Scaffolds are fabricated from many materialssome common, and others not so The three main scaffold types are aerial lifts, supported scaffolds and: A. Tubular scaffolds It is used in construction work where the work cannot be done from the ground level. True or False: There is usually some form of warning before a cave-in. Frames and panels shall be braced by cross, horizontal, or diagonal braces, or combination thereof, which secure vertical members together laterally. 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. Scaffolds are a type of temporary work platform that is used to support workers, tools and materials. Any part of a building or structure used to support the scaffold shall be capable of supporting the maximum intended load to be applied. 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 two or more scaffolds are used they shall not be bridged one to another unless they are designed to be bridged, the bridge connections are articulated, and the hoists are properly sized. common. Frequently used types of scaffolds include the If bridges are not used, passage may be made from one platform to another only when the platforms are at the same height and are abutting. Personal Fall Arrest System. B. Scaffolds may only be designed, set up, used, or maintained in accordance with: Platforms shall not extend outward beyond the base supports of the scaffold unless outrigger frames or equivalent devices are used to ensure stability. D. All of the above. Overhead supporting members (roof structure, ceiling beams, or other structural members) shall be inspected and checked for strength before the scaffold is erected. 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. 1926.454 Suspension scaffold rigging must at least 6 times the intended load. 9. OSHA promulgated the Final Rule for Powered Industrial Truck Operator Training [29 CFR 1910.178(1)], which: Requires operator training and licensing as well as periodic evaluations of operator performance. Safety nets must be strong enough to support workers who fall, and must: Have small enough mesh openings that employee doesnt fall through net itself. Plan the scaffolding setup a few weeks before the start of the project to make sure the scaffold fits the site. Place the planks. sawhorses; others are much more complex, such as the scaffolds erected hundreds of Scaffolds must be braced by cross, horizontal, or diagonal braces, or a combination thereof. Yet, because of the nature of where and how it is used, scaffolding can present many potential hazards. C. Electricity jumps its normal path and strikes a person DO NOT ERECT, DISMANTLE OR ALTER A SCAFFOLD unless under the supervision of a qualified person. Because of this, the following is required: A certified crane operator must be used. Splice plates of other materials of equivalent strength may be used. On straight run scaffolds, longitudinal bracing across the inner and outer rows of posts shall be installed diagonally in both directions, and shall extend from the base of the end posts upward to the top of the scaffold at approximately a 45 degree angle. 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? Engineering and Administrative Controls. Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk 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). Poles shall be secured to the structure by rigid triangular bracing or equivalent at the bottom, top, and other points as necessary. Horizontally at each end and at 30 feet intervals measured from one end only. Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. There are an estimated $90 million dollars lost because of . Employees working in the vicinity of a crane must take care to avoid what kind of accident? 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. U-bolt wire rope clips shall not be used on any wire rope used to secure brackets or to serve as an anchor for personal fall arrest systems. D. A hole of any shape with a depth that exceeds 15 feet. Resist penetration by objects and absorb the shock of a blow. When horses are arranged in tiers, each tier shall be crossbraced. Plumb and level the scaffold as it is being erected. 2. Catenary Scoffold. The SlideShare family just got bigger. Scaffold platforms must be fully decked or planked. Two-point scaffolds shall not be bridged or otherwise connected one to another during raising and lowering operations unless the bridge connections are articulated (attached), and the hoists properly sized. 2. Let us know about it through the REPORT button at the bottom of the page. B. Bamboo scaffolds The blocks for fiber or synthetic ropes shall consist of at least one double and one single block. 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. All joints must be 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. One or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames, or similar rigid supports. Find a more appropriate tool that doesnt cause debris to fly Do not abuse or misuse the scaffold equipment. 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. 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. In the United States and Canada, most scaffolds found at jobsites are made of steel, 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. When horses are arranged in tiers, the legs of each horse shall be nailed down or otherwise secured to prevent displacement. Correct answer Special care and training incentives By whitelisting SlideShare on your ad-blocker, you are supporting our community of content creators. Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. Scaffolds shall not exceed three tiers in height, and shall be so constructed and arranged that one square rests directly above the other. 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. No modifications or additions that affect the capacity or safe operation of a crane or derrick should ever be made without: The manufacturers written approval, which should be kept on file. 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 . A thorough understanding of all aspects of No handhold available. OSHA requires that all excavations in which employees could potentially be exposed to cave-ins be protected by one or more of the following three methods: The formula for all simple slope excavations 20 feet (6.11 meters) or less deep states that for every foot of depth, the trench must be excavated back: Trench boxes or shields must be designed or approved by: Shoring or shielding is most often used when: The location or the depth of the excavation makes sloping back to the maximum allowable slope impractical. Be supported by bearing blocks securely attached to the poles. The scaffold must rest on a firm foundation, be plumb and braced to prevent swaying. Ensure the surface on which the scaffold will be erected is firm, level and capable of potential hazards that employers and workers need to be aware of so they can take the While scaffolding means individual components such as couplers, tubes, and other materials that we assemble to form scaffold. Scaffolds shall be suspended from metal outriggers, brackets, wire rope slings, hooks, or means that meet equivalent criteria (e.g., strength, durability). Because using cranes or derricks to hoist personnel poses a serious risk to the employees being lifted, any cranes and derricks that hoist personnel must: A. 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. Electric shock occurs when: A. Found a mistake? fScaffolding A registered professional engineer must design and certify scaffolds: with wood poles and over 60 feet in height frame scaffolds over 125 feet in height outrigger scaffolds plus scaffold erections when intended loads exceed tube and coupler scaffold standard ratings USA (v. 2008) fTypes of Scaffolds USA (v. 2008) fSupported Scaffolds Surfaces on which stilts are used shall be flat and free of pits, holes and obstructions, such as debris, as well as other tripping and falling hazards. Electricity travels in closed circuits, and its normal route is through a conductor. Before the start of each work shift, it is mandatory that: A competent person inspects the scaffold before the start of each work shift. In addition to the applicable requirements of 1926.451, the following requirements apply to the specific types of scaffolds indicated. disadvantages. 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. Prior to starting all demolition operations, OSHA 1926.850 (a) requires that an engineering survey of the structure be conducted by a competent person. Finally, while the scaffold is being erected or dismantled, the workers who are performing that task need a safe access. B. Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. Rope connections shall be such that the platform cannot shift or slip. C. Always use a PFAS when working over an unguarded or uncovered opening more than six feet above a lower level Every degree that the scaffold is off leveled will be magnified as the scaffold is raised in height. 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 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). Mechanical demolition refers to demolition using equipment like: A. Wrecking balls or jackhammers Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. Scaffolding refers to the plant components and materials that, when assembled, form a scaffold. A scaffold should always be erected: Choose one answer. Wire ropes shall be continuous and without splices between anchors. Platforms shall be secured to the brackets in a manner that will prevent the separation of the platforms from the brackets and the movement of the platforms or the brackets on a completed scaffold. They come in a variety of styles and are made from many different materials. The scaffold assembly must be designed to comply with Local, State and Federal safety requirements. 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. 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 These hooks shall be so placed that they will prevent the platform from falling if one of the horizontal wire ropes breaks. 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. Ensure that all scaffold parts are inspected before use to ensure they are in good repair and suitable for use. Suspension ropes and cables shall be connected to the overhead supporting members by shackles, clips, thimbles, or other means that meet equivalent criteria (e.g., strength, durability). That's one of the reasons why we need to keep it inspected - for safety sake! 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. 5% b. If this is the approach at your job site, then: You must clean and disinfect the eyewear between each use. Outrigger beams fabricated in the shape of an I-beam or channel shall be placed so that the web section is vertical. Looks like youve clipped this slide to already.
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