Every degree that the scaffold is off leveled will be magnified as the scaffold is raised in height. Scaffolds may only be designed, set up, used, or maintained in accordance with: 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). D. Stop using the tool, A. A scaffold is a temporary structure specifically erected to support access or working platforms. a) square b) straight c) without braces d) vibration free e) level B Prior to hoisting an object it is best to a) know the route required b) know or calculate the mass c) measure its length d) attach at least two . Review the foundation. Place the planks. Runners shall extend over a minimum of two poles, and shall be supported by bearing blocks securely attached to the poles. Scaffolding work means the erection, alteration and dismantling of a scaffold. When erected scaffolds are to be moved by crane assure that: a. Screw jacks must be used to level scaffolding on uneven surfaces with a maximum extension for a screw jack of 12 inches. Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. Scaffolds and components must be able to support at least four times the intended load. 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. Crossbracing shall be installed between the inner and outer sets of poles on double pole scaffolds. Make sure the scaffold is stable. 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. 5. 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. 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. If this is the approach at your job site, then: You must clean and disinfect the eyewear between each use. Catenary Scoffold. Smith, Michael Abbott, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. 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 . A training program to teach proper lifting techniques should cover: Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk. Scaffolds, once properly erected, are a control measure to prevent the risk of persons and objects falling when working at height. of first grade manila rope. Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. 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. OSHA MODULE 5 Scaffolds Scaffolds shall be suspended from metal outriggers, brackets, wire rope slings, hooks, or means that meet equivalent criteria (e.g., strength, durability). For example, if lumber is used, it must be construction grade or Number 1 Grade spruce. 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. Workers need to take which of the following common-sense steps to protect themselves from falls through skylights and roof and floor openings? By whitelisting SlideShare on your ad-blocker, you are supporting our community of content creators. They come in a variety of styles and are made from many different materials. 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. Hardware should be included to fasten the planks into place. D. Alertness and reaction time testing. A good time to perform these inspections is at the start of the workday to ensure the area is clear for that day's shift. Employers must: Ensure that the safety monitor is a competent person knowledgeable about fall protection. Outrigger beams shall be secured in place against movement, and shall be securely braced at the fulcrum point against tipping. "Fabricated frame scaffolds" (tubular welded frame scaffolds). aluminum, or less commonly, wood. Stilts shall be properly maintained. Activate your 30 day free trialto unlock unlimited reading. 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). Provide guards on power tools and other equipment with moving parts. 7. job, and he shouldhis life depends on it. In addition to the applicable requirements of 1926.451, the following requirements apply to the specific types of scaffolds indicated. 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. 10. True or False: There is usually some form of warning before a cave-in. Upon completion of the lesson, participants will be able to: Stilts, when used, shall be used in accordance with the following requirements: [44 FR 8577, Feb. 9, 1979; 44 FR 20940. 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). Scaffolding is not to be erected, moved, dismantled or altered unless supervised by a . 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. 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. There are a number of requirements that employers must do to protect their workers from caught-in or between hazards. Posts must be accurately spaced, erected on suitable bases, and maintained plumb. 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 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). (b) Tube and Coupler Scaffolds. 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. 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. . All explosives must be accounted for at all times, and all not being used must be kept in a: OSHAs Hazard Communication Standard (HazCom) is designed to ensure that information about __________and associated protective measures is disseminated. Which of these is required if the workers body, hands or clothing may come into contact with moving parts? The frames must be plumb and level and spaced to adequately support the loads. Hot wires, ungrounded wires that can cause a shock if you touch them, are usually: More than 50 percent of electrocutions are caused by a worker coming in direct contact with: The OSHA standard requires flexible cords to be rated for: What is the most frequent violation of OSHA electrical standards? Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. The circuit becomes part of the conductor Ladder Jack Scaffold. Scaffolding means a convenient platform for persons to work at height. Cyber Awareness Challenge 2022 Answers And Notes. D. Static electricity gathers outside the circuit. Platforms shall not be more than 36 inches (0.9 m) wide unless designed by a qualified person to prevent unstable conditions. 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. All brace connections must be secured. 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. C. Have all brakes and locking devices set when the occupied personnel platform is in stationary position The SlideShare family just got bigger. Warped. 9. The ladder must extend 1 m (3 ft.) above the landing. Let us know about it through the REPORT button at the bottom of the page. Scaffolding must not be placed on unstable objects, such as bricks or blocks. All vertical joints of the scaffold are attached and secured by bolts and nuts or other fastening devices of adequate strength; b. D. Friendly weightlifting competitions among workers to build strength. When the pump jack has to pass bracing already installed, an additional brace shall be installed approximately 4 feet (1.2 m) above the brace to be passed, and shall be left in place until the pump jack has been moved and the original brace reinstalled. 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. Add lukewarm water to two plastic cups. Select the equipment you need and place it near the work area. The site owner may have set restrictions that prevent you from accessing the site. The support connection shall be arranged so as to prevent the needle beam from rolling or becoming displaced. D. All of the above. Scaffolds must be braced by cross, horizontal, or diagonal braces, or a combination thereof. The two steps for avoiding hazards that are always taken before the need for PPE is considered are: A. Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor Correct scaffold erection is one of the key factors that ensure scaffold safety. and must be provided on any scaffold 10 feet or more above a lower level. Any part of a building or structure used to support the scaffold shall be capable of supporting the maximum intended load to be applied. Or altered unless supervised by a competent person and spaced to adequately support the is! Should be included to fasten the planks into place you are supporting our community of content creators if is! Through skylights and roof and floor openings, then: you must clean and disinfect the between... Then: you must clean and disinfect the eyewear between each use fasten... 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