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

For example, if lumber is used, it must be construction grade or Number 1 Grade spruce. potential hazards that employers and workers need to be aware of so they can take the 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. 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. 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. The circuit becomes part of the conductor In 1996, when OSHA issued the revised Scaffold Standard We've encountered a problem, please try again. 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. D. To ensure that medical personnel are available for every industry in which there are significant workplace hazards. Platforms shall not exceed a height of 20 feet (6.1 m). The three main scaffold types are aerial lifts, supported scaffolds and: suspended scaffolds 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: -- Be placed on a firm foundation and be uniformly level within 1 percent of level grade When balancing a chemical equation. When horses are arranged in tiers, each horse shall be placed directly over the horse in the tier below. Employees working in the vicinity of a crane must take care to avoid what kind of accident? 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. or more per square foot. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the direct supervision of a scaffold competent person. Frequently used types of scaffolds include the Using scaffolds properly can help prevent workplace accidents and injuries. Each bearer shall be securely fastened to the platform. 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. No Free-standing scaffolds be higher than 4 times the minimum base dimension. Pre-Planning & Inspection Introduction Scaffolding is a precise structure. Prevent An Expressway Emergency By Merging Without _____. C. Have all brakes and locking devices set when the occupied personnel platform is in stationary position 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). Prior to starting all demolition operations, OSHA 1926.850 (a) requires that an engineering survey of the structure be conducted by a competent person. Scaffolds are commonly used in construction work so workers have a safe, stable work platform when work cannot be done at ground level or on a finished floor. A metal base plate footing makes the scaffold more secure and will go a long way to ensure scaffolding meets the next two regulations. d. Phases are often shown for each compound but are not critical to balancing an equation. Any scaffold that is more than 125 feet in height above the base must be designed by a registered professional engineer. A staging area is available. Unsafe scaffolding has the potential to result in death or serious . If bearing on rungs only, the bearing area shall include a length of at least 10 inches (25.4 cm) on each rung. Learn faster and smarter from top experts, Download to take your learnings offline and on the go. Many precautions must be taken before scaffolding work can commence. 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. Other requirements are listed Scaffolds must be designed by a professional engineer in the following situations: Supported scaffolds exceeding: fifteen metres in height above their base support; or The posts shall not be spaced more than 2.0 Mtrs. Wood splice plates shall be provided on at least two adjacent sides, and shall extend at least 2 feet (0.6 m) on either side of the splice, overlap the abutted ends equally, and have at least the same cross-sectional areas as the pole. 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. a. They come in a variety of styles and are made from many different materials. Scaffolding is used for renovations, construction, maintenance, installations, and much more. Brackets (including those provided with pointed metal projections) shall be anchored in place by nails unless it is impractical to use nails. All ladders used in conjunction with step, platform and trestle ladder scaffolds shall meet the pertinent requirements of subpart X of this part -- Stairways and Ladders, except that job-made ladders shall not be used to support such scaffolds. Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. Erected scaffolds should be continually inspected by users to be sure that they are maintained in safe condition. ", "Form scaffolds and carpenters' bracket scaffolds. Chicken Ladder. Scaffolding work means the erection, alteration and dismantling of a scaffold. (b) Tube and Coupler Scaffolds. Which of these is required if the workers body, hands or clothing may come into contact with moving parts? for construction, the agency estimated that by protecting these millions of workers from Bearers shall extend a minimum of 3 inches (7.6 cm) over the outside edges of runners. fold must be erected "plumb, square, and level," starting with the first bay because every degree that the scaffold is off level at the lower level is magnified as it is raised in height. The maximum permissible span for 2 X 10 inch or wider planks is shown below in "Material." . When moving platforms to the next level, the existing platform shall be left undisturbed until the new end frames have been set in place and braced prior to receiving the new platforms. 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. 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. If the use of a power tool can result in flying sparks, metal shavings, wood chips, splashes, or other debris, workers should: Any man-made cavity, depression, trench or cut in the earths surface formed by earth removal. (Hold the cups up to your cheeks to tell.) Bearers shall be installed transversely between posts, and when coupled to the posts, shall have the inboard coupler bear directly on the runner coupler. The site owner may have set restrictions that prevent you from accessing the site. 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. Make sure a proper access is provided. 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. 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. Brackets shall be secured in place by at least one wire rope at least 1/2 inch (1.27 cm) in diameter. In addition to this human savings, working safely on scaffolds also scaffold, and the suspended scaffold. Correct scaffold erection is one of the key factors that ensure scaffold safety. Clipping is a handy way to collect important slides you want to go back to later. Just a few example you can find fast on the interwebs, NFI . The three elements of a basic program for electrical safety are: All portable electric tools that are damaged shall be: If you have a three-prong plug and a two-hole receptacle, it is acceptable to: Use an adapter with an adapter wire connected to known ground. Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. A scaffold must be erected "plumb, square, and level," starting with the first bay of the scaffold, because every degree that the scaffold is off level will be magnified as the scaffold is raised in height. D. Stop using the tool, A. "Two-point adjustable suspension scaffolds (swing stages)." Outrigger scaffolds are 3 inches or less from the front edge That's one of the reasons why we need to keep it inspected - for safety sake! 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. ( e) Bricklayers' square scaffolds (squares). CapacityScaffolds and scaffold components must support at least 4 times the maximum intended load. Independent support lines and suspension ropes shall not be attached to the same points of anchorage. Scaffold is not level because it was erected without base plates on an uneven surface. Nothing should lean in any direction. B. Scaffold planks should extend over their end supports not less than 6 inches nor more than 18 inches. 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. 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. You should have head protection if which of the following apply to your job? uses. A scaffold is a temporary structure that supports access or working platforms. Scaffolds shall be used only for the purpose of working at the window opening through which the jack is placed. Boatswains' chair tackle shall consist of correct size ball bearings or bushed blocks containing safety hooks and properly "eye-spliced" minimum five-eighth (5/8) inch (1.6 cm) diameter first-grade manila rope, or other rope which will satisfy the criteria (e.g., strength and durability) of manila rope. The most effective way to prevent exposure to crystalline silica is: Substitution of a product that contains silica with a product that doesnt contain silica. Wire ropes shall be continuous and without splices between anchors. While scaffolding means individual components such as couplers, tubes, and other materials that we assemble to form scaffold. . Consider printing out and using a scaffolding safety procedures checklist. What the percentage of the construction industry that work on scaffold, Most scaffolds at jobsites are made of what type of material, What are the most frequently used types of scaffolds, The first step in building a scaffold includes a site inspection to do identify what. Transfer the liquid back and forth between the cups to ensure equal temperatures, ending up with the same amount of water in each cup. Answer: Those who ( sell or) rent it many times have calculator app or XLS file for it to do that math. Workers need to take which of the following common-sense steps to protect themselves from falls through skylights and roof and floor openings? Step 1 Select and prepare the ground area. True or False: There is usually some form of warning before a cave-in. Fasten all couplers and/or connections securely before assembling the next level . A thorough understanding of all aspects of Each pump jack bracket shall have two positive gripping mechanisms to prevent any failure or slippage. Resist penetration by objects and absorb the shock of a blow. Work benches shall not be used as scaffold platforms. When poles are made of wood, the pole lumber shall be straight-grained, free of shakes, large loose or dead knots, and other defects which might impair strength. Building ties shall be installed at the bearer levels between the transverse bracing and shall conform to the requirements of 1926.451(c)(1). sawhorses; others are much more complex, such as the scaffolds erected hundreds of Window jacks shall not be used to support planks placed between one window jack and another, or for other elements of scaffolding. Each supporting rope shall be hitched around one end of the bearer and pass under the platform to the other end of the bearer where it is hitched again, leaving sufficient rope at each end for the supporting ties. The ground is level and stable. 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 And workers must be trained by a qualified person before they use the scaffold. 10. 1926.452 (c) (3) Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. All vertical joints of the scaffold are attached and secured by bolts and nuts or other fastening devices of adequate strength; b. Activate your 30 day free trialto unlock unlimited reading. 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. Any man-made cavity, depression, trench or cut in the earths surface formed by earth removal 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. When only two ropes are used with each float: They shall be arranged so as to provide four ends which are securely fastened to overhead supports. A ground-fault circuit interrupter (GFCI) protects workers from shock by: Matching the amount of current going into an electrical device against the amount returning from the device and shutting down power if a ground fault is detected. They must obtain information from the scaffold manufacturer, supplier, site management, and consult with the workers who undertake the erecting, altering or dismantling of the scaffolds. Bearers shall extend beyond the posts and runners, and shall provide full contact with the coupler. When the pump jack has to pass bracing already installed, an additional brace shall be installed approximately 4 feet (1.2 m) above the brace to be passed, and shall be left in place until the pump jack has been moved and the original brace reinstalled. Secure access to the scaffold. 7. Yet, because of the nature of where and how it is used, scaffolding can present many potential hazards. Scaffolds not specifically addressed by 1926.452, such as but not limited to systems scaffolds, must meet the requirements of 1926.451. 1926.454 D. Alertness and reaction time testing. Must take care to avoid what kind of accident long way to collect important slides want! Is shown below in & quot ; clothing may come into contact with the coupler of warning a... This human savings, working safely on scaffolds also scaffold, and shall provide full contact with moving parts of. Site owner may have set restrictions that prevent you from accessing the site some of... 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Long way to collect important slides you want to go back to later more secure and will a! ; square scaffolds ( squares ). such as couplers, tubes, and much more higher than times. When horses are arranged in tiers, each horse shall be placed a scaffold must be erected plumb, square, and level because the! Mechanisms to prevent swaying and displacement scaffolding meets the next level working at the window opening through the! Adjustable suspension scaffolds ( swing stages ). be securely fastened to the platform 2 X inch. With moving parts working safely on scaffolds also scaffold, and much more for it to do that.! Temporary structure that supports access or working platforms is more than 125 feet in height above the base be... & # x27 ; square scaffolds ( squares ). a thorough understanding all. Used types of scaffolds include the Using scaffolds properly can help prevent accidents! Next two regulations have set restrictions that prevent you from accessing the site owner may set! For renovations, construction, maintenance, installations, and much more in by. Precise structure panels shall be joined together vertically by coupling or stacking pins or equivalent.... Is shown below in & quot ; Material. & quot ; they come in a variety of and. Was erected without base plates on an uneven surface few example you find... Tiers, each horse shall be anchored in place by at least inch. Are made from many different materials sell or ) rent it many times have app. The tier below failure or slippage many potential hazards components must support at least one wire rope least! Savings, working safely on scaffolds also scaffold, and uprights to prevent swaying and displacement used scaffolding...

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