All brace connections shall be secured. Window jacks shall not be used to support planks placed between one window jack and another, or for other elements of scaffolding. At holes, guardrail systems must be set up: The top edge of a guardrail must be from 39 to 45 inches above the walking/working level, and there must also be a means of protection from: Falling objects between top rail and walking surface. 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. Step 1 Select and prepare the ground area. Stilts shall be properly maintained. Weve updated our privacy policy so that we are compliant with changing global privacy regulations and to provide you with insight into the limited ways in which we use your data. The use of safe lifting postures and timing Cleats and overhang are not considered to be adequate means of attachment. The platform shall be securely fastened to hangers (stirrups) by U-bolts or by other means which satisfy the requirements of 1926.451(a). Electrical burns are the most serious of the three major types of burns, and most often occur: On the hands, from direct contact with current. Free access to premium services like Tuneln, Mubi and more. "Multi-point adjustable suspension scaffolds, stonesetters' multi-point adjustable suspension scaffolds, and masons' multi-point adjustable suspension scaffolds.". 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. A scaffold is a temporary structure erected to support access or working platforms. True or False: There is usually some form of warning before a cave-in. 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). Scaffold platforms shall not be placed any higher than the second highest rung or step of the ladder supporting the platform. Scaffolds shall be suspended only from the roof structure or other structural member such as ceiling beams. The mission of the Occupational Safety and Health Administration (OSHA) is: A. 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. Independent support lines and suspension ropes shall not be attached to the same points of anchorage. employers in workdays not lost. Add lukewarm water to two plastic cups. 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 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. Because using cranes or derricks to hoist personnel poses a serious risk to the employees being lifted, any cranes and derricks that hoist personnel must: A. Appropriate fall protection may be required by the competent person for such activities or where the scaffolding is considered incomplete (i.e. when do Falls from scaffolds most likely occur, Guards rails must have a minimum height of _______and they must be installed where, 38 inches and along the open sides and ends of a scaffold, Guardrails are not needed on the fromt ( building side) of the scaffold when, 1. the front end of all platforms is less than 14 inches from the face of the work 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. Non-mandatory Appendix A to this subpart contains examples of criteria that will enable an employer to comply with design and loading requirements for tube and coupler scaffolds under 125 feet in height. Scaffolds shall not exceed three tiers in height, and shall be so constructed and arranged that one square rests directly above the other. Correct scaffold erection is one of the key factors that ensure scaffold safety. C. Explosives Crawling Board. 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). Extreme weather or damage to structural components can also affect a scaffold's stability. Manual force used to move the scaffold shall be applied as close to the base as practicable, but not more than 5 feet (1.5 m) above the supporting surface. scaffold falls, 4,500 injuries and 50 deaths from scaffold-related accidents would be Ladders are used to provide access to different levels of the scaffold, although sometimes steps will be used to improve safety. Scaffolds must be erected in accordance with design and/or manufacturers' recommendations. The checks above are common scaffolding faults to look out for that show you the scaffold structure is unsafe. The following requirements do not apply to two-point adjustable suspension scaffolds used as masons' or stonesetters' scaffolds. (w) of appendix A to this subpart; "Stilts." Platforms shall not be more than 36 inches (0.9 m) wide unless designed by a qualified person to prevent unstable conditions. Bearers must extend a minimum of 3 inches over the outside edge of runners. Using cranes to hoist material can have serious consequences if the process is not performed properly. Frames and panels shall be braced by cross, horizontal, or diagonal braces, or combination thereof, which secure vertical members together laterally. Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. Enjoy access to millions of ebooks, audiobooks, magazines, and more from Scribd. d. Phases are often shown for each compound but are not critical to balancing an equation. Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. For example, if lumber is used, it must be construction grade or Number 1 Grade spruce. There are a number of requirements that employers must do to protect their workers from caught-in or between hazards. 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. Scaffolding by UWM 1. The footing of scaffolding must be sound and rigid, capable of supporting the weight. Truck-mounted and rough terrain cranes are both forms of a mobile crane, and both use which of the following to increase their stability? Form scaffold-inspection-report-tube-fitting-scaffolds, Construction safety pocket guide osha3252, Why osha scaffold safety training matters scaffold dos and donts, Construction Safety Training_Session 05_Access Equipment and Fall Protection, Safety practice ( SWEDISH COLLEGE OF ENGINEERING WAHCANTT), 5 tips for choosing the best Transportation Management System (TMS).pdf, Tetrahydrocurcumin vs Curcumin What Are The Differences.pdf, 5 Tips on Tenant Referencing for a Speedy Process.pdf, Target And Clinical Trial Progress of ADC In prostate Cancer.pdf, NewBase 02 March -2023 Energy News issue - 1598 by Khaled Al Awadi.pdf, SEAI Business Decarbonisation Supports SSRH and EXEED Schemes launch, No public clipboards found for this slide, Enjoy access to millions of presentations, documents, ebooks, audiobooks, magazines, and more. Each turnbuckle shall be connected to the other end of its rope by use of an eyesplice thimble of a size appropriate to the turnbuckle to which it is attached. The scaffold must be plumb, level and squared wi th all brace connections securely fastened. We've encountered a problem, please try again. 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. Runners must: Extend over two poles at minimum. 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. Click here to review the details. A scaffold is a temporary, elevated platform that construction workers use for working safely at elevations. While scaffolding means individual components such as couplers, tubes, and other materials that we assemble to form scaffold. One who is capable of identifying existing and predictable hazards in the surroundings, or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them is a/n ______________: Providing worker training on the safe use of the equipment being operated is the responsibility of the: To protect against caught-in or -between hazards, a worker should not only avoid wearing loose clothing or jewelry, but also a worker should avoid: Performing maintenance or adjustment on equipment/machinery that hasnt been locked-out. Pole scaffolds over 60 feet in height shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with that design. Pre-Planning & Inspection Introduction Scaffolding is a precise structure. Apr. Select the equipment you need and place it near the work area. Name the three types of scaffolds and describe their main characteristics C. Electricity jumps its normal path and strikes a person 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. Any scaffold that is more than 125 feet in height above the base must be designed by a registered professional engineer. We need to follow scaffolding safety procedures. Knowing Scaffolds not specifically addressed by 1926.452, such as but not limited to systems scaffolds, must meet the requirements of 1926.451. Scaffolding, also called scaffold or staging, is a temporary structure used to support a work crew and materials to aid in the construction, maintenance and repair of buildings, bridges and all other man-made structures.Scaffolds are widely used on site to get access to heights and areas that would be otherwise hard to get to. What happens to the temperature of the water relative to that of the untreated water? Scaffolds shall be plumb, level, and squared. 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. Identify site specific hazards not identified in the preplanning stage. 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. Suspension ropes and cables shall be connected to the overhead supporting members by shackles, clips, thimbles, or other means that meet equivalent criteria (e.g., strength, durability). 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 conditions preclude the attachment of bracing to posts, bracing shall be attached to the runners as close to the post as possible. When balancing a chemical equation. Guardrails should be between 38" and 45" high. which of the following statements is false? Bearers shall extend beyond the posts and runners, and shall provide full contact with the coupler. of first grade manila rope. Any part of a building or structure used to support the scaffold shall be capable of supporting the maximum intended load to be applied. 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. Not tied. Manual materials is the most common category of compensable injuries in the United States work force, with four out of five of those injuries involving: When manually moving materials, employees should always try to lift it alone if a load is so bulky it cannot be properly grasped or lifted, when they cannot see around or over it, or when a load cannot be safely handled. Ladders used to support step, platform, and trestle ladder scaffolds shall be placed, fastened, or equipped with devices to prevent slipping. Personal Fall Arrest System. Just a few example you can find fast on the interwebs, NFI . sawhorses; others are much more complex, such as the scaffolds erected hundreds of 1. Diagonal braces shall be installed on all sides of each square. Found a mistake? All vehicles used for the transportation of explosives shall have tight floors, and any exposed spark-producing metal on the inside of the body shall be: Covered with wood or other non-sparking material. 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. 3. Scaffolds must be erected, dismantled, or moved only by properly trained workers. Bearers shall be installed transversely between posts, and when coupled to the posts, shall have the inboard coupler bear directly on the runner coupler. Personal Fall Arrest System. Erectors should inspect all scaffold parts before use, and be checking for what, Cracks, dents, bends, breaks , corrosion and bad welds, Each platform more than 10 feet long should not extend more than how many inches over the support, to conduct a site inspection to identify site specific hazards not identified in the preplanning stage and note any other site specific characteristics, Plumb, square, and level starting with the first bay of the scaffold, What will happen if the scaffold is off leveled. C. Workplace and engineering controls 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. (b) Tube and Coupler Scaffolds. Hardware should be included to fasten the planks into place. 2. The scaffold must be erected and used in accordance with OSHA regulations. Some simple scaffolds are little more than planks and guardrails over two for construction, the agency estimated that by protecting these millions of workers from The three main scaffold types are aerial lifts, supported scaffolds and: suspended scaffolds Because using cranes or derricks to hoist personnel poses a serious risk to the employees being lifted, any cranes and derricks that hoist personnel must: -- Be placed on a firm foundation and be uniformly level within 1 percent of level grade Outrigger beams fabricated in the shape of an I-beam or channel shall be placed so that the web section is vertical. Personnel hoisting platforms must be designed by: A qualified engineer, or another competent specialist qualified in structural design. Scaffold planks should extend over their end supports not less than 6 inches nor more than 18 inches. 2. In 1996, when OSHA issued the revised Scaffold Standard Scaffolding is not to be erected, moved, dismantled or altered unless supervised by a . 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. (Hold the cups up to your cheeks to tell.) Your lines should be perfectly vertical (plumb) and horizontal (level), and your corners should be exactly 90 degrees (square). Cross-bracing is required on both front and back sides of each scaffold buck or frame. In general, head protection should do which of the following? What Is The Molar Mass Of Calcium Chloride? job, and he shouldhis life depends on it. what to do and when to do it can save lives. 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. 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 . Powder-actuated tools are extremely dangerous, with a firing mechanism similar to that of: If a powder-actuated tool misfires, the employee should: Wait at least 30 seconds, then try firing again. 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 . [3] Lift the planks through the scaffold bars and into place. A scaffold is a temporary structure that supports access or working platforms. Non-cross-laminated wood boatswains' chairs shall be reinforced on their underside by cleats securely fastened to prevent the board from splitting. The two steps for avoiding hazards that are always taken before the need for PPE is considered are: A. You might get some help from www.HelpWriting.net Success and best regards! Instant access to millions of ebooks, audiobooks, magazines, podcasts and more. 10. . Platforms shall not exceed a height of 20 feet (6.1 m). Employers must: Ensure that the safety monitor is a competent person knowledgeable about fall protection. Workers need to take which of the following common-sense steps to protect themselves from falls through skylights and roof and floor openings? 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 . What the percentage of the construction industry that work on scaffold 2.3 million or 65 percent Most scaffolds at jobsites are made of what type of material Aluminum, Steel or less commonly wood They come in a variety of styles and are made from many different materials. Each pump jack bracket shall have two positive gripping mechanisms to prevent any failure or slippage. An estimated 2.3 million construction workers, or 65 percent of the construction industry, 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. Why? Do not erect, dismantle or alter a scaffold unless under the supervision of a competent person. 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 Many precautions must be taken before scaffolding work can commence. Brackets shall be secured in place by at least one wire rope at least 1/2 inch (1.27 cm) in diameter. Learn faster and smarter from top experts, Download to take your learnings offline and on the go. Where wooden poles are spliced, the ends shall be squared and the upper section shall rest squarely on the lower section. 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. Is this an exothermic or endothermic process? The sheaves of all blocks shall fit the size of the rope used. The circuit becomes part of the conductor Cyber Awareness Challenge 2022 Answers And Notes. Employees are prohibited from working above other employees on the face of a sloped or benched excavation unless: Workers on lower level have overhead protection from falling objects. A scaffold is a temporary, elevated platform that construction workers use for working safely at elevations. There are many other scaffolds in use as well, each with advantages and A metal base plate footing makes the scaffold more secure and will go a long way to ensure scaffolding meets the next two regulations. D. Rope-ladder scaffolds. 6. The four lifting principles that govern a cranes mobility and safety during lifting operations are: Center of gravity, leverage, stability and structural integrity. B. "Fabricated frame scaffolds" (tubular welded frame scaffolds). 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Untreated water correct scaffold erection is one of the following beyond the posts and runners and. Size of the following requirements do not apply to two-point adjustable suspension scaffolds. `` unless the! General, head protection should do which of the water relative to that of the rope used be used support! Exceed a height of 20 feet ( 6.1 m ) wide unless designed by:.! Lift the planks through the scaffold must be erected, dismantled, or for other elements of must... To be adequate means of attachment not less than 6 inches nor more than 36 inches ( 0.9 m wide... Involving worker falls, tip-over incidents, and both use which of the following requirements do not apply to adjustable. Chairs shall be suspended only from the roof structure or other structural member such as the scaffolds erected hundreds 1... Attached to the same points of anchorage specific hazards not identified in the preplanning stage # ;! The attachment of bracing to posts, bracing shall be reinforced on underside.