( e) Bricklayers' square scaffolds (squares). Supports for platforms shall be attached directly to the support stirrup and not to any other platform. Two of the main differences between the hydraulic rough terrain crane and the crawler lattice boom friction crane are: True or False: Employers must provide a training program that teaches employees who might be exposed to fall hazards how to recognize such hazards and how to minimize them, and must also prepare a written certification that identifies the employee trained and the date of the training. Posts must be accurately spaced, erected on suitable bases, and maintained plumb. OSHA MODULE 5 Scaffolds a. As mentioned in this module, in addition to cave-ins and related hazards, workers involved in excavation work also are exposed to hazards involving: Falls, falling loads and mobile equipment. Scaffolds are a type of temporary work platform that is used to support workers, tools and materials. what to do and when to do it can save lives. B. It provides a safe and stable platform for workers. C. Electricity jumps its normal path and strikes a person Electricity travels in closed circuits, and its normal route is through a conductor. 2. We've encountered a problem, please try again. When horses are arranged in tiers, the legs of each horse shall be nailed down or otherwise secured to prevent displacement. Scaffolds are fabricated from many materialssome common, and others not so Employers must: Ensure that the safety monitor is a competent person knowledgeable about fall protection. Only employees need to demonstrate and practice safe manual lifting techniques. The use of safe lifting postures and timing Make sure the scaffold is stable. Passage may be made from one platform to another only when the platforms are at the same height, are abutting, and walk-through stirrups specifically designed for this purpose are used. Two other errors mentioned in this module that often lead to trouble are: Improper maintenance and failure to conduct regular inspections. The noise exposure measurement your employer makes must include all continuous, intermittent and ______ noise within a range of 80 dB to 130 dB. 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. The platform shall be supported by a minimum of two bearers, each of which shall project a minimum of 6 inches (15.2 cm) beyond the platform on both sides. Suspension scaffold rigging must at least 6 times the intended load. Non-mandatory Appendix A to this subpart contains examples of criteria that will enable an employer to comply with design and loading requirements for pole scaffolds under 60 feet in height. Scaffolds are commonly used in construction work so that workers have a safe, stable platform on which to work when work cannot be done at ground level or on a finished floor. 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. Guard or securely cover all holes created or uncovered before leaving a work area Secure access to the scaffold. Prevent An Expressway Emergency By Merging Without _____. Save my name, email, and website in this browser for the next time I comment. Place the planks. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Add several tablespoons of table salt to one cup and stir. Scaffolds not specifically addressed by 1926.452, such as but not limited to systems scaffolds, must meet the requirements of 1926.451. each of the hazards. All diagonal . When guardrails are used for fall protection, a workbench may be used as the toprail only if it meets all the requirements in paragraphs (g)(4)(ii), (vii), (viii), and (xiii) of 1926.451. Many precautions must be taken before scaffolding work can commence. The scaffold should be plumb, level and square. The bottom runners and bearers shall be located as close to the base as possible. Landings for the stair access are assembled within the 1.27m square bays at each end of the stair stringer bays using cuplock 1.27m . The scaffold assembly must be designed to comply with Local, State and Federal safety requirements. 9. The checks above are common scaffolding faults to look out for that show you the scaffold structure is unsafe. Scaffolds are plumb, square, level and situated on base . Now customize the name of a clipboard to store your clips. CapacityScaffolds and scaffold components must support at least 4 times the maximum intended load. A scaffold is a temporary structure erected to support access or working platforms. Then a few days before the scaff o l d materials are delivered, make a final jobsite check for the following items. has financial rewards, with an estimated annual savings of $90 million for American The purpose of this survey is: determine the condition of the structure so that measures can be taken, if necessary, to prevent the premature collapse of any portion of the structure. Some simple scaffolds are little more than planks and guardrails over two Electric shock occurs when: A. Platforms shall not exceed a height of 20 feet (6.1 m). Outrigger scaffolds are 3 inches or less from the front edge The inboard ends of outrigger beams shall be securely anchored either by means of braced struts bearing against sills in contact with the overhead beams or ceiling, or by means of tension members secured to the floor joists underfoot, or by both. Scaffolds must be erected, dismantled, or moved only by properly trained workers. If bearing on rungs only, the bearing area shall include a length of at least 10 inches (25.4 cm) on each rung. The scaffold is usually constructed from aluminium or steel tubes and clips, with timber or metal scaffold planks used to form a secure and level working platform. Ensure the surface on which the scaffold will be erected is firm, level and capable of Ensure that all scaffold parts are inspected before use to ensure they are in good repair and suitable for use. Prior to starting all demolition operations, OSHA 1926.850 (a) requires that an engineering survey of the structure be conducted by a competent person. Scaffold components. B. Scaffolds may only be designed, set up, used, or maintained in accordance with: Simple pretensioned beams and slabs of spans up to about 7 meters (23 feet): Can be demolished in a manner similar to ordinary reinforced concrete, True or False: Electrical detonators can be inadvertently triggered by stray RF (radio frequency) signals from two-way radios. It is used in construction work where the work cannot be done from the ground level. The following are the phases that need to be considered for safe installation and use of scaffolding: 1. A scaffold is a temporary structure specifically erected to support access or working platforms. Scaffolds shall be suspended from metal outriggers, brackets, wire rope slings, hooks, or means that meet equivalent criteria (e.g., strength, durability). a) square b) straight c) without braces d) vibration free e) level B Prior to hoisting an object it is best to a) know the route required b) know or calculate the mass c) measure its length d) attach at least two . If the use of a power tool can result in flying sparks, metal shavings, wood chips, splashes, or other debris, workers should: A. "Fabricated frame scaffolds" (tubular welded frame scaffolds). No more than one platform shall be placed between consecutive vertical pickups, and no more than two platforms shall be used on a catenary scaffold. Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. and that cross braces are of such length as will automatically keep the scaffold plumb, level, and square. Personal Fall Arrest System, Guardrail System, or 3/4 inch (1.9 cm) grabline or equivalent handhold securely fastened beside each crawling board. To prevent surface water from entering an excavation and to provide adequate drainage of the adjacent area, OSHA standards require the use of: Water removal equipment, diversion ditches, dikes, or other suitable methods. Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. When dismantling a scaffold, all work should be conducted: Tube and coupler scaffolds over 125 feet high must be designed by: What type of scaffold other than the tube and coupler scaffold is ideal for use around complex structures? Just a few example you can find fast on the interwebs, NFI . We thoroughly check each answer to a question to provide you with the most correct answers. Each bracket, at the contact point between the supporting structure and the bottom of the bracket, shall be provided with a shoe (heel block or foot) capable of preventing the lateral movement of the bracket. You've requested a page on a website (cloudflarepreview.com) that is on the Cloudflare network. 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. There are several important scaffolding design guidelines and safety rules that pertain to working on a scaffold: Guardrails and/or fall arrest systems are mandatory when working over 10 feet up. Use of fall protection above 10 feet. Electric shock occurs when: Workers need to take which of the following common-sense steps to protect themselves from falls through skylights and roof and floor openings? When platforms are being moved to the next level, the existing platform shall be left undisturbed until the new bearers have been set in place and braced, prior to receiving the new platforms. Personal Fall Arrest System. Guardrails should be between 38" and 45" high. Scaffolds must be braced by cross, horizontal, or diagonal braces, or a combination thereof. Scaffolding by UWM 1. A supported scaffolding height-to-base ratio of . Chicken Ladder. List at least three of the four main hazards to which persons working on a In noisy jobsites, these are often used to provide instructions to crane and derrick operators: Since its implementation in 1971, OSHA has: Helped cut work-related fatalities nearly in half and cut excavation and trenching fatalities by more than a third. Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. Scaffolding Injuries Approximately 2.3 million construction workers work on scaffolds regularly. Scaffold platforms must be fully decked or planked. When erected and used properly, it serves its function well. Supported scaffold poles, legs . Hard hats must be worn by all persons erecting, moving, dismantling or using scaffolding. All other connections of the scaffold are tight and secure; c. All components of the scaffold, including planks, are securely fastened. Fixed Scaffolding Erection Scaffold must be erected, moved, or disassembled only by and under the supervision of qualied persons. 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