer. Other tolerances are subject
to negotiation with Nucor-Yamato Steel.
Nucor-Yamato steel produces steel to tolerances provided by ASTM A6 most recent revision.
Column tolerances applies to camber and sweep on following sections when specified at the time
of order entry as columns:
W8x8 (31 lbs/ft to 67 lbs/ft)
W10x10 (49 lbs/ft to 112 lbs/ft)
W12x12 (65 lbs/ft to 336 lbs/ft)
W14x14 ½ (90 lbs/ft to 132 lbs/ft)
W14x16 (145 lbs/ft to 730 lbs/ft)
Surface Finishes And Conditioning Surface imperfections on the finished
product are caused by a number of factors. However, they are generally of minor importance
and have no effect on the end use.
Fins or burrs are common with commercial sawing or shearing. And the presence of grease, oil,
mill scale or rust is unavoidable. It is a natural occurrence in the rolling and storing of all
structural shapes.
Our products may be conditioned in accordance with ASTM Specification A6/A6M, latest
edition.
May 2013 General Notes - 4 Nucor-Yamato Steel