Testing
Product Testing Methods
Safe Working Load
Marco steel wire cable trays are tested across two spans and a cantilever. The deflection is measured on the central span using three sensors placed on the sides and at the centre to the tray. The test method conforms to the BSEN 61537 standard. Note: The maximum deflection of 1/100 is always reached for a lesser load than that of the safety load. (The breaking point divided by a safety co-efficient of 1.7). CEI/61537
Coupling S/%
0.4S
S
S
Recommended Support Spacing
There is an optimum configuration to obtain 2 metre spans without the couplings being positioned at the supports or in the middle of the spans. To obtain this result, the first span is deliberately limited to 1.5 metres, then the supports are placed approximately every 2 metres. The coupling points are therefore always 0.5 metres from a support.
3M
3M
3M
COUPLER
COUPLER
COUPLER
S/5
S/5
S/5
1.5M
2M
2M
2M
2M
Allied Tube & Conduit
atkore.com/marco
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