Heavy Duty Racking Load Capacity: Reading the Numbers Correctly
Direct answer: Heavy-duty racking capacity is not a single number. It is the lower of the beam capacity for a given span and load pattern, and the upright capacity for the load applied at that height — both taken from the manufacturer's load tables and then reduced for damage, floor conditions and seismic requirements.
Two different numbers: beam capacity and frame capacity
A racking system carries load through two separate elements, and quoting only one of them is the most common source of confusion in a warehouse enquiry. The beam (also called pair-of-beams capacity) is the load each level can carry. The frame, or upright, carries the accumulated load of all the levels in that bay.
Our selective pallet racking beams are specified from 1,000 kg to 4,500 kg per level, while heavy duty mold racks are built for 3,000 kg to 10,000 kg per level. These figures assume a uniformly distributed load (UDL) - that is, the pallet weight spread evenly across the beam span. A point load, or a pallet sitting partly off the beam, changes the picture completely.
The deflection limit you should ask about
Beams in pallet racking are generally designed to a vertical deflection limit of the loaded span divided by 200 (L/200) under nominal load. A beam will not fail immediately when deflection exceeds this ratio - it is a serviceability limit that keeps beams, decking and pallets working together over the service life rather than a collapse threshold. It is also the figure that auditing engineers check first.
Uprights are made from Q235B or Q355B steel sections supplied by Baosteel and Ansteel mills, with mill test certificates (MTC) and per-batch spectrometric re-verification. Cold-roll forming tolerances are held to ±0.3 mm across six tube-mill lines, with 8,000 metres of upright produced per day. Incoming steel grade is the reason two visually identical racks behave differently under load.
Which standards apply
Depending on your market, the governing design code differs. Our frames and beams are designed and verified to FEM 10.2, EN 15512, AS 4084 and JIS Z 0620, and the facility holds ISO 9001, ISO 14001, ISO 45001 and CE documentation, with SGS and TV Rheinland audits accepted.
Two things follow from this in practice. First, always confirm which code your local insurer or inspector requires before specifying - a design lawful in one market may need re-verification in another. Second, capacity is meaningless without the configuration: beam level spacing, number of levels, bay width and whether the top level is above the anchorage height all change the frame rating. A load application drawing is the only safe basis for a quotation.
FAQ
What load range do your pallet racking beams cover?
Our selective pallet racking beam levels are specified from 1,000 kg to 4,500 kg per level; heavy duty mold racks cover 3,000 kg to 10,000 kg per level. All values assume a uniformly distributed load, and final capacity depends on the beam span and configuration stated in the load application drawing.
Does EN 15512 mean a span/200 deflection limit?
Yes, EN 15512 uses a beam deflection limit of span/200 as the serviceability criterion for beams under working load. It is a usability and durability limit rather than an ultimate failure point. Auditing engineers commonly check this value first because excessive deflection usually appears long before any structural failure.
Which steel grade is used for uprights?
Uprights are cold-rolled from Q235B or Q355B sections sourced from Baosteel and Ansteel. Every batch carries the original mill test certificate and is re-verified by spectrometer before entering production. Using verified mill steel is one reason two visually identical racks can behave differently under load.
How long does delivery take and how fast is a quote?
Standard production runs 18 to 30 days per container; larger CTU projects take 30 to 45 days. We return quotations within 24 hours and provide free CAD layout and container loading plans. All quoted capacities are confirmed in writing before order placement.
All figures above refer to standard product data sheets; final confirmation is subject to written quotation.