S15X42.9 Dimensions & Weight
S15X42.9 is an AISC American Standard (S) beam with an actual depth of 15 in and a 5.5 in flange, weighing 42.9 lb per foot — commonly used for floor beams and roof framing. It is the lightest of the 2 S15 sizes listed here.
S15X42.9 Dimensions
| Property | Imperial | Metric |
|---|---|---|
| Depth (d) | 15 in | 381 mm |
| Flange width (bf) | 5.5 in | 139.7 mm |
| Cross-section area (A) | 12.6 in² | 81.3 cm² |
| Weight | 42.9 lb/ft | 63.8 kg/m |
Standard: AISC. Values from the published section tables; dimensions not listed here are not shown rather than estimated.
What does S15X42.9 weigh and cost?
S15X42.9 weighs 42.9 lb per foot. At an example material price of $0.92/lb that is about $39.47 per foot. Set your quantity, length, and price to total your own run:
Material only, example pricing. Actual steel pricing varies by region, grade, quantity, and market conditions — use your own supplier numbers for real bids.
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Related sizes
Deeper reading: AISC Shape Database Guide · How to calculate steel weight