Free Load Test Certificate Template — Proof Load Testing

The UK and the US take opposite approaches. LOLER never schedules load tests: under regulation 2(1), thorough examination includes testing only 'where it is appropriate', and HSE's L113 guidance (para 310) leaves the decision — whether a test is needed at all, and what form it takes — to the competent person. For new equipment, the thorough examination is considered to have been carried out by the manufacturer or supplier and confirmed in the EC Declaration of Conformity, provided the declaration was made not more than 12 months before the equipment goes into service (LOLER reg 9(1)); where safety depends on installation conditions, the equipment must still be thoroughly examined after installation and before first use (reg 9(2)). The US, by contrast, writes specific test triggers into federal law.

• UK — after manufacture (manufacturer's test, confirmed via the Declaration of Conformity), after installation where safety depends on it, or when the competent person's examination scheme requires it
• UK — LEEA treats significant modification or repair as the exceptional circumstance that justifies an overload test
• US — operational tests prior to initial use of all new and altered overhead/gantry cranes (OSHA 1910.179(k)(1))
• US — new, repaired or reconditioned alloy steel chain slings proof tested per ASTM A391 before use, by the manufacturer or equivalent entity (OSHA 1910.184(e)(4))
• US construction — special custom-design grabs, hooks and clamps proof-tested to 125% of rated load prior to use (OSHA 1926.251(a)(4))

There is no universal proof-load percentage. OSHA 1910.179(k)(2) caps crane rated load tests: 'Test loads shall not be more than 125 percent of the rated load unless otherwise recommended by the manufacturer' — a ceiling, not a target. ASME B30.20 says new, altered or repaired lifting devices 'should' be tested — a recommendation, not a mandate — and where a test is performed, it runs under the direction of the manufacturer or a qualified person, with a written report confirming the load rating and the same not-more-than-125% cap. OSHA has confirmed in interpretation that for custom-design accessories in construction, 1926.251(a)(4)'s 'shall' governs over B30.20's 'should'. Meanwhile sling families and other standards use entirely different multiples — which is why this certificate's first test-detail field is the standard applied.

• Overhead & gantry cranes (US): rated load test capped at 125% of rated load — OSHA 1910.179(k)(2)
• ASME B30.20 lifting devices: 'should be tested' prior to initial use; if tested, not more than 125% unless the manufacturer recommends otherwise
• Slings (US): 2× rated capacity for wire rope slings with welded end attachments; at least 1.5× for metal mesh — OSHA 1910.184
• Chain at manufacture (EN 818): proof force of 2.5× WLL for grade 8 chain and each leg of an assembled chain sling — a manufacture-time test, distinct from any in-service test
• AS 4991 lifting devices: certification by proof load test or engineering analysis; industry-published tiers run 2× WLL up to 10 t, (1.04 × WLL) + 9.6 t from 10–160 t, and 1.1× WLL above 160 t — verify against your edition of the standard before testing

Unless national legislation, a standard or the manufacturer makes it mandatory, LEEA does not recommend routine overload testing of lifting equipment — the exception being an exceptional circumstance such as significant modification or repair. HSE's L113 points the same direction: the design of certain lifting equipment is such that damage may be caused by conventional overload tests, and the competent person should take account of the manufacturer's instructions, including on how often such testing happens. A load test is an event with a specific justification — the 'reason for test' field on this certificate — not a calendar habit.

• Most structural failures result from fatigue — defects an overload test will not reveal (LEEA)
• Repeated overloads can cause deterioration of the structure over time, and there is no defined structural or mechanical benefit (LEEA)
• Many insurance policies exclude cover for equipment that has been overloaded (LEEA)
• A thorough examination is required before and after any overload test
• Where a test exceeds SWL: clear the area, essential workers only, complete the test efficiently (HSE L113); for cranes, the BS 7121 series covers overload testing

Three methods dominate: calibrated solid test weights; water-filled proof-load bags, where empty bags are rigged to the lifting point and water is pumped in gradually to raise the load in controlled increments, monitored through calibrated load cells and held for a set duration — avoiding shock loading and allowing a safe abort; and dynamometer / load-cell or hydraulic rigs for tensile tests. OSHA has confirmed that 1926.251(a)(4) does not mandate a particular means of determining the test weight — so the certificate has to say what you actually used. And the recorded load is only as credible as the calibration behind it, which is why the measuring-equipment IDs and calibration certificate references sit next to the method field, not in a filing cabinet somewhere.

• Calibrated solid test weights — the traditional method
• Water bags — gradual, monitored loading via calibrated load cells; no shock loads, safe abort if something moves
• Dynamometer / load-cell and hydraulic rigs for tensile proof tests
• Certificate fields: method used, measuring-equipment identification, calibration certificate references