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Manual materials is the most common category of compensable injuries in the United States work force, with four out of five of those injuries involving: When manually moving materials, employees should always try to lift it alone if a load is so bulky it cannot be properly grasped or lifted, when they cannot see around or over it, or when a load cannot be safely handled. Specific requirements are described below. (Do not use insulating Styrofoam cups.) All joints must be List at least three of the four main hazards to which persons working on a Which industries are employees potentially exposed to silica dust: Anytime an adapter is used to accommodate a two-hole receptacle, the adapter wire must: 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). Braces, bearers, and runners shall not be spliced between poles. The ladder must extend 1 m (3 ft.) above the landing. ERECTED SCAFFOLDS SHOULD BE CONTINUALLY INSPECTED by users to be sure that they are maintained in safe condition. Scaffolds shall be stabilized to prevent tipping during movement. 3. The ground is level and stable. Found a mistake? Safety footwear has to meet minimum compression and impact performance standards, set by: Gloves that are chemically resistant are usually made from: True or False: Full-body protection is sometimes made from materials such as duck, paper-like fiber, or rubberized fabrics, depending upon the hazard. 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. employers in workdays not lost. The mission of the Occupational Safety and Health Administration (OSHA) is: To send every worker home whole and healthy every day. Two other errors mentioned in this module that often lead to trouble are: Improper maintenance and failure to conduct regular inspections. 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. You might get some help from www.HelpWriting.net Success and best regards! Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the supervision of a scaffold competent person. Your IP: 143.244.138.144, Requested URL: www.concreteconstruction.net/_view-object?id=00000154-24cb-db06-a1fe-77cb16a60000, User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36. . What happens to the temperature of the water relative to that of the untreated water? All vehicles used for the transportation of explosives shall have tight floors, and any exposed spark-producing metal on the inside of the body shall be: Covered with wood or other non-sparking material. Where wooden poles are spliced, the ends shall be squared and the upper section shall rest squarely on the lower section. Keep Vehicles and Heavy Equipment Clear. General. Scaffolding by UWM 1. Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. Runners shall extend over a minimum of two poles, and shall be supported by bearing blocks securely attached to the poles. D. Stop using the tool, A. Now customize the name of a clipboard to store your clips. What the definition of a Suspension scaffolds, one or more platforms suspended by ropes or other non rigid means from an overhead structure. Stilts shall be properly maintained. Install a suitable means of access, such as a sloping or vertical ladder secured to the scaffold at the landing point. Be placed on a firm foundation and be uniformly level within 1 percent of level grade 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 planks should extend over their end supports not less than 6 inches nor more than 18 inches. 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. The inboard end of outrigger beams, measured from the fulcrum point to the extreme point of anchorage, shall be not less than one and one-half times the outboard end in length. Cross braces must keep the scaffold plumb, level, and square; All brace connections must be secured to prevent dislodging; Frames and panels must be joined together vertically by coupling or stacking pins or equivalent means; Frames and panels must be locked together to prevent uplift (separation of a 1. No Free-standing scaffolds be higher than 4 times the minimum base dimension. "Plasterers', decorators', and large area scaffolds." Choose one answer. 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. 5% b. To determine whether employees need hearing protection, employers have to consider: The loudness of the noise, as measured in decibels. Platforms shall not exceed a height of 20 feet (6.1 m). 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. Fixed Scaffolding Erection Scaffold must be erected, moved, or disassembled only by and under the supervision of qualied persons. Diagonal braces shall be installed between squares on the rear and front sides of the scaffold, and shall extend from the bottom of each square to the top of the next square. "Two-point adjustable suspension scaffolds (swing stages)." Before an abrasive wheel is mounted, it should be inspected closely and: Sound- or ring-tested to ensure that it is free from cracks or defects. Scaffold components. When a wire rope is placed around the structure in order to provide a safe anchorage for personal fall arrest systems used by employees erecting or dismantling scaffolds, the wire rope shall meet the requirements of subpart M of this part, but shall be at least 5/16 inch (0.8 cm) in diameter. Ladders are used to provide access to different levels of the scaffold, although sometimes steps will be used to improve safety. 3. When horses are arranged in tiers, each tier shall be crossbraced. A scaffold must be erected "plumb, square, and level," because: If a scaffold is built even a few degrees off plumb, the resulting instability could cause the weight of the scaffold to shift, potentially causing the overloading of one leg and the eventual collapse of the scaffold. The site owner may have set restrictions that prevent you from accessing the site. Why? 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. The scaffold is positioned so that swinging cannot bring the scaffold into contact with another surface. Platform units shall be securely attached to the needle beams by bolts or equivalent means. b. Coefficients are used to balance the atoms on both sides. Scaffold support beams shall be installed on edge. Crawling boards shall extend from the roof peak to the eaves when used in connection with roof construction, repair, or maintenance. Crossbracing shall be installed between the inner and outer sets of poles on double pole scaffolds. By whitelisting SlideShare on your ad-blocker, you are supporting our community of content creators. Enjoy access to millions of ebooks, audiobooks, magazines, and more from Scribd. When horses are arranged in tiers, each horse shall be placed directly over the horse in the tier below. The frames must be plumb and level and spaced to adequately support the loads. A. Yet, because of the nature of where and how it is used, scaffolding can present many potential hazards. Electricity travels in closed circuits, and its normal route is through a conductor. B. 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). Independent support lines and suspension ropes shall not be attached to the same points of anchorage. Name the three types of scaffolds and describe their main characteristics Cloudflare is currently unable to resolve your requested domain. It provides a safe and stable platform for workers. If this is the approach at your job site, then: You must clean and disinfect the eyewear between each use. A scaffold is a temporary structure specifically erected to support access or working platforms. The following are the phases that need to be considered for safe installation and use of scaffolding: 1. 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. 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 This means guardrails, a personal fall arrest system or both, depending on the situation. It is used in construction work where the work cannot be done from the ground level. Activate your 30 day free trialto continue reading. A thorough understanding of all aspects of A supported scaffolding height-to-base ratio of . When erected scaffolds are to be moved by crane assure that: a. There are an estimated $90 million dollars lost because of . C. Electricity jumps its normal path and strikes a person The following requirements do not apply to two-point adjustable suspension scaffolds used as masons' or stonesetters' scaffolds. True or False: Once a fall protection device has been inspected by a competent person and deemed safe for use by an employee, it is up to the employee to inspect it regularly and ensure that it still meets OSHA requirements. Do not erect, dismantle or alter a scaffold unless under the supervision of a competent person. Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. Add several tablespoons of table salt to one cup and stir. Pole scaffolds over 60 feet in height shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with that design. Because of this, the following is required: A certified crane operator must be used. Cross-bracing is required on both front and back sides of each scaffold buck or frame. Catenary Scoffold. One who is capable of identifying existing and predictable hazards in the surroundings, or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them is a/n ______________: Providing worker training on the safe use of the equipment being operated is the responsibility of the: To protect against caught-in or -between hazards, a worker should not only avoid wearing loose clothing or jewelry, but also a worker should avoid: Performing maintenance or adjustment on equipment/machinery that hasnt been locked-out. Electrocution, electric shock, burns, indirect (e.g., a fall from a ladder). Scaffolds over 125 feet (38.0 m) in height above their base plates shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with such design. 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. Prevent An Expressway Emergency By Merging Without _____. That's one of the reasons why we need to keep it inspected - for safety sake! 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. Wire ropes shall not be tightened to the extent that the application of a scaffold load will overstress them. You can read the details below. Each wire rope used for securing brackets in place or as an anchorage for personal fall arrest systems shall be protected from damage due to contact with edges, corners, protrusions, or other discontinuities of the supporting structure or scaffold components. 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. When the bearers are coupled to the runners, the couplers shall be as close to the posts as possible. Only employees need to demonstrate and practice safe manual lifting techniques. OSHA 1926.454(c) states: When an employer has 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. a. Subscripts in the reactants must be conserved in the products. Diagonal bracing in both directions shall be installed across the entire inside face of double-pole scaffolds used to support loads equivalent to a uniformly distributed load of 50 pounds (22.7 kg) or more per square foot (929 square cm). Boatswains' chair seat slings shall be reeved through four corner holes in the seat; shall cross each other on the underside of the seat; and shall be rigged so as to prevent slippage which could cause an out-of-level condition. ", "Form scaffolds and carpenters' bracket scaffolds. A. Scaffold base must be set on base plates and an adequate sill or pad to prevent slipping or sinking and fixed therto wher required. Erecting Scaffolding Safely. Personal Fall Arrest System. B. 7. These rules were combined under the umbrella of OSHA. 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. Ensure the surface on which the scaffold will be erected is firm, level and capable of According to OSHA standard 1926.451 (g) (1), anyone working on a scaffold more than 10 feet above a lower level must be protected from falling to that lower level. It provides a safe and stable platform for workers adequately support the loads and how it is used construction! Fall from a ladder )., then: you must clean disinfect! Users to be moved by crane assure that: a rigid means from an overhead structure module often... 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a scaffold must be erected plumb, square, and level because
