RE: AISC's Metric equiv. of WT13.5X51

• To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
• Subject: RE: AISC's Metric equiv. of WT13.5X51
• From: Charlie Carter <carter(--nospam--at)aiscmail.com>
• Date: Tue, 21 Mar 2000 11:37:11 -0600
Title: RE: AISC's Metric equiv. of WT13.5X51

The Metric Conversion of the AISC LRFD Manual of Steel Construction, 2nd Edition lists all shapes as far as how they correspond between the U.S. Customary and Metric series correspond. So does ASTM A6/A6M.

If you don't have either of those documents handy, here's a quick trick to get a close estimate (often the exact listing) of the metric equivalent of any U.S. W-shape in ASTM A6/A6M. Take the nominal depth, multiply it by 25 and round the resulting number to an increment of 10. Then take the lbs. per ft, multiply it by 1.5 and round the resulting number to the nearest increment of 1. For example, with a W21x44:

21 x 25 = 530
44 x 1.5 = 66

So a W21x44 in the U.S. customary series is a W530x66 in the metric series (see ASTM A6/A6M). You can apply the same process to any other shape, too. Just keep use the right factor for the units of measure. Also, rounding may be different, but you get the idea.

Charlie