Verification › V.05 Steel design: IS 800:2007

V.05.2Short ISMB 300: Shear Governs

Within 0.02% of STAAD.Pro

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Problem

Compare the IS 800:2007 limit-state capacities with STAAD.Pro's design output.

STAAD.Pro V8i SS6, the same input file run by Sutranet (CODE IS800 LSD, TRACK 2 for the capacity of each clause).

ISMB 300, simply supported, span 1 m
500 kN/m: 250 kN shear at the supports
E 205 GPa; the checks are given STAAD's section properties, so the comparison is of the code clauses alone

Front view (X right, Y up). Joints numbered, supports marked ▲. Drawn from the project file.

Capacities

Result	Clause	STAAD.Pro	Sutranet	Difference
Web shear Vd (kN)	8.4	303.109	303.1089	none
Plastic moment, low shear (kN·m)	8.2.1	154.773	154.7727	none
Governing ratio		0.825	0.8248	none

With shear above 0.6 Vd, Cl 9.2.2 reduces the moment capacity; Sutranet applies the reduction (to between the flange-only and plastic capacities), while STAAD reports the plastic value.
In the app, sections come from the IS 808:2021 table, which differs from STAAD's older table by up to 1.1% (see V.07.1), so the app's capacities differ from these by about that much.

Open the project in the app (no sign-up needed), or download the file and open it with 📂 Import Job JSON in the File group.
Run Analysis (Static) with P-Delta Analysis unticked and Design Code IS 800.

The app works in SI units; results in kip and inch are converted (1 kip = 4.448 kN, 1 kip-in = 0.1130 kN·m, 1 in = 25.4 mm).

Automated test: staad_design.rs, run on every change.

Run your own models the same way

Free account: build frames, trusses and towers, import STAAD .std files, and run IS 800 and AISC design checks in your browser.