Free access to premium services like Tuneln, Mubi and more. Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. Unsafe scaffolding has the potential to result in death or serious . When balancing a chemical equation. . Choose one answer. Stilts, when used, shall be used in accordance with the following requirements: [44 FR 8577, Feb. 9, 1979; 44 FR 20940. Prior to starting all demolition operations, OSHA 1926.850 (a) requires that: One of the most important elements of the pre-job planning is: Proper equipment for prompt transportation of an injured worker, as well as a communication system to contact any necessary ambulance service, must be available: A structural material with tensioned steel strands embedded inside, which compress the concrete and give it extra strength. Scaffolds shall be braced by cross, horizontal, or diagonal braces, or combination thereof, to prevent racking or collapse of the scaffold and to secure vertical members together laterally so as to automatically square and align the vertical members. Review the foundation. Scaffolds, once properly erected, are a control measure to prevent the risk of persons and objects falling when working at height. The circuit becomes part of the conductor An access ladder or equivalent safe access must be provided. which of the following statements is false? Additional requirements applicable to specific types of scaffolds. 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. 1. Many precautions must be taken before scaffolding work can commence. Find a more appropriate tool that doesnt cause debris to fly A scaffold is a temporary structure that supports access or working platforms. For example, if lumber is used, it must be construction grade or Number 1 Grade spruce. proper measures to protect against or prevent accidents and injuries. On scaffolds whose length is less than their height, such bracing shall be installed from the base of the end posts upward to the opposite end posts, and then in alternating directions until reaching the top of the scaffold. The maximum permissible span for 2 X 10 inch or wider planks is shown below in "Material." . Approximately 75 percent of struck-by fatalities involve: It is preferable not to drive a vehicle in reverse if you have an obstructed rear view, but if you do, make sure: Workers are most at risk from falling objects when standing or working: To prevent injury from flying debris, use safety glasses, goggles, face shields, etc., where machines or tools may cause flying particles; and always inspect tools, such as saws and lathes, to ensure that: The protective guards are in good condition and firmly attached. Bearers shall extend beyond the posts and runners, and shall provide full contact with the coupler. Specific requirements are described below. Ropes or hangers shall be used for supports, except that one end of a needle beam scaffold may be supported by a permanent structural member. Ensure the scaffold has not been compromised by snow or ice conditions. Scaffold platforms shall not be bridged one to another. 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. 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. Scaffold platforms must be fully decked or planked. 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. Not tied. Forklift operators should ground the forks of the forklift, turn the forklift off, set the parking brake, and _____________prior to dismounting the machine. Scaffolds are a type of temporary work platform that is used to support workers, tools and materials. Personal Fall Arrest System. C. Both A and B The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. A. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the direct supervision of a scaffold competent person. C. To send every worker home whole and healthy every day The sheaves of all blocks shall fit the size of the rope used. each of the hazards. B. 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. Scaffolds shall be used only for the purpose of working at the window opening through which the jack is placed. Your lines should be perfectly vertical (plumb) and horizontal (level), and your corners should be exactly 90 degrees (square). Erected scaffolds should be continually inspected by users to be sure that they are maintained in safe condition. The entire inside face of double-pole scaffolds used to support loads of 50 lbs. 2. Faults: Damaged. D. A hole of any shape with a depth that exceeds 15 feet. A scaffold should always be erected: Choose one answer. 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When erected scaffolds are to be moved by crane assure that: a. The frames must be plumb and level and spaced to adequately support the loads. Damaged or deteriorated equipment must not be used USA (v. 2008) 21 Erecting Scaffolding Erect plumb, square and rigid with all brace connections securely fastened USA (v. 2008) 22 Tubular Welded-frame Scaffolds Be sure scaffold stays plumb and level as erection progresses For mobile scaffolds, use a horizontal diagonal brace, for C. Electricity jumps its normal path and strikes a person and must be provided on any scaffold 10 feet or more above a lower level. ", "Single-point adjustable suspension scaffolds.". 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. Bracing shall be installed as close as possible to the intersection of the bearer and post or runner and post. Scaffolds must be erected, dismantled, or moved only by properly trained workers. OSHA MODULE 5 Scaffolds Personal Fall Arrest System. Couplers shall be of a structural metal, such as drop-forged steel, malleable iron, or structural grade aluminum. Personal Fall Arrest System. Scaffolds are plumb, square, level and situated on base . uses. To prevent their displacement, platform units shall be nailed, bolted, or otherwise secured to outriggers. 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. Platforms shall be of the ladder-type, plank-type, beam-type, or light-metal type. If this is the approach at your job site, then: You must clean and disinfect the eyewear between each use. When wood poles are constructed of two continuous lengths, they shall be joined together with the seam parallel to the bracket. 15% c. 20% d. 25% 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. D. Static electricity gathers outside the circuit. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. A staging area is available. B. Electricity travels in closed circuits, and its normal route is through a conductor. Scaffold casters and wheels shall be locked with positive wheel and/or wheel and swivel locks, or equivalent means, to prevent movement of the scaffold while the scaffold is used in a stationary manner. 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. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the supervision of a scaffold competent person. The upper tiers shall stand on a continuous row of planks laid across the next lower tier, and shall be nailed down or otherwise secured to prevent displacement. 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. Scaffold 0c8be2a1 9996-490a-99c0-6ef40baed98a. (w) of appendix A to this subpart; "Stilts." (Do not use insulating Styrofoam cups.) 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 Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. Scaffolding by UWM 1. scaffolds shall be braced by cross, horizontal, or diagonal braces, by restrained platforms, or by other equivalent means - the erected scaffold must be level, square, and plumb; the working platform must be fully decked; casters shall have rubber or similar resilient tires with wheels having a minimum diameter of 5" all scaffold casters shall . Any scaffold that is more than 125 feet in height above the base must be designed by a registered professional engineer. When erected and used properly, it serves its function well. Looks like youve clipped this slide to already. By definition a scaffold is a temporary, elevated platform Any part of a building or structure used to support the scaffold shall be capable of supporting the maximum intended load to be applied. If uplift could cause the components to separate, locking pins must be used and the components secured. of first grade manila rope. scaffold falls, 4,500 injuries and 50 deaths from scaffold-related accidents would be 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. Clipping is a handy way to collect important slides you want to go back to later. 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. Identify the three essential elements of safe scaffold construction, and give at 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 . One or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames, or similar rigid supports. Outrigger scaffolds are 3 inches or less from the front edge All brace connections must be secured. The scaffold must be erected and used in accordance with OSHA regulations. 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. 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. 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. General. Prior to starting all demolition operations, OSHA 1926.850 (a) requires that an engineering survey of the structure be conducted by a competent person. Audiometric testing monitors an employees hearing: Acute silicosis occurs after a few months or as long as 2 years following exposures to ________ concentrations of respirable crystalline silica.