LT END CARRIAGE CALCULATOR WITH SELECTION

End Carriage Section Modulus Calculator

Determine the required Section Modulus ($Z_x$) and get an automatic ISMC section recommendation.

1. Crane Parameters

Crane Capacity (Rated Load)

kg

Total Girder Weight

kg

Hoist + Trolley Weight

kg

Crane Span (for ratio check)

mm

End Carriage Wheelbase

mm

Beams per Carriage (e.g., 2 for ISMC)

qty

Class of Duty (IS 807 / IS 3177) Class I / II (Light / Medium) Class III (Heavy) Class IV (Extra Heavy / Severe)

2. Calculation Results

Recommended Section per Beam

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Calculation Breakdown:

Required Section Modulus ($Z_x$): 0.00 cm³

Max Load on one Carriage (P): 0 kg

Moment per Beam (M_beam): 0 N-mm

Allowable Bending Stress (f_b): 150.0 MPa

3. Reference Table (IS 808)

Section	Section Modulus ($Z_x$)	Weight (kg/m)
ISMC 125	70.3 cm³	12.7 kg/m
ISMC 150	105.1 cm³	16.8 kg/m
ISMC 200	194.7 cm³	22.1 kg/m
ISMC 250	304.5 cm³	30.7 kg/m
ISMC 300	450.4 cm³	35.8 kg/m
ISMC 350	625.6 cm³	42.1 kg/m
ISMC 400	835.3 cm³	49.4 kg/m

Important Design Note: ISMC vs. Fabricated Box

While ISMC sections are suitable for light-duty cranes (e.g., 1-3 tons), they are very weak against twisting (torsional) forces. For heavier cranes (5 tons and above) or long wheelbases, it is **strongly recommended** to use a **fabricated box section**. A box is thousands of times more rigid against twisting, making it far safer and more durable. You can still use this calculator to find the minimum $Z_x$ your fabricated box must be designed to have.