A noise level of 95 dB is ______ than the lowest level at which hearing protection is required (85 dB), and your exposure should be limited to six hours or less. or more per square foot. scaffold falls, 4,500 injuries and 50 deaths from scaffold-related accidents would be Review the foundation. 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. Runners shall be interlocked on straight runs to form continuous lengths, and shall be coupled to each post. ERECTED SCAFFOLDS SHOULD BE CONTINUALLY INSPECTED by users to be sure that they are maintained in safe condition. 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. There are an estimated $90 million dollars lost because of . Scaffolds and scaffold components shall be designed by a registered professional engineer and shall be constructed and loaded in accordance with such design. When only a part of the width of the metal scaffold frame conforms to ladder spacing, then these frames must be erected in a manner that makes a continuous ladder bottom to top, with ladder sides of the frames in a vertical line. A scaffold should always be erected: Choose one answer. C. Have all brakes and locking devices set when the occupied personnel platform is in stationary position OSHA MODULE 5 Scaffolds All ladders used to support ladder jack scaffolds shall meet the requirements of subpart X of this part -- Stairways and Ladders, except that job-made ladders shall not be used to support ladder jack scaffolds. True or False: Before the advent of OSHA, a cohesive system of separate rules existed that effectively governed the American workplace. 3. 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. Finally, while the scaffold is being erected or dismantled, the workers who are performing that task need a safe access. The scaffold assembly must be designed to comply with Local, State and Federal safety requirements. Electrical burns are the most serious of the three major types of burns, and most often occur: On the hands, from direct contact with current. Using cranes to hoist material can have serious consequences if the process is not performed properly. Scaffold platforms shall not be bridged one to another. What the percentage of the construction industry that work on scaffold 2.3 million or 65 percent Most scaffolds at jobsites are made of what type of material Aluminum, Steel or less commonly wood Employees are plastering an lathing 18 inches or less from the front of the edge, What type of scaffolds you should not use, What is another don't that you should remember, Not to load scaffolds or scaffold components in excess of their maximum intended loads or rated capacities, which ever is less, OSHA 1926.454 (c) states: when an employer gas reason to believe that an employee lacks the skill or understanding needed for safe work involving the erection, use or dismantling of scaffolds, the employer shall, Retrain each such employee so that the requisite proficiency is regained, 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, This scaffold is simply a rope attached to a harness with an assembly like a boatswain's chair for the worker to sit in, If a worker on a scaffold can fall more than 10 feet, they must be protected by guardrails and or personal fall arrest systems(PFAS).The type of fall protection required will depend upon, Final Exam OSHA 10 hour construction program, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness, J.M. To prevent their displacement, platform units shall be nailed, bolted, or otherwise secured to outriggers. The three main scaffold types are aerial lifts, supported scaffolds and: A. Tubular scaffolds 15% c. 20% d. 25% scaffold are exposed, and describe at least one method of hazard prevention for The critical first step in developing a comprehensive safety and health program is to identify physical and health hazards at a work site. Plumb and level all scaffolds as the erection proceeds. Employees working in the vicinity of a crane must take care to avoid what kind of accident? Folding type metal brackets, when extended for use, shall be either bolted or secured with a locking-type pin. Many precautions must be taken before scaffolding work can commence. D. Static electricity gathers outside the circuit. A training program to teach proper lifting techniques should cover: A. All diagonal . Tube and coupler scaffolds over 125 feet in height shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with such design. No handhold available. 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. . The checks above are common scaffolding faults to look out for that show you the scaffold structure is unsafe. a. Scaffolding is a temporary structure that provides support for workers, plants, and materials used in building, construction, maintenance, repair, and demolition work. Ensure the scaffold has not been compromised by snow or ice conditions. Smith, Michael Abbott, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Fasten all couplers and/or connections securely before assembling the next level . which of the following statements is false? of first grade manila rope. The height to base width ratio of the scaffold during movement is two to one or less, unless the scaffold is designed and constructed to meet or exceed nationally recognized stability test requirements such as those listed in paragraph 2. Which of the following is an element of a hearing conservation program? D. Alertness and reaction time testing. Found a mistake? Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. Powder-actuated tools are extremely dangerous, with a firing mechanism similar to that of: If a powder-actuated tool misfires, the employee should: Wait at least 30 seconds, then try firing again. Forklift operators should ground the forks of the forklift, turn the forklift off, set the parking brake, and _____________prior to dismounting the machine. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the direct supervision of a scaffold competent person. Which of these is required if the workers body, hands or clothing may come into contact with moving parts? List at least three of the four main hazards to which persons working on a Each bearer shall be securely fastened to the platform. D. A hole of any shape with a depth that exceeds 15 feet. Any man-made cavity, depression, trench or cut in the earths surface formed by earth removal Wire ropes shall not be tightened to the extent that the application of a scaffold load will overstress them. 10. Enjoy access to millions of ebooks, audiobooks, magazines, and more from Scribd. Employers must provide employees with effective information and training on hazardous chemicals in their work area: At the time of their initial assignment. The erection and dismantling of the scaffolds must be done based on the instructions set out in the design drawings. Brackets shall be secured in place by at least one wire rope at least 1/2 inch (1.27 cm) in diameter. Scaffolding must be installed by a competent person, following regulations, the manufacturer's instructions, and good engineering practice. You've requested a page on a website (cloudflarepreview.com) that is on the Cloudflare network. Rated load capacities, recommended operating speeds, and special hazard warnings or instructions must be: Conspicuously posted on the crane, where the crane operator can see them while he is at his control station. B. 5% b. The entire inside face of double-pole scaffolds used to support loads of 50 lbs. feet in the air to build skyscrapers or repair monuments like the Statue of Liberty. The ladder must extend 1 m (3 ft.) above the landing. C. Any square or rectangular trench with a width that does not exceed 15 feet To ensure scaffolding safety, the scaffold must be built under the supervision of a competent person; someone who has been thoroughly trained on safe work practices when working on scaffoldings. Bracing shall be installed as close as possible to the intersection of the bearer and post or runner and post. Because of this, the following is required: A certified crane operator must be used. Before a scaffold is moved, each employee on the scaffold shall be made aware of the move. Scaffolds are plumb, square, level and situated on base . Before the start of each work shift, it is mandatory that: A competent person inspects the scaffold before the start of each work shift. Tap here to review the details. C. Always use a PFAS when working over an unguarded or uncovered opening more than six feet above a lower level Do not abuse or misuse the scaffold equipment. 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. Protect themselves by wearing the proper PPE Frequently used types of scaffolds include the Scaffolding is not to be erected, moved, dismantled or altered unless supervised by a . D. Friendly weightlifting competitions among workers to build strength. Each pump jack bracket shall have two positive gripping mechanisms to prevent any failure or slippage. Crawling Board. Make sure the scaffold is stable. Be supported by bearing blocks securely attached to the poles. An access ladder or equivalent safe access must be provided. Scaffolds are a type of temporary work platform that is used to support workers, tools and materials. Instant access to millions of ebooks, audiobooks, magazines, podcasts and more. Hard hats must be worn by all persons erecting, moving, dismantling or using scaffolding. 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. Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . Wooden bracket-form scaffolds shall be an integral part of the form panel. You might get some help from www.HelpWriting.net Success and best regards! Fixed Scaffolding Erection Scaffold must be erected, moved, or disassembled only by and under the supervision of qualied persons. Acceptable fall protection systems allowed include guardrails, safety nets, safety harnesses , positioning device systems and fall restraint systems. When erected and used properly, it serves its function well. proper measures to protect against or prevent accidents and injuries. Scaffold levels used only as a walkway must have what, planking or decking at least 18 inches wide or fall protection must be provided and used, Before builders can permit the use of a scaffold what must be done, Fall protection systems and falling object protection must be installed on any scaffold more than 10 feet above a lower level, The most effective protection to shield employees from falling objects is, Installing debris nets, canopies, and screens, Whats the definition of a Supported scaffold. Electricity travels in closed circuits, and its normal route is through a conductor. Brackets (including those provided with pointed metal projections) shall be anchored in place by nails unless it is impractical to use nails. ( e) Bricklayers' square scaffolds (squares). The form panel restraint systems following is an element of a hearing conservation program fastened to the.... 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a scaffold must be erected plumb, square, and level because