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SectionPro — steel profile section properties calculator

v1.1
How to use SectionPro

Four steps

  1. Profile. L, T, flat bar, or a bulb flat. For HP pick a catalogue size; off-catalogue dimensions are interpolated within the same b family, and outside the family SectionPro falls back to the BV NR467 Pt B Ch 4 Sec 6 [1.4.1] equivalent built-up section (about ±10 %). The Calculation Basis panel says which of the three was used. In a T, h is the web height, flange excluded.
  2. Attached plate. The plate goes on the profile foot — the web tip on a T or an L, the flat back face on an HP. You enter the width: effective breadth is not computed.
  3. Angle. A profile not square to the plate is handled by rotating the centroidal inertias (Mohr, with the product of inertia Ixy); the effective height becomes h·sin α. Approximate for a bulb.
  4. Corrosion. Pick the compartment on each face of the plate; t_c comes from BV NR467 Pt B Ch 4 Sec 3 Table 1. Gross and net properties are then shown side by side.

Reading the drawing

Profile and plate outline
Dimension lines
Neutral axis and centroid

Click a dimension on the drawing to edit it. The screen drawing and the one in the PDF are the same palette, so the sheet looks like what you checked.

Corrosion: what the rule adds on top

The table gives one value per face. These are conditions, not list entries, and SectionPro does not apply them for you: +1,0 mm on the plate surface within 3 m above the chain locker bottom (Tab 1 fn 2); +0,50 mm on dry bulk hold frames, ordinary stiffeners and primary supporting members within 3 m above the hold bottom (fn 9); a coated chemical tank may be taken at 0 (fn 3, IBC Code Ch. 6). Where a member sees more than one value, [1.2.5] puts the most onerous one on the whole strake.

What it does not do

Section properties only — no stress, buckling or strength check, and no effective breadth. The self-check button in the header runs the built-in cases against the live code and shows the count; click it for the list.

Validation Tests
— tests not yet run
Click "Run All Tests" to validate calculations against hand-computed reference values.
Input Parameters
Profile Type
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
Attached Plate
mm
mm
Corrosion Allowance
Profile Angle
deg
Section View
100%
Dims in mm · Click to edit
Results
Area
Total
—
Profile
—
Plate
—
Centroid
Ȳ (from top)
—
X̄ (from center)
—
Moments of Inertia
Ixx
—
Iyy
—
Section Moduli — Gross
Wxx Top
—
Wxx Bottom
—
Wyy
—
Radii of Gyration
ix
—
iy
—
Weight & Angle
Unit Weight (ρ=7850)
—
Profile Angle
—
Calculation Basis