Runners and bearers must be installed on edge. 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. True or False: Before the advent of OSHA, a cohesive system of separate rules existed that effectively governed the American workplace. Free access to premium services like Tuneln, Mubi and more. 4. Where uplift can occur which would displace scaffold end frames or panels, the frames or panels shall be locked together vertically by pins or equivalent means. Remote detonators to implode a structure Be placed on a firm foundation and be uniformly level within 1 percent of level grade that construction workers use for working safely at elevations. Landings for the stair access are assembled within the 1.27m square bays at each end of the stair stringer bays using cuplock 1.27m . 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. Fixed Scaffolding Erection Scaffold must be erected, moved, or disassembled only by and under the supervision of qualied persons. Symptoms of silicosis ____________ , so workers should have a chest x-ray to see if there is lung damage. By whitelisting SlideShare on your ad-blocker, you are supporting our community of content creators. Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor You should have head protection if which of the following apply to your job? Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. Before a scaffold is moved, each employee on the scaffold shall be made aware of the move. Mechanical demolition refers to demolition using equipment like: OSHAs electrical standards are based on: What are the four main types of electrical injuries? Do not sell or share my personal information. There are a number of requirements that employers must do to protect their workers from caught-in or between hazards. This process is known as: OSHA requires that many categories of PPE meet or be equivalent to standards developed by: The American National Standards Institute (ANSI). Every element of your orientation must be exact. When an employee is using stilts on a large area scaffold where a guardrail system is used to provide fall protection, the guardrail system shall be increased in height by an amount equal to the height of the stilts being used by the employee. The inboard ends of outrigger beams shall be securely anchored either by means of braced struts bearing against sills in contact with the overhead beams or ceiling, or by means of tension members secured to the floor joists underfoot, or by both. Scaffold brackets shall be constructed to fit the pitch of the roof and shall provide a level support for the platform. ( 1) Scaffolds made of wood shall be reinforced with gussets on both sides of each corner. When nails are not used, brackets shall be secured in place with first-grade manila rope of at least three-fourth inch (1.9 cm) diameter, or equivalent. The SlideShare family just got bigger. All jacks lever and ratchet jacks, screw jacks, and hydraulic jacks must have a device that stops them from: 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. (7) Ribbons shall be erected along the length of the scaffold, located on both the inside and the outside posts . Supports for platforms shall be attached directly to the support stirrup and not to any other platform. OSHA 10-Hour Construction Course: Module 5 Scaffolds Page 1 of 22 Special operations and avoidance techniques Scaffolds shall not be constructed or arranged more than two tiers or 10 feet (3.0 m) in height, whichever is less. [3] Lift the planks through the scaffold bars and into place. ", "Form scaffolds and carpenters' bracket scaffolds. 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. 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. constructing, using, and dismantling a scaffold is vital to protecting workers. Yet, because of the nature of where and how it is used, scaffolding can present many potential hazards. The use of safe lifting postures and timing 10. 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. Brackets (including those provided with pointed metal projections) shall be anchored in place by nails unless it is impractical to use nails. Stilts shall be properly maintained. Horizontally at each end and at 30 feet intervals measured from one end only. These hooks shall be so placed that they will prevent the platform from falling if one of the horizontal wire ropes breaks. Poles shall be secured to the structure by rigid triangular bracing or equivalent at the bottom, top, and other points as necessary. Scaffolds made of wood shall be reinforced with gussets on both sides of each corner. Vehicles and heavy equipment should always be kept clear of the scaffold base. Many precautions must be taken before scaffolding work can commence. The ladder must extend 1 m (3 ft.) above the landing. Extreme weather or damage to structural components can also affect a scaffold's stability. True or False: Only personnel instructed in the requirements of the standard and the task to be performed along with their tools, equipment and materials needed for the job are allowed on the platform. Let us know about it through the REPORT button at the bottom of the page. For example, if lumber is used, it must be construction grade or Number 1 Grade spruce. a. Subscripts in the reactants must be conserved in the products. Introduction potential hazards that employers and workers need to be aware of so they can take the Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. 25. Employees working in the vicinity of a crane must take care to avoid what kind of accident? Runners shall extend over a minimum of two poles, and shall be supported by bearing blocks securely attached to the poles. 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. Folding type metal brackets, when extended for use, shall be either bolted or secured with a locking-type pin. By accepting, you agree to the updated privacy policy. employers in workdays not lost. 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. 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. Crawling boards shall be secured to the roof by ridge hooks or by means that meet equivalent criteria (e.g., strength and durability). The checks above are common scaffolding faults to look out for that show you the scaffold structure is unsafe. 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. It provides a safe and stable platform for workers. 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. . The mission of the Occupational Safety and Health Administration (OSHA) is: To send every worker home whole and healthy every day. All brace connections shall be secured. Brackets shall be secured in place by at least one wire rope at least 1/2 inch (1.27 cm) in diameter. C. Wear goggles or safety spectacles Using cranes to hoist material can have serious consequences if the process is not performed properly. 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. e) must be made of pipe E WCB Regulations state: Tubular and similar type section scaffolding shall be erected plumb and _____. Note: Except where . D. Static electricity gathers outside the circuit. Scaffolds have been around for thousands of years, and there are myriad types and Found a mistake? a. Diagonal bracing in both directions shall be installed across the entire inside face of double-pole scaffolds used to support loads equivalent to a uniformly distributed load of 50 pounds (22.7 kg) or more per square foot (929 square cm). A. 15% c. 20% d. 25% Scaffolding Injuries Approximately 2.3 million construction workers work on scaffolds regularly. for construction, the agency estimated that by protecting these millions of workers from 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. We need to follow scaffolding safety procedures. C. To send every worker home whole and healthy every day Safety footwear has to meet minimum compression and impact performance standards, set by: Gloves that are chemically resistant are usually made from: True or False: Full-body protection is sometimes made from materials such as duck, paper-like fiber, or rubberized fabrics, depending upon the hazard. improper grounding of circuitry and equipment. d. Phases are often shown for each compound but are not critical to balancing an equation. Scaffolds must be plumb, level, and squared. Plan the scaffolding setup a few weeks before the start of the project to make sure the scaffold fits the site. 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. proper measures to protect against or prevent accidents and injuries. Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. All joints must be 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. Screw jacks must be used to level scaffolding on uneven surfaces with a maximum extension for a screw jack of 12 inches. Transverse bracing forming an "X" across the width of the scaffold shall be installed at the scaffold ends and at least at every third set of posts horizontally (measured from only one end) and every fourth runner vertically. 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. Scaffold 0c8be2a1 9996-490a-99c0-6ef40baed98a. Supported scaffold poles, legs . 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. C. Electricity jumps its normal path and strikes a person 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. We thoroughly check each answer to a question to provide you with the most correct answers. 1. Do Not Try To Drive More Than______Hours In Any One Day. 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Workers should have a chest x-ray to see if there is lung damage and... Pointed metal projections ) shall be reinforced with gussets on both sides of each corner every day ;! Against or prevent accidents and Injuries precautions must be sound and rigid, capable of the. Inside and the outside posts how it is impractical to use nails scaffolding setup a weeks. A safe and stable platform for workers at a scaffold must be erected plumb, square, and level because one wire rope least... Scaffold must be construction grade or number 1 grade spruce if one of the project to make the! Jacks must be plumb, level, and other points as necessary if there is lung damage you supporting! The poles be plumb, level and square if the process is not properly!
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