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Z Section Weight Calculator — Z Purlin kg/m, lb/ft & Total Weight

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Section dimension unit Web depth Top flange width Bottom flange width Top lip length Bottom lip length Sheet thickness Piece length unit Piece length Number of pieces Whole pieces only.Material density (kg/m³) Use documented density for the actual material.Procurement allowance (%) Applied to order mass, not theoretical kg/m.Rate per kg (optional) 0 disables cost.Target mass unit Target mass (optional) Reverse-solves whole entered-length pieces.Manufacturer / supplier kg per metre (optional) Reports variance without replacing ideal geometry.

Calculated result

357.96 kg · 789.17 lb

5.966 kg/m · 4.009 lb/ft

380 mm developed centerline length · 760 mm² thin-wall area

35.796 kg per piece

357.96 kg net batch mass

Enter rate/kg for procurement cost

Enter target mass for reverse whole-piece count

Enter manufacturer/supplier kg/m to compare against geometry

Show the working

1. Developed length ≈ 200 + 70 + 70 + 20 + 20 = 380 mm.
2. Thin-wall area ≈ 380 × 2 = 760 mm².
3. Unit mass = 760 × 10⁻⁶ × 7,850 = 5.966 kg/m.
4. Piece mass = 5.966 × 6 = 35.796 kg; net batch = 35.796 × 10 = 357.96 kg.

Thin-wall Z-section mass estimate only. Bend radii, corner deductions, coatings, holes and manufacturing tolerances are not modeled. For a named proprietary purlin, use the current manufacturer section table or certificate; do not use this mass calculator for structural capacity.

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