OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 19 Powered Mobile Equipment

Section 265 Windows and windshields

Subsections 265(1) and 265(2)

The glazing of powered mobile equipment must be approved to ANSI Standard Z26.1. Alternatively, non-shattering materials that provide at least equivalent protection can also be used.

ANSI Standard ANSI/SAE Z26.1 (1996), Safety Glazing Materials for Glazing Motor Vehicles and Motor Vehicle Equipment Operating on Land Highways – Safety Code, specifies performance criteria and the methods for testing safety glazing material used for windshields, windows, and partitions of land and marine vehicles and aircraft. Compared to ordinary sheet glass, plate glass, or float glass, safety glazing materials complying with the Standard reduce the likelihood of injury or the severity of injury should the materials break.

Six types of glazing are described in the Standard: laminated glass, tempered glass, wire glass, plastic, multiple glazed units, and bullet-resisting glazing. Glazing materials complying with the Standard are marked with the words “American National Standard” or the characters “AS”, a model number identifying the type of construction of the glazing material, and the manufacturer’s distinctive designation or trademark.

Subsection 265(3)

Cracked or broken glazing that obstructs or impairs an operator’s view creates a safety hazard and must be replaced as soon as practicable.

If cracks are present but do not obstruct the operator’s view, they may become a safety hazard over time and the employer should take this into consideration. Changing weather conditions, vibration, and flexing of the cab structure can cause a crack to spread or cause the entire glazing to shatter unexpectedly. These factors should be considered when deciding if cracked glazing that does not obstruct an operator’s view should be replaced.

Subsection 265(4)

Proper windshield wipers are mandatory on all powered mobile equipment equipped with a windshield. The wipers must be of sufficient size and the drive-motor strong enough to remove debris from the windshield under expected operating and weather conditions. For Alberta weather conditions, a properly operating cab/windshield heater can maintain wiper effectiveness and the operator’s view.