there are openings in floors, roofs, and other working surfaces not otherwise covered or protected including skylights.a scaffold platform or other work platform, runway, or ramp.a floor, including the floor of a mezzanine or balcony.a worker could have access to the unprotected edge of any of the following work surfaces and is exposed to a fall of 2.4 metres (8 feet) or more:.a worker may fall into operating machinery, water or other liquid, or into hazardous substances or onto a hazardous object, or an opening on a work surface.there is a fall hazard of more than 1.2 metres, if the work area is used as a path for a wheelbarrow or similar equipment. ![]() a worker could fall more than 3 metres (10 feet) from any location. ![]() Guardrails or, if guardrails are impractical, other appropriate methods of fall protection or a protective covering must be used when: In many cases, guardrails are the most reliable and convenient means of fall protection and they must be your first consideration.Įmployers to adequately protect workers with the highest ranked fall protection method that is practicable, the most protective being a travel restraint system to the least protective being safety nets. Or, if guardrails are not practical, by a travel-restraint system Multiply that result by the number of platforms on the scaffolding unit to get the scaffold's live load.A worker at risk of falling certain distances (see below) must be protected by a guardrail system Divide the total weight by three, since each of the vertical posts of the scaffold bay are designed to bear a third of the total load. Then, assume that the material and equipment weight adds up to 1,000 kg. Multiply the average weight of a worker (erring on the heavier side) by ten. One of the simplest methods is to assume that there are up to ten workers on a scaffold at a given time. There are various methods for calculating live loads, and employers should ensure they use the method approved by local building and planning authorities. These weights are approximations and should, therefore, be estimated as conservatively as possible to ensure that the scaffold can safely bear all the weight that will be placed on it. The live load on a scaffold will include the weight of the workers and the materials and equipment those workers will be using at a given time. Calculating Live Loads for Scaffoldsīefore erecting scaffolding, its maximum live load should be calculated in order to ensure that it is built with the right type of tubing, bracing, and planks. To account for this, OSHA requires that scaffolds and their components must be able to support at least four times the maximum anticipated load. ![]() Given the nature of construction work, scaffolding is subject to an almost constantly shifting load of workers, materials, and tools. The Occupational Safety and Health Administration (OSHA) publish and enforce official standards for the construction and maintenance of scaffolding, including load requirements. Temporary structures must also factor this in. For example, a house might require a live load of 1.5 kPa, while a dance hall might need to accommodate a live load of 5.0 kPa to factor in the greater number of people using the space at once and the type of activities carried out in it.Ĭonstruction approval for a structure depends on design and structural plans that fully account for the relevant live load requirements. The American Society of Civil Engineers (ASCE) allocates minimum live load requirements according to the intended use of a building or a temporary structure. Live loads are factored into calculations of a structure's load capacity.
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