W10x88 — Dimensions, Weight & Section Properties
American wide-flange (W) beam per ASTM A6 / AISC Steel Construction Manual
W10x88 is an American wide-flange beam 10.8 inches (274.3 mm) deep with a 10.3 in (261.6 mm) flange, weighing 88 pounds per foot (131 kg/m) — that is what the "88" in the designation means. All values below are the standard AISC published section properties used in US structural design, with metric equivalents alongside.
Typical uses: floor and roof framing, columns, headers, and general steel construction. For a quick stiffness check, see the deflection example below or open the beam calculator with your own span and load.
Dimensions
| Depth d | 10.8 in (274.3 mm) |
| Flange width bf | 10.3 in (261.6 mm) |
| Web thickness tw | 0.605 in (15.4 mm) |
| Flange thickness tf | 0.99 in (25.1 mm) |
Weight & Cross-Section
| Weight per foot | 88 lb/ft (131 kg/m) |
| 20 ft bar | 1,760 lb |
| 40 ft bar | 3,520 lb |
| Area A | 25.9 in² (167.1 cm²) |
Section Properties (strong / weak axis)
| Moment of inertia Ix | 534 in⁴ (22,227 cm⁴) |
| Section modulus Sx | 98.5 in³ (1,614 cm³) |
| Radius of gyration rx | 4.54 in |
| Moment of inertia Iy | 179 in⁴ (7,451 cm⁴) |
| Section modulus Sy | 34.8 in³ (570 cm³) |
| Radius of gyration ry | 2.63 in |
Compared with the neighbouring sizes
| Shape | d × bf (in) | lb/ft | Ix (in⁴) | Sx (in³) | Δ weight | Δ Ix |
|---|---|---|---|---|---|---|
| W10x77 | 10.6 × 10.2 | 77 | 455 | 85.9 | −12 % | −15 % |
| W10x88 (this page) | 10.8 × 10.3 | 88 | 534 | 98.5 | — | — |
| W10x100 | 11.1 × 10.3 | 100 | 623 | 112 | +14 % | +17 % |
Deflection example
A simply supported W10x88 spanning 17 ft with a 10 kip point load at midspan deflects 0.11 in (E = 29,000 ksi, Ix = 534 in⁴). The L/360 serviceability limit for this span is 0.57 in — the shape passes this quick check.
Calculate with your own span and load →
Frequently asked questions
How much does a W10x88 beam weigh?
W10x88 weighs 88 pounds per foot (131 kg/m). The number after the "x" in the designation is always the weight in lb/ft. A 20 ft bar weighs 1,760 lb and a 40 ft bar 3,520 lb.
What are the dimensions of a W10x88?
W10x88 is 10.8 in (274.3 mm) deep with a 10.3 in (261.6 mm) wide flange. The web is 0.61 in thick and the flanges are 0.99 in thick. Note the actual depth differs from the nominal W10 label — always design with the actual value.
What are the dimensions of a W10x88 in mm?
W10x88 is 274.3 mm deep with a 261.6 mm wide flange; the web is 15.4 mm and the flange 25.1 mm thick. In metric section properties: Ix = 22,227 cm⁴, Sx = 1,614 cm³.
How much does a W10x88 weigh in kg?
131 kg per meter. A 6 m bar weighs 786 kg and a 12 m bar 1,572 kg — handy when ordering US shapes from metric suppliers.
What is the moment of inertia of a W10x88?
About the strong axis, Ix = 534 in⁴ (22,227 cm⁴) with section modulus Sx = 98.5 in³. About the weak axis, Iy = 179 in⁴ and Sy = 34.8 in³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
W10x88 or W10x100 — what does one size up change?
W10x100 is about 14% heavier (100 vs 88 lb/ft) but about 17% stiffer (Ix 623 vs 534 in⁴). Going one step up within the same depth group is usually the cheapest way to cut deflection.
Values are entered from the governing standard’s published tables and cross-checked programmatically against its mass and section formulas before publication. Spotted an error? Write to advertising@metalabout.net — verified corrections ship within days. About