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Structural · W — wide-flange

W18x35 Steel Beam — Dimensions & Properties

W18x35 weighs 35 lb/ft and is about 17.7 in deep. Below: the full AISC section properties, a scaled cross-section, and a pre-filled weight calculator.

Weight
35lb/ft
Depth
17.7in
Width
6in
Area
10.3in²
Shape
W18X35 · W — wide-flange

Enter feet + inches, e.g. 20' or 18' 6".

= 20' (240″)
pcs
Cost estimate (optional)
$/lb

Optional. Prices are volatile — use your current mill/supplier rate.

Total weight
1 × W18X35
700lb
Per piece
700lb
Pieces
1
Total
700lb
Tons
0.35t
d17.7"bf 6"tw 0.3
ƒShow the math
  1. 1.Weight per foot (from AISC)per AISC Shapes Database v16.0

    W18X35 is a listed shape; its nominal weight is a published property.

    = 35 lb/ft
  2. 2.Length in feet
    length (in) ÷ 12
    240 ÷ 12
    = 20 ft
  3. 3.Weight per piece
    weight per foot × length
    35 × 20
    = 700 lb
  4. 4.Total weight
    weight per piece × quantity
    700 × 1
    = 700 lb
  5. 5.Convert to tons
    total lb ÷ 2000
    700 ÷ 2000
    = 0.35 tons

Section properties

Geometry
Weight
35lb/ft
Area, A
10.3in²
Depth, d
17.7in
Flange width, bf
6in
Flange thick, tf
0.425in
Web thick, tw
0.3in
Strong axis (x-x)
Ix
510in⁴
Sx
57.6in³
Zx
66.5in³
rx
7.04in
Weak axis (y-y)
Iy
15.3in⁴
Sy
5.12in³
Zy
8.06in³
ry
1.22in
Torsion & warping
J
0.506in⁴
Cw
1,140in⁶
Before you rely on this
  • Listed weight is the AISC theoretical (nominal) weight per foot. Actual mill weight varies within ASTM rolling tolerance, roughly ±2.5%.
  • This is bare member steel only. Add plates, stiffeners, connections, bolts, and coatings for a full erected-steel takeoff.

Similar shapes

Same series and nearest depths — compare weight and section modulus when you are sizing.

W18x40 40 lb/ftW18x46 46 lb/ftW18x50 50 lb/ftW18x55 55 lb/ftW18x65 65 lb/ftW18x76 76 lb/ftW18x86 86 lb/ftW18x97 97 lb/ftW16x100 100 lb/ftW16x89 89 lb/ft

W18x35 — questions

How much does a W18x35 weigh per foot?
A W18x35 weighs 35 lb/ft. Over a 20-foot length that is 700 lb (0.35 tons); a 30-foot length is 1,050 lb.
What are the dimensions of a W18x35?
W18x35 has an actual depth of 17.7 in and a flange width of 6 in, a flange thickness of 0.425 in, and a web thickness of 0.3 in. Cross-sectional area is 10.3 in².
What is the moment of inertia and section modulus of a W18x35?
About its strong axis, W18x35 has a moment of inertia Ix of 510 in⁴ and a section modulus Sx of 57.6 in³, with a plastic section modulus Zx of 66.5 in³. Use these with your engineer's design values — they are geometric properties, not an allowable load.
What does W18x35 mean?
The W means wide-flange. The first number is the nominal depth in inches and the second is the weight in pounds per foot — so W18x35 is a nominally 18-inch-deep wide-flange beam weighing 35 lb/ft (actual depth 17.7 in).

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Sources & references

Estimates for planning purposes only. Verify all results against the code edition adopted in your jurisdiction and with your Authority Having Jurisdiction (AHJ). This tool is not a substitute for a licensed professional engineer. See our methodology, sources, and code editions.

Data: AISC Shapes Database v16.0, © AISC — used per its developer-use provision.