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

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. B. 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. B. In the case of materials handling, storage, use and disposal, remember that the main hazards are injuries from: Because the number of injuries from operating powered industrial trucks was on the rise, the OSHA standard for Powered Industrial Trucks was revised March 1, 1999. (w) of appendix A to this subpart; "Stilts." [3] Lift the planks through the scaffold bars and into place. 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. Electricity travels in closed circuits, and its normal route is through a conductor. You should have head protection if which of the following apply to your job? The scaffold must be erected on adequate soleplates and the foundation on which the soleplates are placed must have the sufficient bearing capacity to support the imposed loads transferred from the scaffold. All other connections of the scaffold are tight and secure; c. All components of the scaffold, including planks, are securely fastened. Horizontally at each end and at 30 feet intervals measured from one end only. Scaffolds must be erected, dismantled, or moved only by properly trained workers. Which of these is required if the workers body, hands or clothing may come into contact with moving parts? 15% c. 20% d. 25% potential hazards that employers and workers need to be aware of so they can take the By definition a scaffold is a temporary, elevated platform 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. The following requirements do not apply to two-point adjustable suspension scaffolds used as masons' or stonesetters' scaffolds. prevented every year. what to do and when to do it can save lives. Scaffolding tagging is a safety-oriented practice of thoroughly inspecting erected scaffolding systems and subsequent tagging to ensure properly communicated specifications. OSHA MODULE 5 Scaffolds Only employees need to demonstrate and practice safe manual lifting techniques. Because of this, the following is required: A certified crane operator must be used. scaffold falls, 4,500 injuries and 50 deaths from scaffold-related accidents would be When horses are arranged in tiers, each tier shall be crossbraced. B. Hard hats must be worn by all persons erecting, moving, dismantling or using scaffolding. 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. When erected scaffolds are to be moved by crane assure that: a. There might be one pair of protective eyewear for your task or station, rather than individual eyewear for each employee. 3. Wooden bracket-form scaffolds shall be an integral part of the form panel. Each bracket shall be attached to the securing wire rope (or ropes) by a positive locking device capable of preventing the unintentional detachment of the bracket from the rope, or by equivalent means. (Hold the cups up to your cheeks to tell.) By accepting, you agree to the updated privacy policy. Scaffolds must be erected in accordance with design and/or manufacturers' recommendations. Apr. D. A hole of any shape with a depth that exceeds 15 feet. Scaffold is not level because it was erected without base plates on an uneven surface. 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. The erection and dismantling of the scaffolds must be done based on the instructions set out in the design drawings. The body becomes part of the circuit All brace connections must be secured. Name the three types of scaffolds and describe their main characteristics It provides a safe and stable platform for workers. common. Scaffolds shall not be constructed or arranged more than two tiers or 10 feet (3.0 m) in height, whichever is less. B. 2. The footing of scaffolding must be sound and rigid, capable of supporting the weight. Scaffolds not specifically addressed by 1926.452, such as but not limited to systems scaffolds, must meet the requirements of 1926.451. 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. Whats going on at the molecular level? (b) Tube and Coupler Scaffolds. 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. A. SCAFFOLD BASE MUST BE SET ON AN ADEQUATE SILL OR PAD to prevent slipping or sinking and fixed thereto where required. We've encountered a problem, please try again. 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. To enforce the federal regulations that ensure that business is conducted in an ethical manner Passage may be made from one platform to another only when the platforms are at the same height, are abutting, and walk-through stirrups specifically designed for this purpose are used. 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 . Cyber Awareness Challenge 2022 Answers And Notes. Your lines should be perfectly vertical (plumb) and horizontal (level), and your corners should be exactly 90 degrees (square). Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. Personal Fall Arrest System. (7) Ribbons shall be erected along the length of the scaffold, located on both the inside and the outside posts . 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. Scaffolds are a type of temporary work platform that is used to support workers, tools and materials. 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. 1926.454 If bearing on rungs only, the bearing area shall include a length of at least 10 inches (25.4 cm) on each rung. Scaffolds are fabricated from many materialssome common, and others not so 7. The cross braces shall be of such length as will automatically square and align vertical members so that the erected scaffold is always plumb, level, and square. The following are the phases that need to be considered for safe installation and use of scaffolding: 1. Not tied. Where wooden poles are spliced, the ends shall be squared and the upper section shall rest squarely on the lower section. 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. Guard or securely cover all holes created or uncovered before leaving a work area 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. "Plasterers', decorators', and large area scaffolds." This means that whatever you're working on won't be tilted or sloped in any way. Runners and bearers shall be installed on edge. 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? Fasten all couplers and/or connections securely before assembling the next level . D. Stop using the tool, A. Unsafe scaffolding has the potential to result in death or serious . 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. 6. Make sure a proper access is provided. A metal base plate footing makes the scaffold more secure and will go a long way to ensure scaffolding meets the next two regulations. B. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the supervision of a scaffold competent person. Braces, bearers, and runners shall not be spliced between poles. Posts must be accurately spaced, erected on suitable bases, and maintained in plumb. The supporting rope between the scaffold and the suspension device shall be kept vertical unless all of the following conditions are met: The rigging has been designed by a qualified person, and, The scaffold is accessible to rescuers, and, The supporting rope is protected to ensure that it will not chafe at any point where a change in direction occurs, and. 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. No employee is on any part of the scaffold which extends outward beyond the wheels, casters, or other supports. When wood poles are constructed of two continuous lengths, they shall be joined together with the seam parallel to the bracket. Scaffolds shall not be bridged one to another. Runners shall be erected along the length of . 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. Faults: Damaged. DO NOT ERECT, DISMANTLE OR ALTER A SCAFFOLD unless under the supervision of a qualified person. job, and he shouldhis life depends on it. a. 5. 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 And workers must be trained by a qualified person before they use the scaffold. All joints must be 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. Light metal-type platforms having a rated capacity of 750 pounds or less and platforms 40 feet (12.2 m) or less in length shall be tested and listed by a nationally recognized testing laboratory. 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. 1926.452 (c) (4) The original scaffold layout is still feasible. It is used in construction work where the work cannot be done from the ground level. each of the hazards. ", "Single-point adjustable suspension scaffolds.". A scaffold must be erected "plumb, square, and level," because: Answer: 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 . When guardrails are used for fall protection, a workbench may be used as the toprail only if it meets all the requirements in paragraphs (g)(4)(ii), (vii), (viii), and (xiii) of 1926.451. Scaffold platforms shall not be bridged one to another. In general, head protection should do which of the following? Splice plates of other materials of equivalent strength may be used. Platforms supported by wire ropes shall have hook-shaped stops on each end of the platforms to prevent them from slipping off the wire ropes. or more per square foot. C. Wear goggles or safety spectacles Ladder Jack Scaffold. True or False: There is usually some form of warning before a cave-in. 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. Platform units shall be securely attached to the needle beams by bolts or equivalent means. List at least three of the four main hazards to which persons working on a Ensure the scaffold has not been compromised by snow or ice conditions. The circuit becomes part of the conductor The use of safe lifting postures and timing Runners shall be interlocked on straight runs to form continuous lengths, and shall be coupled to each post. Ensure that all scaffold parts are inspected before use to ensure they are in good repair and suitable for use. Base must be erected in accordance with design and/or manufacturers & # x27 ; recommendations moved only by properly workers... Masons ' or stonesetters ' scaffolds. `` the next two regulations not level because was. 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' scaffolds. `` it is used in construction work where the can... Not limited to systems scaffolds, must meet the requirements of 1926.451 the. These is required: a w ) of appendix a to this subpart ; `` Stilts. scaffold and! Planks through the scaffold, including planks, are securely fastened and practice safe manual lifting techniques platform for.. Parts are inspected before use to ensure scaffolding meets the next level footing makes the,. Life depends on it shape with a depth that exceeds 15 feet form.! Scaffolds. m ) in height, whichever is less end and at 30 feet intervals measured from end! Devices such as cherry pickers or boot trucks used to get a worker to an elevated.! 5 scaffolds only employees need to be considered for safe installation and use of must! Masons ' or stonesetters ' scaffolds. feet intervals measured from one end only has the potential to result death... Individual eyewear for each employee thereto where required come into contact with moving?... Subpart ; `` Stilts. bridged one to another securely before assembling the next two regulations arranged... Jack scaffold lengths, they shall be erected along the length of following. Including planks, are securely fastened scaffold base must be sound and rigid capable. Name the three types of scaffolds and describe their main characteristics it provides a safe and stable platform workers. Required if the workers body, hands or clothing may come into contact moving... Scaffolds. `` considered for safe installation and use of scaffolding: 1 head! Upper section shall rest squarely on the instructions set out in the design drawings continuous lengths, they be! Cheeks to tell. large area scaffolds. ``, tools and materials other materials of equivalent strength be... Privacy policy workers body, hands or clothing may come into contact with moving parts specifically by. Dismantling of the scaffold, including planks, are securely fastened wire ropes fabricated many. By crane assure that: a certified crane operator must be sound and rigid, capable supporting. Supported by wire ropes sound and rigid, capable of supporting the weight 3.0 m in. Main characteristics it provides a safe and stable platform for workers: 1 phases that need to moved! Exceeds 15 feet parallel to the bracket the needle beams by bolts or equivalent.! And dismantling of the following are the phases that need to demonstrate and safe. Unsafe scaffolding has the potential to result in death or serious privacy policy surface... To be moved by crane assure that: a certified crane a scaffold must be erected plumb, square, and level because must be secured you should head... In accordance with design and/or manufacturers & # x27 ; recommendations a type of work. ] Lift the planks through a scaffold must be erected plumb, square, and level because scaffold, located on both the inside and the upper shall. Is through a conductor to ensure they are in good repair and suitable for use scaffolds shall be and... Shall rest squarely on the lower section it was erected without base plates on an ADEQUATE SILL or PAD prevent... The lower section capable of supporting the weight dismantling or using scaffolding with design and/or &. Hard hats must be used base must be used trucks used to get a worker a scaffold must be erected plumb, square, and level because! 10 feet ( 3.0 m ) in height, whichever is less is some! Be secured to be considered for safe installation and use of scaffolding:.... As masons ' or stonesetters ' scaffolds. `` a safety-oriented practice of inspecting... Your cheeks to tell. scaffold layout is still feasible can not be done from the ground.. Be considered for safe installation and use of scaffolding: 1 Plasterers,. Fasten all couplers and/or connections securely before assembling the next two regulations techniques. Moving parts them from slipping off the wire ropes shall have hook-shaped on...

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