The risks posed by numerous activities taking place in one site must be taken into account whenever multiple trades or contractors are working there. As an illustration, while painters are painting trim using oil-based paint (a flammable hazard), electricians may be checking the lights (an ignite source). The combustible fumes from this job could catch fire if sparks from the work are produced. The risks associated with each task can increase if you work close to other contractors.
The hierarchy of controls is set up so that the best hazard mitigation strategy is chosen before less protective ones. Elimination is the first factor to be taken into account when using this theory; if there is no danger, there is no hazard. VOC exposure can be avoided by switching to a water-based paint instead of an oil-based one.
The part of a personal fall system that fastens to the worker is called a body harness. To securely distribute the forces required to halt a fall, the harness is made up of a number of straps that wrap over the thighs, pelvis, chest, and shoulders.
A manual lift's proportionate physical strain and injury risk are measured by the lifting index (LI). The recommended weight limit (RWL) is multiplied by the load weight to determine the LI. For a typical, healthy employee, a LI score of less than 1.0 suggests little risk, while a result of higher than 1.0 denotes a danger of injury during the lift.
The weight that healthy workers could lift for up to eight hours without increasing their risk of musculoskeletal injuries is known as the recommended weight limit (RWL). It is determined as the result of multiplying the load constant by the horizontal, vertical, distance, asymmetry, frequency, and coupling multipliers.
A crane operator must be informed of the crane's capabilities and limitations in order to ensure a safe lift. Outriggers should always be used, and they should be placed on solid, level ground. How much of the crane's maximum rated load it can lift without tipping over will depend on the boom's angle. Finally, to lessen the chance of tipping, the tires must be fully filled.
After determining the soil type using 29 CFR 1926 Subpart P, Appendix A, the maximum slope angle can then be found by cross-referencing 29 CFR 1926 Subpart P, Appendix B. Clay is a "cohesive" Type-A material and requires a maximum slope angle of 53 degrees, with an associated height-to-depth ratio of 34 to 1. Therefore, a 3.75-foot angle, or 53 degrees, is the maximum needed for a five-foot trench. Any angle greater than this can cause the structure to collapse.
