Engineering reference
Load Ratings (ISO 1496-1)
The stacking, racking and wall-strength test loads ISO 1496-1 requires a Series 1 container to withstand — the figures container hardware is specified against.
Stacking Loads
| Maximum gross mass (20 ft) | 30 480 kg (30.48 t) |
|---|---|
| Maximum gross mass (40 ft) | 32 500 kg (32.5 t) |
| Maximum gross mass (40 ft HC) | 32 500 kg (32.5 t) |
| Maximum gross mass (45 ft) | 32 500 kg (32.5 t) |
| On-chassis stacking test load | 1.8× Rg per corner |
| Standard stack test (ship) | 9× Rg total |
| TLA vertical spacer min design load | 250 kN per corner casting |
Racking, Lifting & End-Wall Forces
| Longitudinal racking test | 75 kN |
|---|---|
| Transverse racking test | 150 kN |
| Four corner lifting | 1.25× Rg per corner |
| Under-wing test | 1.25× Rg |
| End wall test force | 0.4× Pg (P = payload) |
| Floor strength — concentrated load | 7 260 kg over 284 cm² |