Mobile Scaffold Braking
Mobile scaffold braking refers to the braking and locking systems on the wheels or casters of a rolling or mobile scaffold, designed to prevent any movement (rolling or swivelling) while workers are on the platform. It includes working braking and locking devices and a wheel-securing mechanism that must be applied prior to and while a worker is using the scaffold, as per Canadian OHS regulations.
On a shop floor, mobile scaffold braking is applied through equipment design and operating procedures. Scaffolds must have casters with functional brakes that stop wheel rotation and lock swivels. Before climbing, workers engage all brakes and install wheel chocks if needed. Movement with workers on the platform is prohibited. Brakes are released only after workers descend. Regular inspection ensures brakes are functional, with defective casters tagged out and replaced. Digital SOPs and checklists require confirmation of brake engagement before work at height.
- Using a rolling scaffold without functional brakes on all casters, such as missing, broken, or worn brakes, violating the requirement for working braking devices.
- Failing to apply braking or locking devices while workers are on the scaffold, often due to forgetting or assuming the scaffold won't move, contravening the duty to apply devices prior to and during use.
- Inadequate wheel securing or blocking for floor conditions and load, such as using light chocks on smooth concrete or relying solely on brakes on uneven or sloped floors, leading to creep or rolling under heavy loads.
How is 'suitable' braking capacity determined for mobile scaffolds?
Suitable braking capacity means devices capable of preventing movement under expected loads and floor conditions. This involves caster load ratings exceeding maximum anticipated load per wheel, sufficient static holding torque to resist gravitational and horizontal forces, and often additional blocking on low-friction surfaces. The core requirement is that the scaffold must not move under foreseeable forces once brakes are applied.
How do braking requirements relate to WorkSafeBC's treatment of 'moveable work platforms'?
WorkSafeBC Part 13 requires moveable work platforms on wheels to be secured to prevent movement before worker access. For mobile scaffolds, braking and locking devices are the primary means of securing. Unless design allows occupied movement, the default is immobilization while occupied, aligning with regulations requiring braking devices applied prior to and during use.
Are mobile scaffold brakes treated like mobile equipment brakes (e.g., ISO 3450)?
No. Mobile scaffolds are temporary work platforms, not powered mobile equipment. Their braking is governed by scaffold and platform provisions, not mobile equipment standards like ISO 3450. However, both require immobilization to prevent uncontrolled movement that could compromise stability, though scaffold brakes are manually operated and not subject to the same performance standards.