HSS3-1/2X3-1/2X3/8 Dimensions & Weight
HSS3-1/2X3-1/2X3/8 is a square hollow structural section, 3.5 x 3.5 in nominal outside with a 3/8 in nominal wall (0.349 in design wall per AISC), at 14.72 lb per foot — commonly specified for handrail posts, equipment frames, and miscellaneous metals.
HSS3-1/2X3-1/2X3/8 Dimensions
| Property | Imperial | Metric |
|---|---|---|
| Outside depth (nominal) | 3.5 in | 88.9 mm |
| Outside width (nominal) | 3.5 in | 88.9 mm |
| Wall thickness (nominal) | 3/8 in (0.375) | 9.5 mm |
| Design wall thickness0.93 x nominal, per AISC for A500 | 0.349 in | 8.9 mm |
| Cross-section area (A)computed from weight and steel density | 4.33 in² | 27.9 cm² |
| Weight | 14.72 lb/ft | 21.9 kg/m |
What does HSS3-1/2X3-1/2X3/8 cost?
At an example material price of $0.92/lb, HSS3-1/2X3-1/2X3/8 runs about $13.54 per foot, or roughly $271 for a 20-ft length.
Example pricing only. Actual steel pricing varies by region, grade, quantity, and market conditions — use your own supplier numbers for real bids.
Counting HSS3-1/2X3-1/2X3/8s off a drawing set by hand? SteelFlo finds every steel label on your PDF automatically — 3 takeoffs free.
Related sizes
Deeper reading: HSS Sizes: Square & Rectangular Tube Guide · How to calculate steel weight