OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 6 Cranes, Hoists and Lifting Devices

Section 105 Structural testing and examination

Subsection 105(1)

When a tower crane arrives in Alberta for the first time and before it is used at a worksite, all structural and rigging elements and components must be inspected for soundness using accepted methods of non-destructive testing (NDT). Several methods are available including:

(a) eddy currents;
(b) ultrasound;
(c) acoustic emission;
(d) magnetism, including induction and Barkhausen;
(e) beta gauge;
(f) optical techniques such as shearography, holography, etc.;
(g) radiography e.g. X-ray imaging.

Since transporting equipment and time out of service may impact the integrity of crane components, this testing must be carried out even if similar testing was conducted before the crane arrived in Alberta.

Subsection 105(2)

A tower crane in continuous service at a project must undergo a structural examination every 2000 operating hours or 12 months, whichever happens first.

Subsection 105(3)

The tests required by subsections (1) and (2) must be under the direction and control of a professional engineer and the results certified by the engineer.