Atkore Unistrut & Marco Digital Catalogue

Testing

Product Testing Methods

Safe Working Load

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

319

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