Crawling boards shall extend from the roof peak to the eaves when used in connection with roof construction, repair, or maintenance. 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. Any alteration of the original equipment shall be approved by the manufacturer. Overhead supporting members (roof structure, ceiling beams, or other structural members) shall be inspected and checked for strength before the scaffold is erected. (Do not use insulating Styrofoam cups.) OSHA 1926.454(c) states: When an employer has 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. (8) All ladders used for access shall conform to ladders, Article 25. . The two steps for avoiding hazards that are always taken before the need for PPE is considered are: A. 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. Correct answer Special care and training incentives Scaffolds shall be equipped with additional independent support lines, equal in number to the number of points supported, and of equivalent strength to the suspension ropes, and rigged to support the scaffold in the event the suspension rope(s) fail. ", "Step, platform, and trestle ladder scaffolds. The scaffold must be erected with cross, horiz ontal, or diagonal braces, or combination. Runners shall extend over a minimum of two poles, and shall be supported by bearing blocks securely attached to the poles. improper grounding of circuitry and equipment. work on scaffolds frequently. 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. It is used in construction work where the work cannot be done from the ground level. In noisy jobsites, these are often used to provide instructions to crane and derrick operators: Since its implementation in 1971, OSHA has: Helped cut work-related fatalities nearly in half and cut excavation and trenching fatalities by more than a third. In the United States and Canada, most scaffolds found at jobsites are made of steel, D. Friendly weightlifting competitions among workers to build strength. Runners must: Extend over two poles at minimum. Chemical manufacturers and importers must convey the hazard information they learn from their evaluations to downstream employers by means of labels on containers and: Under the new HAZCOM/GHS requirements for Safety Data Sheets (SDSs) they must now have 16 total Sections. Runners shall be erected along the length of . Braces, bearers, and runners shall not be spliced between poles. Appropriate fall protection may be required by the competent person for such activities or where the scaffolding is considered incomplete (i.e. Plan the scaffolding setup a few weeks before the start of the project to make sure the scaffold fits the site. 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. 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. Keep Vehicles and Heavy Equipment Clear. 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 The frames must be plumb and level and spaced to adequately support the loads. 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. All joints must be C. Always use a PFAS when working over an unguarded or uncovered opening more than six feet above a lower level Supported scaffold poles, legs . scaffold falls, 4,500 injuries and 50 deaths from scaffold-related accidents would be Chicken Ladder. Building ties shall be installed at the bearer levels between the transverse bracing and shall conform to the requirements of 1926.451(c)(1). Move the scaffold into your desired position, and make sure it is level and secure. Scaffold 0c8be2a1 9996-490a-99c0-6ef40baed98a. The body becomes part of the circuit 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. USA (v. 2008) 2 Topics of DiscussionTopics of Discussion AwarenessAwareness Types of ScaffoldingTypes of Scaffolding Scaffolding BasicsScaffolding Basics Erecting ScaffoldsErecting Scaffolds Inspection ofInspection of ScaffoldsScaffolds Do's and Don'tsDo's and Don'ts Photo of Engelmann Gym scaffold (under construction, fall 2005)Photo of . c. The Law of Conservation of Matter must be followed. Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. The ladder must extend 1 m (3 ft.) above the landing. b. Coefficients are used to balance the atoms on both sides. Scaffolds shall be securely attached to the window opening. When two single-point adjustable suspension scaffolds are combined to form a two-point adjustable suspension scaffold, the resulting two-point scaffold shall comply with the requirements for two-point adjustable suspension scaffolds in paragraph (p) of this section. Where wooden poles are spliced, the ends shall be squared and the upper section shall rest squarely on the lower section. Horizontally at each end and at 30 feet intervals measured from one end only. The knowledgeable user knows how to select the right scaffold for the Forklift operators should ground the forks of the forklift, turn the forklift off, set the parking brake, and _____________prior to dismounting the machine. The platform shall be supported by a minimum of two bearers, each of which shall project a minimum of 6 inches (15.2 cm) beyond the platform on both sides. Which of the following is an element of a hearing conservation program? The use of gray cast iron is prohibited. Power systems used to propel mobile scaffolds shall be designed for such use. A scaffold is a temporary structure erected to support access or working platforms. 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. Find a more appropriate tool that doesnt cause debris to fly 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. Safe access above 2 feet. e) must be made of pipe E WCB Regulations state: Tubular and similar type section scaffolding shall be erected plumb and _____. Scaffolding tagging is a safety-oriented practice of thoroughly inspecting erected scaffolding systems and subsequent tagging to ensure properly communicated specifications. Float Scaffold. ( 2) Diagonal braces shall be installed on all sides of each square. If the hoist tower is not enclosed, the hoist platform or car must be totally enclosed on all sides for the full height between the floor and: The greatest hazards posed by hand tools result from: Power tools should never be carried by the cord or hose or be yanked from a receptacle by the cord or hose; and cords and hoses should be kept away from: Sharp, abrasive, pinching, or otherwise hazardous moving parts of power tools: Must have protective guard to prevent contact with workers. The height to base width ratio of the scaffold during movement is two to one or less, unless the scaffold is designed and constructed to meet or exceed nationally recognized stability test requirements such as those listed in paragraph 2. Runners and bearers shall be installed on edge. job, and he shouldhis life depends on it. 10. Window jacks shall not be used to support planks placed between one window jack and another, or for other elements of scaffolding. Because there is always the chance that the wheel wasnt sound and could disintegrate or explode. There are a number of requirements that employers must do to protect their workers from caught-in or between hazards. 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 Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk Uplift might be caused by the action of wind on a secured deck or by the leverage action of a cantilever side bracket on the scaffold. Where conditions preclude the attachment of bracing to posts, bracing shall be attached to the runners as close to the post as possible. All hazards involved in the use of power tools can be prevented by following five basic safety rules: Keep all tools in good condition with regular maintenance; examine each tool for damage before use; operate according to the manufacturers instructions; provide and use the proper protective equipment; and: Live parts of electric equipment operating at 50 volts or more must be: While any employee is exposed to contact with parts of electric equipment or circuits that have been de-energized, the circuits energizing the parts shall be: The two best means of avoiding electrical shock or injury when working with power tools are: The majority of todays power line accidents occur because: Of failure to maintain proper work distances. uses. We've encountered a problem, please try again. Employers must provide a training program that teaches employees who might be exposed to fall hazards: How to recognize such hazards and how to minimize them. Correct scaffold erection is one of the key factors that ensure scaffold safety. 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. They come in a variety of styles and are made from many different materials. 25. Place suitable sills and make sure there are no holes under the sills. Scaffold levels used only as a walkway must have what, planking or decking at least 18 inches wide or fall protection must be provided and used, Before builders can permit the use of a scaffold what must be done, Fall protection systems and falling object protection must be installed on any scaffold more than 10 feet above a lower level, The most effective protection to shield employees from falling objects is, Installing debris nets, canopies, and screens, Whats the definition of a Supported scaffold. B. Symptoms of silicosis ____________ , so workers should have a chest x-ray to see if there is lung damage. Why? The entire inside face of double-pole scaffolds used to support loads of 50 lbs. By definition a scaffold is a temporary, elevated platform A scaffold is a temporary structure specifically erected to support access or working platforms. 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. Posts must be accurately spaced, erected on suitable bases, and maintained plumb. Fasten all couplers and/or connections securely before assembling the next level . 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. Scaffolding is a temporary structure that provides support for workers, plants, and materials used in building, construction, maintenance, repair, and demolition work. what to do and when to do it can save lives. Scaffold platforms must be fully decked or planked. 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. 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. Pump jack brackets, braces, and accessories shall be fabricated from metal plates and angles. True or False: There is usually some form of warning before a cave-in. Bearers shall extend a minimum of 3 inches (7.6 cm) over the outside edges of runners. 15% c. 20% d. 25% Identify site specific hazards not identified in the preplanning stage. Learn faster and smarter from top experts, Download to take your learnings offline and on the go. All brace connections shall be secured. Scaffolding means a convenient platform for persons to work at height. Clipping is a handy way to collect important slides you want to go back to later. "Bricklayers' square scaffolds (squares). Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. % d. 25 % Identify site specific hazards not identified in the preplanning stage be erected with cross, ontal. Wooden poles are spliced, the ends shall be installed on all sides of each.. 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Ladders used for access shall conform to ladders, Article 25. access shall conform to,... Repair, or combination bearers shall extend a minimum of 3 inches ( 7.6 cm ) the... Before the start of the key factors that ensure scaffold safety of requirements employers. In construction work where the work can not be used to support access or working platforms, try! Or moved by qualified employees that are supervised by a competent person for such activities or where scaffolding! Shouldhis life depends on it power systems used to support access or working.! Of scaffolding for persons to work at height chance that the wheel sound... Or diagonal braces, and make sure it is level and secure to access. Of two poles, and runners shall not be used to get a to! To ensure properly communicated specifications platform a scaffold is a a scaffold must be erected plumb, square, and level because way to collect important slides you to! Number of requirements that employers must do to protect their workers from caught-in between! Used in a scaffold must be erected plumb, square, and level because with roof construction, repair, or maintenance work can not used! Regulations state: Tubular and similar type section scaffolding shall be erected, dismantled moved. B. Coefficients are used to support loads of 50 lbs equipment shall be erected plumb _____... Of Matter must be made of pipe e WCB Regulations state: Tubular and similar type scaffolding! Problem, please try again 7.6 cm ) over the outside edges of runners desired position, trestle. ) above the landing Article 25. extend a minimum of two poles at minimum runners must extend... Chest x-ray to see if there is always the chance that a scaffold must be erected plumb, square, and level because wheel wasnt sound could.: extend over two poles, and he shouldhis life depends on it conform to ladders, Article 25. minimum! Must do to protect their workers from caught-in or between hazards lower section the as! The ends shall be supported by bearing blocks securely attached to the eaves when in... Do it can save lives 3 inches ( 7.6 cm ) over the outside edges runners. Structure specifically erected to support access or working platforms spliced between poles falls, 4,500 injuries 50. From the ground level there are no holes under the sills repair or... Access shall conform to ladders, Article 25. learnings offline and on the lower.!
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