B. DO NOT ERECT, DISMANTLE OR ALTER A SCAFFOLD unless under the supervision of a qualified person. Do not abuse or misuse the scaffold equipment. 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. Platforms shall not extend outward beyond the base supports of the scaffold unless outrigger frames or equivalent devices are used to ensure stability. Scaffold platforms shall not be bridged one to another. Correct answer Special care and training incentives 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. potential hazards that employers and workers need to be aware of so they can take the Couplers shall be of a structural metal, such as drop-forged steel, malleable iron, or structural grade aluminum. Your lines should be perfectly vertical (plumb) and horizontal (level), and your corners should be exactly 90 degrees (square). 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). Platforms shall be secured to the brackets in a manner that will prevent the separation of the platforms from the brackets and the movement of the platforms or the brackets on a completed scaffold. The two steps for avoiding hazards that are always taken before the need for PPE is considered are: A. 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. This poses a risk of electrocution not just to the worker holding the tool, but to everyone who contacts the scaffold. There might be one pair of protective eyewear for your task or station, rather than individual eyewear for each employee. What Is The Molar Mass Of Calcium Chloride? B. Bamboo scaffolds Electrocution, electric shock, burns, indirect (e.g., a fall from a ladder). 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. Why? 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. True or False: Before the advent of OSHA, a cohesive system of separate rules existed that effectively governed the American workplace. 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. And workers must be trained by a qualified person before they use the scaffold. 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. 5% b. How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . Insufficient length. D. Alertness and reaction time testing. 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. Scaffold planks should extend over their end supports not less than 6 inches nor more than 18 inches. 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. There are a number of requirements that employers must do to protect their workers from caught-in or between hazards. 3. Then a few days before the scaff o l d materials are delivered, make a final jobsite check for the following items. In addition to this human savings, working safely on scaffolds also The maximum permissible span for 2 X 10 inch or wider planks is shown below in "Material." . Bearers shall extend a minimum of 3 inches (7.6 cm) over the outside edges of runners. sawhorses; others are much more complex, such as the scaffolds erected hundreds of a. Subscripts in the reactants must be conserved in the products. Runners shall be installed along the length of the scaffold, located on both the inside and outside posts at level heights (when tube and coupler guardrails and midrails are used on outside posts, they may be used in lieu of outside runners). To prevent their displacement, platform units shall be nailed, bolted, or otherwise secured to outriggers. Move the scaffold into your desired position, and make sure it is level and secure. 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. Caster stems and wheel stems shall be pinned or otherwise secured in scaffold legs or adjustment screws. ", "Form scaffolds and carpenters' bracket scaffolds. C. Have all brakes and locking devices set when the occupied personnel platform is in stationary position 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 In addition to the applicable requirements of 1926.451, the following requirements apply to the specific types of scaffolds indicated. bamboo sticks are still used in some Asian countries to erect large multistory structures. Scaffold 0c8be2a1 9996-490a-99c0-6ef40baed98a. ", "Step, platform, and trestle ladder scaffolds. In the United States and Canada, most scaffolds found at jobsites are made of steel, Your IP: 143.244.138.144, Requested URL: www.concreteconstruction.net/_view-object?id=00000154-24cb-db06-a1fe-77cb16a60000, User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36. Tap here to review the details. When erected and used properly, it serves its function well. "Plasterers', decorators', and large area scaffolds." Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. Prevent An Expressway Emergency By Merging Without _____. Scaffolds shall be braced by cross, horizontal, or diagonal braces, or combination thereof, to prevent racking or collapse of the scaffold and to secure vertical members together laterally so as to automatically square and align the vertical members. Erected scaffolds should be continually inspected by users to be sure that they are maintained in safe condition. Which of the following is an element of a hearing conservation program? ERECTED SCAFFOLDS SHOULD BE CONTINUALLY INSPECTED by users to be sure that they are maintained in safe condition. that construction workers use for working safely at elevations. When only two ropes are used with each float: They shall be arranged so as to provide four ends which are securely fastened to overhead supports. 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 Building ties shall be installed at the bearer levels between the transverse bracing and shall conform to the requirements of 1926.451(c)(1). Scaffolds are commonly used in construction work so that workers have a safe, stable platform on which to work when work cannot be done at ground level or on a finished floor. A scaffold is a temporary structure specifically erected to support access or working platforms. Because of this, the following is required: A certified crane operator must be used. Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. . 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 . 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. Splice plates of other materials of equivalent strength may be used. C. To send every worker home whole and healthy every day 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 Supported scaffold poles, legs . 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. Instant access to millions of ebooks, audiobooks, magazines, podcasts and more. Catenary Scoffold. C. Explosives "Two-point adjustable suspension scaffolds (swing stages)." Ray ID: 7a19bde4e8771d14 which of the following statements is false? 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. Pump jack brackets, braces, and accessories shall be fabricated from metal plates and angles. Outrigger beams shall be secured in place against movement, and shall be securely braced at the fulcrum point against tipping. Yet, because of the nature of where and how it is used, scaffolding can present many potential hazards. Ladders are used to provide access to different levels of the scaffold, although sometimes steps will be used to improve safety. Additional requirements applicable to specific types of scaffolds. Scaffolds shall be used only for the purpose of working at the window opening through which the jack is placed. The scaffold is usually constructed from aluminium or steel tubes and clips, with timber or metal scaffold planks used to form a secure and level working platform. Apr. 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. 1. 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. The scaffold is positioned so that swinging cannot bring the scaffold into contact with another surface. 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). Let us know about it through the REPORT button at the bottom of the page. A training program to teach proper lifting techniques should cover: A. Cloudflare is currently unable to resolve your requested domain. and that cross braces are of such length as will automatically keep the scaffold plumb, level, and square. 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. The mission of the Occupational Safety and Health Administration (OSHA) is: To send every worker home whole and healthy every day. B. Scaffolds, once properly erected, are a control measure to prevent the risk of persons and objects falling when working at height. Electricity travels in closed circuits, and its normal route is through a conductor. D. Friendly weightlifting competitions among workers to build strength. Most of these incident happen because of improper erection of the scaffold, inappropriate use by workers and the lack of inspection and maintenance of the scaffold after it has been erected. C. Both A and B least three examples of incorporating each of the elements. 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. Guardrails should be between 38" and 45" high. 9. Protect themselves by wearing the proper PPE Be supported by bearing blocks securely attached to the poles. Independent support lines and suspension ropes shall not be attached to the same points of anchorage. Any alteration of the original equipment shall be approved by the manufacturer. 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. 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