a scaffold must be erected plumb, square, and level because

Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. A good time to perform these inspections is at the start of the workday to ensure the area is clear for that day's shift. How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . The scaffold is positioned so that swinging cannot bring the scaffold into contact with another surface. A narrow excavation made below the surface of the ground in which the depth is greater than the width with the width not to exceed 15 feet Resist penetration by objects and absorb the shock of a blow. These rules were combined under the umbrella of OSHA. D. Armed robots. The posts shall not be spaced more than 2.0 Mtrs. Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. improper grounding of circuitry and equipment. If uplift could cause the components to separate, locking pins must be used and the components secured. Any part of a building or structure used to support the scaffold shall be capable of supporting the maximum intended load to be applied. Hard hats must be worn by all persons erecting, moving, dismantling or using scaffolding. B. Diagonal bracing in both directions shall be installed across the entire outside face of all double- and single-pole scaffolds. All explosives must be accounted for at all times, and all not being used must be kept in a: OSHAs Hazard Communication Standard (HazCom) is designed to ensure that information about __________and associated protective measures is disseminated. B. 1926.454 2. a scaffold must be erected plumb, square and level because [, A space of at least 3 inches between handrails, or stair rails used as handrails, and other objects. 5% b. Plan the scaffolding setup a few weeks before the start of the project to make sure the scaffold fits the site. Scaffold brackets shall be constructed to fit the pitch of the roof and shall provide a level support for the platform. Crossbracing shall be installed between the inner and outer sets of poles on double pole scaffolds. Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. 15% c. 20% d. 25% Each bracket, except those for wooden bracket-form scaffolds, shall be attached to the supporting formwork or structure by means of one or more of the following: nails; a metal stud attachment device; welding; hooking over a secured structural supporting member, with the form wales either bolted to the form or secured by snap ties or tie bolts extending through the form and securely anchored; or, for carpenters' bracket scaffolds only, by a bolt extending through to the opposite side of the structure's wall. The supporting rope between the scaffold and the suspension device shall be kept vertical unless all of the following conditions are met: The rigging has been designed by a qualified person, and, The scaffold is accessible to rescuers, and, The supporting rope is protected to ensure that it will not chafe at any point where a change in direction occurs, and. a. Subscripts in the reactants must be conserved in the products. The scaffold must rest on a firm foundation, be plumb and braced to prevent swaying. The scaffold must be erected with cross, horiz ontal, or diagonal braces, or combination. Because there is always the chance that the wheel wasnt sound and could disintegrate or explode. Each turnbuckle shall be connected to the other end of its rope by use of an eyesplice thimble of a size appropriate to the turnbuckle to which it is attached. When horses are arranged in tiers, each tier shall be crossbraced. Apr. A supported scaffolding height-to-base ratio of . Use of fall protection above 10 feet. When erected scaffolds are to be moved by crane assure that: a. Scaffolds must be plumb, level, and squared. It is used in construction work where the work cannot be done from the ground level. All brace connections shall be secured. Forklifts, trucks, similar motor vehicles or add-on motors shall not be used to propel scaffolds unless the scaffold is designed for such propulsion systems. Scaffold platforms shall not be bridged one to another. Caster stems and wheel stems shall be pinned or otherwise secured in scaffold legs or adjustment screws. If the use of a power tool can result in flying sparks, metal shavings, wood chips, splashes, or other debris, workers should: A. All vertical joints of the scaffold are attached and secured by bolts and nuts or other fastening devices of adequate strength; b. C. To send every worker home whole and healthy every day Bearers shall be installed transversely between posts, and when coupled to the posts, shall have the inboard coupler bear directly on the runner coupler. It provides a safe and stable platform for workers. Ladders used to support ladder jacks shall be placed, fastened, or equipped with devices to prevent slipping. Scaffolding, also called scaffold or staging, is a temporary structure used to support a work crew and materials to aid in the construction, maintenance and repair of buildings, bridges and all other man-made structures.Scaffolds are widely used on site to get access to heights and areas that would be otherwise hard to get to. Cloudflare is currently unable to resolve your requested domain. Learning Objectives Manual force used to move the scaffold shall be applied as close to the base as practicable, but not more than 5 feet (1.5 m) above the supporting surface. Two other errors mentioned in this module that often lead to trouble are: Improper maintenance and failure to conduct regular inspections. As a general rule, a scaffold becomes inherently unstable once its height is four times its minimum base dimension, even if it is plumb and square. scaffold falls, 4,500 injuries and 50 deaths from scaffold-related accidents would be Clipping is a handy way to collect important slides you want to go back to later. One or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames, or similar rigid supports. Braces, bearers, and runners shall not be spliced between poles. and must be provided on any scaffold 10 feet or more above a lower level. Plumb and level the scaffold as it is being erected. Warped. Supported scaffolds with a height more than four times that minimum base width (4:1) must be what, According to manufacturer's recommendation's but at a minimum the scaffold must be tied closet to the 4:1 height and them repeated every 20 feet vertically to a scaffold 3 feet wide, How should the guys ties or braces be placed. 25. Move the scaffold into your desired position, and make sure it is level and secure. C. Any square or rectangular trench with a width that does not exceed 15 feet Boatswains' chair seat slings shall be a minimum of five-eight (5/8) inch (1.6 cm) diameter fiber, synthetic, or other rope which will satisfy the criteria (e.g., strength, slip resistance, durability, etc.) Be used only to support personnel, unless the scaffold has been designed for other loads by a qualified engineer and built to withstand the tipping forces caused by those other loads being placed on the bracket-supported section of the scaffold. By definition a scaffold is a temporary, elevated platform Crawling boards shall be secured to the roof by ridge hooks or by means that meet equivalent criteria (e.g., strength and durability). 7. 5. Platforms shall be of the ladder-type, plank-type, beam-type, or light-metal type. This instability causes the weight to shift from one leg to another and could cause the overload of the leg and the collapse of the scaffold. Scaffolds and scaffold components shall be designed by a registered professional engineer and shall be constructed and loaded in accordance with such design. Do not erect, dismantle or alter a scaffold unless under the supervision of a competent person. Scaffolds must be braced by cross, horizontal, or diagonal braces, or a combination thereof. B. Bamboo scaffolds The use of safe lifting postures and timing Scaffold erection shall progress in only one direction around any structure. Yet, because of the nature of where and how it is used, scaffolding can present many potential hazards. When two by fours are spliced to make a pole, mending plates shall be installed at all splices to develop the full strength of the member. 6, 1979, as amended at 55 FR 47687, Nov. 14, 1990; 61 FR 46025, Aug. 30, 1996; 85 FR 8736, February 18, 2020], Occupational Safety & Health Administration. The critical first step in developing a comprehensive safety and health program is to identify physical and health hazards at a work site. In general, head protection should do which of the following? The ladder jack shall be so designed and constructed that it will bear on the side rails and ladder rungs or on the ladder rungs alone. D. All of the above. Erectors should inspect all scaffold parts before use, and be checking for what, Cracks, dents, bends, breaks , corrosion and bad welds, Each platform more than 10 feet long should not extend more than how many inches over the support, to conduct a site inspection to identify site specific hazards not identified in the preplanning stage and note any other site specific characteristics, Plumb, square, and level starting with the first bay of the scaffold, What will happen if the scaffold is off leveled. Electric shock occurs when: A. Scaffolding by UWM 1. Non-mandatory Appendix A to this subpart contains examples of criteria that will enable an employer to comply with design and loading requirements for tube and coupler scaffolds under 125 feet in height. Your lines should be perfectly vertical (plumb) and horizontal (level), and your corners should be exactly 90 degrees (square). Damaged or deteriorated equipment must not be used USA (v. 2008) 21 Erecting Scaffolding Erect plumb, square and rigid with all brace connections securely fastened USA (v. 2008) 22 Tubular Welded-frame Scaffolds Be sure scaffold stays plumb and level as erection progresses For mobile scaffolds, use a horizontal diagonal brace, for Upon completion of the lesson, participants will be able to: The footing of scaffolding must be sound and rigid, capable of supporting the weight. Brackets used to support cantilevered loads shall: Be seated with side-brackets parallel to the frames and end-brackets at 90 degrees to the frames; Not be bent or twisted from these positions; and. That requirement reflects the additional hazards and structural stress involved with such heights. All hazards involved in the use of power tools can be prevented by following five basic safety rules: Keep all tools in good condition with regular maintenance; examine each tool for damage before use; operate according to the manufacturers instructions; provide and use the proper protective equipment; and: Live parts of electric equipment operating at 50 volts or more must be: While any employee is exposed to contact with parts of electric equipment or circuits that have been de-energized, the circuits energizing the parts shall be: The two best means of avoiding electrical shock or injury when working with power tools are: The majority of todays power line accidents occur because: Of failure to maintain proper work distances. A scaffold is a temporary structure that supports access or working platforms. A training program to teach proper lifting techniques should cover: Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk. Each bracket shall be attached to the securing wire rope (or ropes) by a positive locking device capable of preventing the unintentional detachment of the bracket from the rope, or by equivalent means. Using cranes to hoist material can have serious consequences if the process is not performed properly. Add several tablespoons of table salt to one cup and stir. "Footings shall be level, sound, rigid, and capable of supporting the loaded scaffold without settling or displacement." 1926.451 (c) (2) (i) Plumb, level, and make sure it is used, scaffolding can present many potential hazards more than Mtrs... Separate, locking pins must be braced by cross, horizontal, or diagonal braces, bearers, make! And timing scaffold erection shall progress in only one direction around any.! As it is level and secure nature of where and how it is being erected designed by registered! Boot trucks used to support the scaffold as it is being erected runners shall not be between! 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