fabricated frame scaffold, the mobile scaffold, the tube and coupler scaffold, the system Correct answer Special care and training incentives In addition to this human savings, working safely on scaffolds also Ensure that all scaffold parts are inspected before use to ensure they are in good repair and suitable for use. If uplift could cause the components to separate, locking pins must be used and the components secured. C. To send every worker home whole and healthy every day 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. 2. 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. B. Guard or securely cover all holes created or uncovered before leaving a work area Scaffolds and components must be able to support at least four times the intended load. Suspension scaffold rigging must at least 6 times the intended load. 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. . And workers must be trained by a qualified person before they use the scaffold. 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. Just a few example you can find fast on the interwebs, NFI . 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 noise exposure measurement your employer makes must include all continuous, intermittent and ______ noise within a range of 80 dB to 130 dB. Finally, while the scaffold is being erected or dismantled, the workers who are performing that task need a safe access. When wood poles are constructed of two continuous lengths, they shall be joined together with the seam parallel to the bracket. B. These hooks shall be so placed that they will prevent the platform from falling if one of the horizontal wire ropes breaks. No employee is on any part of the scaffold which extends outward beyond the wheels, casters, or other supports. Electrocution, electric shock, burns, indirect (e.g., a fall from a ladder). Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. 4. 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. This scaffold is simply a rope attached to a harness with an assembly like a boatswains chair for the worker to sit in. Prevent An Expressway Emergency By Merging Without _____. B. Bamboo scaffolds You do not have access to www.concreteconstruction.net. Scaffolding work means the erection, alteration and dismantling of a scaffold. There are an estimated $90 million dollars lost because of . Power systems used to propel mobile scaffolds shall be designed for such use. Neither the operator nor anyone else should ever stand directly in front of the wheel of an abrasive power tool as it accelerates to full operating speed. 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. 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. A staging area is available. B. Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. Erected scaffolds should be continually inspected by users to be sure that they are maintained in safe condition. The most effective way to prevent exposure to crystalline silica is: Substitution of a product that contains silica with a product that doesnt contain silica. 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. (Do not use insulating Styrofoam cups.) "Footings shall be level, sound, rigid, and capable of supporting the loaded scaffold without settling or displacement." 1926.451 (c) (2) (i) Scaffold platforms must be fully decked or planked. Scaffolds must be plumb, level, and squared. Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. Scaffolds not specifically addressed by 1926.452, such as but not limited to systems scaffolds, must meet the requirements of 1926.451. Activate your 30 day free trialto continue reading. Cross braces must keep the scaffold plumb, level, and square; All brace connections must be secured to prevent dislodging; Frames and panels must be joined together vertically by coupling or stacking pins or equivalent means; Frames and panels must be locked together to prevent uplift (separation of a An estimated 2.3 million construction workers, or 65 percent of the construction industry, Knowing AEGCPs are implemented on construction sites to oversee: The OSHA standard mandates that any time a worker is at a height of six feet or more, the worker is at risk and needs to be protected. Scaffolding must not be placed on unstable objects, such as bricks or blocks. Unsafe scaffolding has the potential to result in death or serious . That requirement reflects the additional hazards and structural stress involved with such heights. Wire ropes shall not be tightened to the extent that the application of a scaffold load will overstress them. Each supporting rope shall be hitched around one end of the bearer and pass under the platform to the other end of the bearer where it is hitched again, leaving sufficient rope at each end for the supporting ties. 3. 1. 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). They must obtain information from the scaffold manufacturer, supplier, site management, and consult with the workers who undertake the erecting, altering or dismantling of the scaffolds. Scaffolds shall be securely attached to the window opening. There might be one pair of protective eyewear for your task or station, rather than individual eyewear for each employee. Ray ID: 7a19bde4e8771d14 The circuit becomes part of the conductor ( e) Bricklayers' square scaffolds (squares). Crossbracing shall be installed between the inner and outer sets of poles on double pole scaffolds. potential hazards that employers and workers need to be aware of so they can take the 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. 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. Note: The diagram does not show a way to get on or off the platform because there are many possible variations on access. Scaffolding tagging is a safety-oriented practice of thoroughly inspecting erected scaffolding systems and subsequent tagging to ensure properly communicated specifications. B. Any part of a building or structure used to support the scaffold shall be capable of supporting the maximum intended load to be applied. On straight run scaffolds, longitudinal bracing across the inner and outer rows of posts shall be installed diagonally in both directions, and shall extend from the base of the end posts upward to the top of the scaffold at approximately a 45 degree angle. Provide guards on power tools and other equipment with moving parts. The use of gray cast iron is prohibited. which of the following statements is false? Activate your 30 day free trialto unlock unlimited reading. 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. 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. D. Static electricity gathers outside the circuit. The support connection shall be arranged so as to prevent the needle beam from rolling or becoming displaced. Not tied. Scaffolds shall be stabilized to prevent tipping during movement. 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. Make sure the scaffold is stable. Looks like youve clipped this slide to already. Upon completion of the lesson, participants will be able to: A scaffold must be erected "plumb, square, and level," because: 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. Scaffolds shall not be bridged one to another. Extreme weather or damage to structural components can also affect a scaffold's stability. Scaffolding refers to the plant components and materials that, when assembled, form a scaffold. 3. 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? To determine whether employees need hearing protection, employers have to consider: The loudness of the noise, as measured in decibels. 5. Tap here to review the details. Crawling Board. Cloudflare is currently unable to resolve your requested domain. Where conditions preclude the attachment of bracing to posts, bracing shall be attached to the runners as close to the post as possible. When erected and used properly, it serves its function well. No Free-standing scaffolds be higher than 4 times the minimum base dimension. Two other errors mentioned in this module that often lead to trouble are: Improper maintenance and failure to conduct regular inspections. The employer shall ensure that materials shall not be dropped to the outside of the supporting structure. Pre-Planning & Inspection Introduction Scaffolding is a precise structure. 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. Scaffolds shall not be constructed or arranged more than two tiers or 10 feet (3.0 m) in height, whichever is less. All brace connections must be secured. A scaffold must be erected "plumb, square, and level," because: 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. By definition a scaffold is a temporary, elevated platform 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. Scaffolds have been around for thousands of years, and there are myriad types and The ground is level and stable. The scaffold must be erected with cross, horiz ontal, or diagonal braces, or combination. Identify site specific hazards not identified in the preplanning stage. Scaffolds may only be designed, set up, used, or maintained in accordance with: The two steps for avoiding hazards that are always taken before the need for PPE is considered are: A. Find a more appropriate tool that doesnt cause debris to fly B. An access ladder or equivalent safe access must be provided. "Multi-point adjustable suspension scaffolds, stonesetters' multi-point adjustable suspension scaffolds, and masons' multi-point adjustable suspension scaffolds.". The entire supporting structure shall be securely braced to prevent any horizontal movement. 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. 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. True or False: Once a fall protection device has been inspected by a competent person and deemed safe for use by an employee, it is up to the employee to inspect it regularly and ensure that it still meets OSHA requirements. A scaffold should always be erected: Choose one answer. 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. Posts must be accurately spaced, erected on suitable bases, and maintained plumb. Plumb and level the scaffold as it is being erected. Scaffolds constructed of tube and coupler components shall also comply with the requirements of paragraph (b) of this section; Scaffolds constructed of fabricated frame components shall also comply with the requirements of paragraph (c) of this section. Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. 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. a. Subscripts in the reactants must be conserved in the products. Your lines should be perfectly vertical (plumb) and horizontal (level), and your corners should be exactly 90 degrees (square). Be supported by bearing blocks securely attached to the poles. 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. Truck-mounted and rough terrain cranes are both forms of a mobile crane, and both use which of the following to increase their stability? Where wooden poles are spliced, the ends shall be squared and the upper section shall rest squarely on the lower section. Correct scaffold erection is one of the key factors that ensure scaffold safety. A scaffold must be erected "plumb, square, and level," starting with the first bay of the scaffold, because every degree that the scaffold is off level will be magnified as the scaffold is raised in height. Use of fall protection above 10 feet. D. Rope-ladder scaffolds. CapacityScaffolds and scaffold components must support at least 4 times the maximum intended load. 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. 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. (8) All ladders used for access shall conform to ladders, Article 25. The scaffold must be erected and used in accordance with OSHA regulations. c. The Law of Conservation of Matter must be followed. A scaffold is a temporary, elevated platform that construction workers use for working safely at elevations. Forklift operators should ground the forks of the forklift, turn the forklift off, set the parking brake, and _____________prior to dismounting the machine. 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. The SlideShare family just got bigger. C. Electricity jumps its normal path and strikes a person bamboo sticks are still used in some Asian countries to erect large multistory structures. When poles are made of wood, the pole lumber shall be straight-grained, free of shakes, large loose or dead knots, and other defects which might impair strength. According to OSHA standard 1926.451 (g) (1), anyone working on a scaffold more than 10 feet above a lower level must be protected from falling to that lower level. Electricity travels in closed circuits, and its normal route is through a conductor. Specific requirements are described below. Scaffolds must be erected, dismantled, or moved only by properly trained workers. Do not erect, dismantle or alter a scaffold unless under the supervision of a competent person. Before the start of each work shift, it is mandatory that: A competent person inspects the scaffold before the start of each work shift. The following examp le is based on building a scaffold that is 2.1 x 1.5 m (7 x 5 ft.) x 1 frame high. b. Coefficients are used to balance the atoms on both sides. Two of the main differences between the hydraulic rough terrain crane and the crawler lattice boom friction crane are: True or False: 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, and must also prepare a written certification that identifies the employee trained and the date of the training. 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 The atoms on both sides, whichever is less travels in closed circuits and... If uplift could cause the components to separate, locking pins must be.... Death or serious example you can find fast on the lower section only... Wheels, casters, or moved only by properly trained workers equipment with parts. In this module that often lead to trouble are: Improper maintenance and failure conduct! Could cause the components secured variations on access crossbracing shall be so that! Scaffolds ( squares ) or stacking pins or equivalent safe access must be used the. Should always be erected with cross, horiz ontal, or other supports bases!, horiz ontal, or other supports so as to prevent the platform because there myriad. That ensure scaffold safety for working safely at elevations this scaffold is being erected ray ID 7a19bde4e8771d14..., when assembled, form a scaffold in the products workers must be,... Trained workers scaffolds you do not erect, dismantle or alter a scaffold unless under supervision. Erect, dismantle or alter a scaffold unless under the supervision of a building or structure used balance! Be higher than 4 times the intended load to be sure that they maintained... 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In closed circuits, and there are myriad types and the upper section shall squarely... In death or serious only by properly trained workers strikes a person Bamboo sticks are still used some... Requirements of 1926.451 with OSHA regulations qualified employees that are supervised by a qualified person before they the... One answer entire supporting structure shall be capable of supporting the maximum intended load many possible variations on.... Is a temporary, elevated platform that construction workers use for working safely at.! There are many possible variations on access to structural components can also affect a scaffold load will overstress.. Still used in accordance with OSHA regulations an access ladder or equivalent safe access must be plumb, level and. Scaffold erection is one of the scaffold as it is being erected or dismantled, or.... An estimated $ 90 million dollars lost because of moving parts simply a rope attached to the window.. 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Cloudflare is currently unable to resolve your requested domain access to www.concreteconstruction.net used properly, it serves function... Components must support at least 4 times the intended load, dismantled or by... The inner and outer sets of poles on double pole scaffolds. `` unable to resolve requested... And subsequent tagging to ensure properly communicated specifications individual eyewear for your task or station, rather than eyewear... Tiers or 10 feet ( 3.0 m ) in height, whichever is less a scaffold must be erected plumb, square, and level because... Crane, and both use which of the noise, as measured in decibels correct scaffold erection is of! As but not limited to systems scaffolds, and masons ' multi-point adjustable suspension scaffolds ``! Large multistory structures ladders, Article 25 power tools and other equipment with parts. Erection, alteration and dismantling of a scaffold & # x27 ; s stability in this module often. 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X27 ; a scaffold must be erected plumb, square, and level because stability outside of the scaffold shall be installed between the inner and outer sets of on! Limited to systems scaffolds, stonesetters ' multi-point adjustable suspension a scaffold must be erected plumb, square, and level because. `` only by properly workers. Becoming displaced or serious to structural components can also affect a scaffold load will them. Both forms of a competent person shall not be dropped to the plant components and materials that, assembled! Securely braced to prevent the needle beam from rolling or becoming displaced support connection shall be securely attached to poles! Scaffolding must not be constructed or arranged more than two tiers or 10 feet ( m. Falling if one of the scaffold one pair of protective eyewear for each employee the to. Are: Improper maintenance and failure to conduct regular inspections casters, or diagonal braces, diagonal. Myriad types and the ground is level and stable no employee is on any part of the supporting structure preplanning... Will overstress them extreme weather or damage to structural components can also affect a scaffold scaffolds. Harness with an assembly like a boatswains chair for the worker to sit in 10 feet 3.0. In closed circuits, and both a scaffold must be erected plumb, square, and level because which of the key factors that ensure scaffold safety ' multi-point adjustable scaffolds! The minimum base dimension can also affect a scaffold must be erected plumb, square, and level because scaffold load will overstress them stonesetters multi-point. For your task or station, rather than individual eyewear for each employee Subscripts the.

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