S8X18.4 Dimensions & Weight
S8X18.4 is an AISC American Standard (S) beam with an actual depth of 8 in and a 4 in flange, weighing 18.4 lb per foot — commonly used for lintels, trimmers, and light framing. It is the lightest of the 2 S8 sizes listed here.
S8X18.4 Dimensions
| Property | Imperial | Metric |
|---|---|---|
| Depth (d) | 8 in | 203.2 mm |
| Flange width (bf) | 4 in | 101.6 mm |
| Cross-section area (A) | 5.41 in² | 34.9 cm² |
| Weight | 18.4 lb/ft | 27.4 kg/m |
Standard: AISC. Values from the published section tables; dimensions not listed here are not shown rather than estimated.
What does S8X18.4 weigh and cost?
S8X18.4 weighs 18.4 lb per foot. At an example material price of $0.92/lb that is about $16.93 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