HSS18X18X3/4 Dimensions & Weight
HSS18X18X3/4 is a square hollow structural section, 18 x 18 in nominal outside with a 3/4 in nominal wall (0.698 in design wall per AISC), at 171.16 lb per foot — commonly specified for heavier columns and brace members.
HSS18X18X3/4 Dimensions
| Property | Imperial | Metric |
|---|---|---|
| Outside depth (nominal) | 18 in | 457.2 mm |
| Outside width (nominal) | 18 in | 457.2 mm |
| Wall thickness (nominal) | 3/4 in (0.75) | 19 mm |
| Design wall thickness0.93 x nominal, per AISC for A500 | 0.7 in | 17.7 mm |
| Cross-section area (A)computed from weight and steel density | 50.3 in² | 324.5 cm² |
| Weight | 171.16 lb/ft | 254.7 kg/m |
Standard: AISC. Values from the published section tables; dimensions not listed here are not shown rather than estimated.
What does HSS18X18X3/4 weigh and cost?
HSS18X18X3/4 weighs 171.16 lb per foot. At an example material price of $0.92/lb that is about $157.47 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: HSS Sizes: Square & Rectangular Tube Guide · How to calculate steel weight