What Static And Dynamic Ratings Mean<\/h2>\n
Two numbers describe the same cart. Static capacity is the load a frame carries while parked, and dynamic capacity is the load it carries while moving, cornering and braking. A 60 kg static cart holds about 40 kg in motion, and the difference sits in the castors, the brake pads and the frame joints rather than in the shelf surface.<\/p>\n
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- Static rating: measured with the cart parked on a level floor.<\/li>\n
- Dynamic rating: measured while rolling over a 10 mm threshold.<\/li>\n
- Brake hold: measured on a slope with the full rated load.<\/li>\n
- Drawer rating: measured per drawer, not for the whole cart.<\/li>\n<\/ul>\n
How A Load Test Is Run In The Factory<\/h2>\n
A trolley test sheet is short and repeatable. Weight plates are loaded evenly, the cart rolls a set distance, and the frame is measured before and after. The sequence below reflects powder-coated steel carts with 100 mm castors.<\/p>\n
\n
\n Test<\/th>\n Load applied<\/th>\n Duration<\/th>\n Pass criteria<\/th>\n Evidence kept<\/th>\n<\/tr>\n \n Static top load<\/td>\n 90 kg (1.5 times rated)<\/td>\n 24 hours<\/td>\n deflection under 2 mm<\/td>\n photo plus test sheet<\/td>\n<\/tr>\n \n Dynamic rolling<\/td>\n 60 kg rated load<\/td>\n 2 hours<\/td>\n castor wear under 1 mm<\/td>\n before and after photos<\/td>\n<\/tr>\n \n Brake hold on 5 degrees<\/td>\n 60 kg rated load<\/td>\n 10 minutes<\/td>\n movement under 5 mm<\/td>\n video clip plus sheet<\/td>\n<\/tr>\n \n Drawer cycling<\/td>\n 20 kg per drawer<\/td>\n 5,000 times<\/td>\n runner play under 3 mm<\/td>\n cycle counter readout<\/td>\n<\/tr>\n \n Packed carton drop<\/td>\n carton weight, 800 mm height<\/td>\n 1 drop per corner<\/td>\n frame alignment within 2 mm<\/td>\n carton condition photos<\/td>\n<\/tr>\n<\/table>\n ![\"Medical](\"https:\/\/sanyangmedical.com\/wp-content\/uploads\/2026\/07\/load-test-trolley.png\")
Weight plates plus a dial indicator answer the capacity question in one day.<\/figcaption><\/figure>\n Castors, Brakes And The 100 mm Rule<\/h2>\n
Castor diameter sets rolling effort. A 100 mm castor rolls a 60 kg load with noticeably less push force than a 75 mm castor, and hospital staff feel the difference within a week of use. Two castors should carry brakes on a four-castor cart, and the brake should be a total lock rather than a directional lock if the cart parks on a ramp.<\/p>\n
Wheel material matters as much as size. Polyurethane tyres protect vinyl flooring and resist flat spots, while hard nylon tyres roll easier but mark soft floors. A hospital that mixes both materials along one corridor will replace castors more often than frames, and castor replacement sits in the maintenance record rather than the purchasing file.<\/p>\n
Specifying Capacity For A Tender<\/h2>\n
Tender documents should state four values separately: static capacity in kg, dynamic capacity in kg, per-drawer capacity in kg and castor diameter in mm. A cart quoted against a single figure invites substitution, and a substituted castor can cut the dynamic rating by 30 percent without changing the frame at all.<\/p>\n
Two controls keep the specification alive. Ask for the test sheet with the batch number on it, and require the packed carton weight on the packing list so a lighter build becomes visible before delivery. On multi-cart orders, re-test the first 10 units of each production run against the approved sample and photograph the castor mounting plate, which is where most substitutions appear.<\/p>\n
A receiving check closes the loop. Weigh the first carton of every delivery against the packing list, roll one cart over a 10 mm threshold with the rated load, and compare the castor plate against the approved sample photo. The check takes 20 minutes per delivery and catches a substitution before the carts reach the wards.<\/p>\n
![\"Ward](\"https:\/\/sanyangmedical.com\/wp-content\/uploads\/2026\/07\/ward-quiet-trolley.png\")
Low noise castors change the ward noise profile long before the frame wears.<\/figcaption><\/figure>\n ▶ Watch: medical equipment manufacturing overview<\/span><\/div>\nFrequently Asked Questions<\/h2>\n
\nIs static or dynamic load the number to buy on?<\/h3>\n
Dynamic. A cart pushed between departments never performs at its static figure, and 40 kg against 60 kg static is normal for steel carts with 100 mm castors.<\/p>\n
How long should a brake hold test run?<\/h3>\n
Ten minutes on a 5 degree slope with the rated load and movement under 5 mm. Shorter tests miss the slow creep that reaches maintenance teams first.<\/p>\n
What castor diameter suits a loaded hospital cart?<\/h3>\n
100 mm for carts up to 60 kg dynamic, and 125 mm above that. Smaller castors raise push force sharply on floors with joints or a threshold.<\/p>\n
What evidence should ship with a trolley order?<\/h3>\n
The load test sheet with batch number, carton and packing list weights, and photos of the castor mounting plate. Those three make a substitution visible.<\/p>\n<\/div>\n
Buyers comparing frames before a tender can review the range on medical trolleys<\/a> and the drawer and accessory choices on trolley accessories and configurations<\/a>. Brake and lock hardware maintenance sits in the note on trolley lock cylinder maintenance<\/a>. Independent test methods for medical carts follow the inspection practice published by SGS<\/a>.<\/p>\n