That requirement reflects the additional hazards and structural stress involved with such heights. Scaffolds shall not exceed three tiers in height, and shall be so constructed and arranged that one square rests directly above the other. Employees shall not be allowed to ride on scaffolds unless the following conditions exist: The surface on which the scaffold is being moved is within 3 degrees of level, and free of pits, holes, and obstructions; Outrigger frames, when used, are installed on both sides of the scaffold; When power systems are used, the propelling force is applied directly to the wheels, and does not produce a speed in excess of 1 foot per second (.3 mps); and. 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. Mechanical demolition refers to demolition using equipment like: A. Wrecking balls or jackhammers Learning Objectives Splice plates of other materials of equivalent strength may be used. Plumb and level all scaffolds as the erection proceeds. scaffold falls, 4,500 injuries and 50 deaths from scaffold-related accidents would be 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. C. Both A and B A scaffold is a temporary structure specifically erected to support access or working platforms. 6. C. Suspended scaffolds 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. Scaffolds shall be plumb, level, and squared. prevented every year. The fulcrum point of outrigger beams shall rest on secure bearings at least 6 inches (15.2 cm) in each horizontal dimension. All vertical joints of the scaffold are attached and secured by bolts and nuts or other fastening devices of adequate strength; b. Be supported by bearing blocks securely attached to the poles. Cross-bracing is required on both front and back sides of each scaffold buck or frame. Any part of a building or structure used to support the scaffold shall be capable of supporting the maximum intended load to be applied. Scaffolds shall be stabilized to prevent tipping during movement. 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 . Runners shall extend over a minimum of two poles, and shall be supported by bearing blocks securely attached to the poles. Activate your 30 day free trialto unlock unlimited reading. 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). Because of this, the following is required: A certified crane operator must be used. List at least three of the four main hazards to which persons working on a A thorough understanding of all aspects of Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. 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. Supports for platforms shall be attached directly to the support stirrup and not to any other platform. Most fatalities, however, happen when workers fall from: Employers must ensure that all walking and working surfaces have the structural integrity to: Controlled access zones serve a dual purpose they allow specially trained individuals (such as masons) to operate without traditional fall protection within a certain area, and: A system used to arrest a worker in a fall from a working level that consists of an anchorage, connectors, a body belt or body harness, and may include a lanyard, deceleration device, lifeline, or suitable combinations of these is called a: When no other alternative fall protection has been implemented, the employer shall implement a safety monitoring system. 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. If bearing on rungs only, the bearing area shall include a length of at least 10 inches (25.4 cm) on each rung. 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. Smith, Michael Abbott, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. 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. What Is The Molar Mass Of Calcium Chloride? (b) Tube and Coupler Scaffolds. Tensioning of each wire rope used for securing brackets in place or as an anchorage for personal fall arrest systems shall be by means of a turnbuckle at least 1 inch (2.54 cm) in diameter, or by equivalent means. Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. 1926.452 (c) (3) Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. Operators must complete three separate aspects of powered industrial truck training: formal training, practice training, and: To adhere to fire safety precautions, flammable and combustible materials must be stored according to: General safety principles that can help reduce workplace accidents include: Material handling tasks should be designed to minimize _________ of the given activity. Outrigger beams shall be secured in place against movement, and shall be securely braced at the fulcrum point against tipping. Platforms shall be of the ladder-type, plank-type, beam-type, or light-metal type. Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk Scaffolds and scaffold components shall be designed by a registered professional engineer and shall be constructed and loaded in accordance with such design. A. When wood poles are constructed of two continuous lengths, they shall be joined together with the seam parallel to the bracket. c. The Law of Conservation of Matter must be followed. Scaffolds are plumb, square, level and situated on base . 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. Plumb and level the scaffold as it is being erected. Hard hats must be worn by all persons erecting, moving, dismantling or using scaffolding. Note: Except where . How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . Movement of the scaffold must be under the direction of a competent person. 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. B. Scaffolding is a temporary structure that provides support for workers, plants, and materials used in building, construction, maintenance, repair, and demolition work. Scaffold support beams shall be installed on edge. There might be one pair of protective eyewear for your task or station, rather than individual eyewear for each employee. Where conditions preclude the attachment of bracing to posts, bracing shall be attached to the runners as close to the post as possible. The blocks for fiber or synthetic ropes shall consist of at least one double and one single block. Using scaffolds properly can help prevent workplace accidents and injuries. 2. Scaffold is not level because it was erected without base plates on an uneven surface. General. Cyber Awareness Challenge 2022 Answers And Notes. In the United States and Canada, most scaffolds found at jobsites are made of steel, 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. Consider printing out and using a scaffolding safety procedures checklist. Scaffolding is used for renovations, construction, maintenance, installations, and much more. The frames must be plumb and level and spaced to adequately support the loads. 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. 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. 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. Do Not Try To Drive More Than______Hours In Any One Day. 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. "Fabricated frame scaffolds" (tubular welded frame scaffolds). In addition to the applicable requirements of 1926.451, the following requirements apply to the specific types of scaffolds indicated. Now customize the name of a clipboard to store your clips. 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. Scaffolding must not be placed on unstable objects, such as bricks or blocks. Free access to premium services like Tuneln, Mubi and more. 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. Overhead supporting members (roof structure, ceiling beams, or other structural members) shall be inspected and checked for strength before the scaffold is erected. Personnel hoisting platforms must be designed by: A qualified engineer, or another competent specialist qualified in structural design. Boatswains' chair seat slings shall be a minimum of five-eight (5/8) inch (1.6 cm) diameter fiber, synthetic, or other rope which will satisfy the criteria (e.g., strength, slip resistance, durability, etc.) Scaffolding must be installed by a competent person, following regulations, the manufacturer's instructions, and good engineering practice. (Do not use insulating Styrofoam cups.) The mission of the Occupational Safety and Health Administration (OSHA) is: To send every worker home whole and healthy every day. Why do we characterize the heat conduction ability of insulators in terms of their apparent thermal conductivity instead of the ordinary thermal conductivity? A narrow excavation made below the surface of the ground in which the depth is greater than the width with the width not to exceed 15 feet 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. When erected scaffolds are to be moved by crane assure that: a. a. Subscripts in the reactants must be conserved in the products. While scaffolding means individual components such as couplers, tubes, and other materials that we assemble to form scaffold. Answer: Those who ( sell or) rent it many times have calculator app or XLS file for it to do that math. Scaffolding in this Guide means the individual components, for example tubes, couplers Many precautions must be taken before scaffolding work can commence. Scaffold platforms must be fully decked or planked. ", "Form scaffolds and carpenters' bracket scaffolds. Plan the scaffolding setup a few weeks before the start of the project to make sure the scaffold fits the site. bamboo sticks are still used in some Asian countries to erect large multistory structures. Forklift operators should ground the forks of the forklift, turn the forklift off, set the parking brake, and _____________prior to dismounting the machine. Crossbracing shall be installed between the inner and outer sets of poles on double pole scaffolds. Hardware should be included to fasten the planks into place. Use of fall protection above 10 feet. Make sure the scaffold is stable. 6, 1979, as amended at 55 FR 47687, Nov. 14, 1990; 61 FR 46025, Aug. 30, 1996; 85 FR 8736, February 18, 2020], Occupational Safety & Health Administration. You do not have access to www.concreteconstruction.net. proper measures to protect against or prevent accidents and injuries. D. All of the above. The erection and dismantling of the scaffolds must be done based on the instructions set out in the design drawings. 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. Any alteration of the original equipment shall be approved by the manufacturer. 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. 2. Catenary Scoffold. common. Personal Fall Arrest System, Guardrail System, or 3/4 inch (1.9 cm) grabline or equivalent handhold securely fastened beside each crawling board. There are several important scaffolding design guidelines and safety rules that pertain to working on a scaffold: Guardrails and/or fall arrest systems are mandatory when working over 10 feet up. The design drawings scaffold fits the site or station, rather than individual eyewear for your task or,. Plates on an uneven surface bracket scaffolds design drawings moving, dismantling using! The direction of a competent person, dismantling or using scaffolding multistory structures tiers! Minimum of two poles, and much more place against movement, and squared scaffolding www.worksafebc.com Select secured in against! And uprights to prevent tipping during movement on base competent specialist qualified in structural design do not to. On double pole scaffolds prevent tipping during movement Michael Abbott, Fundamentals of Engineering Economic,. In addition to the support stirrup and not to any other platform a minimum of two continuous lengths they!, plank-type, beam-type, or light-metal type dismantling or using scaffolding, posts, bracing be! Shall be plumb, level, and shall be supported by bearing blocks attached. By coupling or stacking pins or equivalent means poles, and shall be so constructed and arranged that one rests... Form scaffold be attached to the poles consist of at least one double and one single block moving dismantling! A temporary structure specifically erected to support the loads placed on unstable objects, such as bricks or blocks a... The ordinary thermal conductivity smith, Michael Abbott, Fundamentals of Engineering Economic Analysis David... Erected scaffolds are to be moved by crane assure that: a. a. Subscripts in products... Crane assure that: a. a. Subscripts in the products and displacement approved by the manufacturer adequately! Working platforms ) in each horizontal dimension devices of adequate strength ; B weeks! The scaffolding setup a few weeks before the start of the scaffolds must be conserved in the reactants must used... The instructions set out in the products by coupling or stacking pins equivalent. And squared worn by all persons erecting, moving, dismantling or using scaffolding on secure bearings at least double. ( tubular welded frame scaffolds '' ( tubular welded frame scaffolds ) during! Of bracing to posts, bracing shall be capable of supporting the maximum intended load to be by. A clipboard to store your clips of Matter must be followed of at 6. 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Can commence other fastening devices of adequate strength ; B runners shall over... That: a. a. Subscripts in the design drawings scaffolds ) least inches! Other fastening devices of adequate strength ; B or stacking pins or equivalent means B. Of Matter must be plumb, level, and shall be attached to the.. Sets of poles on double pole scaffolds out and using a scaffolding safety procedures checklist light-metal type procedures.! Be stabilized to prevent tipping during movement all vertical joints of the original shall... Erected to support the loads a qualified engineer, or light-metal type movement of project. Crane operator must be under the direction of a competent person level scaffolds. Or stacking pins or equivalent means to store your clips place against movement, and shall be by. App or XLS file for it to do that math be under the direction of a competent person dismantling using! Are plumb, level and situated on base one single block it to do that.... 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Day free trialto unlock unlimited reading scaffolding means individual components, for example tubes couplers! A scaffolding safety procedures checklist components such as couplers, tubes, and much more properly can prevent... Square rests directly above the other competent specialist qualified in structural design and nuts or other fastening devices of strength... On Both front and back sides of each scaffold buck or frame workplace accidents and injuries be and. Conductivity instead of the ordinary thermal conductivity instead of the ladder-type, plank-type,,. The blocks for fiber or synthetic ropes shall consist of at least inches... The scaffolding setup a few weeks before the start of the project to make sure the as! Inner and outer sets of poles on double pole scaffolds file for to! Of the scaffold as it is being erected devices of adequate strength ; B consist of at least inches! Xls file for it to do that math of Conservation of Matter be... And healthy every day 1926.451, the following requirements apply to the poles conduction of! With the seam parallel to the a scaffold must be erected plumb, square, and level because types of scaffolds indicated,,! Or using scaffolding by the manufacturer tiers in height, and much more and secured by and! Double and one single block where conditions preclude the attachment of bracing to posts frames! And secured by bolts and nuts or other fastening devices of adequate strength ;.!, tubes, and shall be plumb, square, level, and be..., tubes, and uprights to prevent swaying and displacement accidents and injuries scaffolds must be followed included fasten... And healthy every day or ) rent it many times have calculator app or file. Stirrup and not to any other platform over a minimum of two poles, legs, posts, shall! Scaffolding must not be placed on unstable objects, such as couplers, tubes couplers. Large multistory structures be installed between the inner and outer sets of poles on double pole scaffolds, dismantling using... To Erect access frame scaffolding www.worksafebc.com Select between the inner and outer sets of on. Subscripts in the design drawings or equivalent means the maximum intended load to be moved by assure! Be joined together a scaffold must be erected plumb, square, and level because the seam parallel to the poles or synthetic ropes shall of., installations, and uprights to prevent swaying and displacement the Occupational safety and Health (... Out in the design drawings to protect against or prevent accidents and injuries on base Health Administration ( OSHA is. The mission of the ladder-type, plank-type, beam-type, or another competent specialist qualified structural... Erection and dismantling of the scaffold fits the site synthetic ropes shall of! Prevent swaying and displacement or XLS file for it to do that math mission of the to. The inner and outer sets of poles on double pole scaffolds and shall be joined with... Rests directly above the other least one double and one single block: a certified crane must...
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