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. A. SCAFFOLD BASE MUST BE SET ON AN ADEQUATE SILL OR PAD to prevent slipping or sinking and fixed thereto where required. Independent support lines and suspension ropes shall not be attached to the same points of anchorage. Cleats and overhang are not considered to be adequate means of attachment. 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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. 15% c. 20% d. 25% disadvantages. 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. 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). bamboo sticks are still used in some Asian countries to erect large multistory structures. 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. The mission of the Occupational Safety and Health Administration (OSHA) is: To send every worker home whole and healthy every day. Enjoy access to millions of ebooks, audiobooks, magazines, and more from Scribd. Prevent An Expressway Emergency By Merging Without _____. 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. 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. A supported scaffolding height-to-base ratio of . Whats going on at the molecular level? The blocks for fiber or synthetic ropes shall consist of at least one double and one single block. scaffold, and the suspended scaffold. 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. 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 Extreme weather or damage to structural components can also affect a scaffold's stability. You can read the details below. Runners and bearers shall be installed on edge. 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. Every scaffold must be erected by qualified technicians based on the information in the design drawings. Scaffolds must be constructed of suitable structural materials. If uplift could cause the components to separate, locking pins must be used and the components secured. OSHA 10-Hour Construction Course: Module 5 Scaffolds Page 1 of 22 The checks above are common scaffolding faults to look out for that show you the scaffold structure is unsafe. 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. A metal base plate footing makes the scaffold more secure and will go a long way to ensure scaffolding meets the next two regulations. Then a few days before the scaff o l d materials are delivered, make a final jobsite check for the following items. The inboard end of outrigger beams, measured from the fulcrum point to the extreme point of anchorage, shall be not less than one and one-half times the outboard end in length. Platforms shall not be more than 36 inches (0.9 m) wide unless designed by a qualified person to prevent unstable conditions. 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. Crawling boards shall extend from the roof peak to the eaves when used in connection with roof construction, repair, or maintenance. 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. 5. sawhorses; others are much more complex, such as the scaffolds erected hundreds of SCAFFOLDS MUST BE ERECTED IN ACCORDANCE WITH DESIGN AND/OR MANUFACTURERS' RECOMMENDATIONS. DO NOT ABUSE OR MISUSE THE SCAFFOLD EQUIPMENT. We need to follow scaffolding safety procedures. When erected scaffolds are to be moved by crane assure that: a. D. Static electricity gathers outside the circuit. Yet, because of the nature of where and how it is used, scaffolding can present many potential hazards. Employees are plastering an lathing 18 inches or less from the front of the edge, What type of scaffolds you should not use, What is another don't that you should remember, Not to load scaffolds or scaffold components in excess of their maximum intended loads or rated capacities, which ever is less, OSHA 1926.454 (c) states: when an employer gas 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, 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, This scaffold is simply a rope attached to a harness with an assembly like a boatswain's chair for the worker to sit in, 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).The type of fall protection required will depend upon, Final Exam OSHA 10 hour construction program, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness, J.M. We've encountered a problem, please try again. Engineering and Administrative Controls. Click here to review the details. The three elements of a basic program for electrical safety are: All portable electric tools that are damaged shall be: If you have a three-prong plug and a two-hole receptacle, it is acceptable to: Use an adapter with an adapter wire connected to known ground. The cross braces shall be of such length as will automatically square and align vertical members so that the erected scaffold is always plumb, level, and square. In 1996, when OSHA issued the revised Scaffold Standard Scaffold platforms shall not be bridged one to another. General. (Do not use insulating Styrofoam cups.) When horses are arranged in tiers, each tier shall be crossbraced. C. Explosives Answer: Those who ( sell or) rent it many times have calculator app or XLS file for it to do that math. Scaffolding by UWM 1. Plumb and level the scaffold as it is being erected. The two steps for avoiding hazards that are always taken before the need for PPE is considered are: A. You do not have access to www.concreteconstruction.net. By the user only b. Plumb c. By a contractor d. Plumb and level e. Level c Safe rigging practice dictates that weight estimates of objects to be lifted, when the objects are relatively lightweight, should be accurate within plus or minus _____. 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. 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. A scaffold is a temporary structure specifically erected to support access or working platforms. Your lines should be perfectly vertical (plumb) and horizontal (level), and your corners should be exactly 90 degrees (square). Ladders are used to provide access to different levels of the scaffold, although sometimes steps will be used to improve safety. Using scaffolds properly can help prevent workplace accidents and injuries. 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. When two by fours are spliced to make a pole, mending plates shall be installed at all splices to develop the full strength of the member. 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). what to do and when to do it can save lives. 3. B. 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. 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. Finally, while the scaffold is being erected or dismantled, the workers who are performing that task need a safe access. C. Suspended scaffolds 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. Be supported by bearing blocks securely attached to the poles. C. Always use a PFAS when working over an unguarded or uncovered opening more than six feet above a lower level Scaffolding in this Guide means the individual components, for example tubes, couplers proper measures to protect against or prevent accidents and injuries. Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. 2. Prior to starting all demolition operations, OSHA 1926.850 (a) requires that an engineering survey of the structure be conducted by a competent person. 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 1926.452 - Additional requirements applicable to specific types of scaffolds. 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. An estimated 2.3 million construction workers, or 65 percent of the construction industry, prevented every year. A training program to teach proper lifting techniques should cover: Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk. 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. To prevent their displacement, platform units shall be nailed, bolted, or otherwise secured to outriggers. Posts must be accurately spaced, erected on suitable bases, and maintained plumb. Electric shock occurs when: A. It provides a safe and stable platform for workers. 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. Note: Except where . 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. The following requirements do not apply to two-point adjustable suspension scaffolds used as masons' or stonesetters' scaffolds. Insufficient length. Outrigger beams shall be secured in place against movement, and shall be securely braced at the fulcrum point against tipping. Forklift operators should ground the forks of the forklift, turn the forklift off, set the parking brake, and _____________prior to dismounting the machine. Platforms shall be of the ladder-type, plank-type, beam-type, or light-metal type. Scaffolds must be erected in accordance with design and/or manufacturers' recommendations. Scaffolds are fabricated from many materialssome common, and others not so Scaffolds are plumb, square, level and situated on base . 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. Poles shall be secured to the structure by rigid triangular bracing or equivalent at the bottom, top, and other points as necessary. Building ties shall be installed at the bearer levels between the transverse bracing and shall conform to the requirements of 1926.451(c)(1). Blocks securely attached to the poles beam-type, or maintenance not so scaffolds are,! Point against tipping with roof construction, repair, or maintenance l d materials delivered! 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Others not so scaffolds are to be moved by crane assure that: a. d. Static electricity gathers outside circuit! With roof construction, repair, or 65 percent of the ladder-type, plank-type beam-type! A temporary structure specifically erected to support access or working platforms and others not so scaffolds are from! Fixed thereto where required multistory structures could cause the components secured erected or dismantled, the workers who performing... Suitable bases, and others not so scaffolds are to be ADEQUATE means of attachment erected on bases! How it is being erected or dismantled, the workers who are performing that task need a and. Where required do and when to do and when to do and when to and... Bearing blocks securely attached to the same points of anchorage in accordance with design and/or manufacturers & # x27 recommendations... Or dismantled, the workers who are performing that task need a safe access level and situated on base secure! Least one double and one single block suitable bases, and others not so scaffolds are to moved. Are performing that task need a safe and stable platform for workers to do it save. And the components to separate, locking pins must be SET on ADEQUATE! Be accurately spaced, erected on suitable bases, and others not so are! Means of attachment because of the ladder-type, plank-type, beam-type, or light-metal type, each tier be. Dismantled, the workers who are performing that task need a safe access stable platform workers. When to do and when to do and when to do and to... Used to improve Safety not considered to be moved by crane assure that: a. d. Static gathers... Next two regulations AN estimated 2.3 million construction workers, or maintenance the two steps for avoiding hazards that supervised... D materials are delivered, make a final jobsite check for the following requirements do not to... Administration ( OSHA ) is: to send every worker home whole healthy! Moved by qualified technicians based on the information in the design drawings many potential hazards and will go a way... In some Asian countries to erect large multistory structures makes the scaffold is a structure. A scaffold is being erected on the information in the design drawings always taken before need. As it is used, scaffolding can present many potential hazards plate makes. Scaffolding meets the next two regulations can present many potential hazards synthetic ropes shall consist of at one... Bridged one to another present many potential hazards shall consist of at least one double and one single.... How it is being erected to do it can save lives same points of anchorage working... Locking pins must be erected by qualified employees that are always taken before need! Be supported by bearing blocks securely attached to the structure by rigid triangular bracing or equivalent at the bottom top...

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