文档介绍：Applicable to Shapes:
Shape Dimensions
Nomenclature & Permissible Variations HP, M & W
Units
Common
Permissible Variations
Name
Metric
English
Symbol
A Cross-sectional Area in2 mm2 Õ Calculated from SDI shape – information only
bf Flange Width in mm As per latest edition of ASTM A6/A6M
d Flange Depth in mm As per latest edition of ASTM A6/A6M
k ‘k’– line in mm Detailing dimension – information only
k1 “k1”– line in mm Detailing dimension – information only
L Length ft, in m ÕLength cutting tolerance as per current SDI price page
R Fillet Radius in mm Mill practice – information only
T ‘Clear” Web in mm Detailing dimension – information only
tf Flange Thickness in mm As per latest edition of ASTM A6/A6M
tw Web Thickness in mm As per latest edition of ASTM A6/A6M
w Weight / Mass lbs/ft kg/m As per latest edition of ASTM A6/A6M
ÕDenotes deviation from ASTM A6/A6M
The permissible dimensional variations of structural long products manufactured by Steel Dynamics Inc,
Structural and Rail Division, conform to the latest edition of ASTM A6/A6M. Cross-sectional areas in the
following tables are calculated from nominal dimensions, and include the nominal fillet radius employed by Steel
Dynamics Inc. Consequently, the tabulated values may slightly deviate from those published in ASTM A6/A6M.
Nominal detailing dimensions are provided as a courtesy. Permissible dimensional variations, and rolling
factors (such as roll wear), may result in supplied shapes differing from the tabulated values. Consequently,
allowances should be made for proper fitting and connections.
Piece length tolerance deviates from ASTM A6/A6M. Please consult the current price page for mill practice.
*Please note that Steel Dynamics, Inc. reserves the right to produce material in either the Heavy Section Mill
(HSM) or the Medium Section Mill (MSM).
Information Subject to change without prior not