Light metal-type platforms having a rated capacity of 750 pounds or less and platforms 40 feet (12.2 m) or less in length shall be tested and listed by a nationally recognized testing laboratory. Use of fall protection above 10 feet. 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. It provides a safe and stable platform for workers. 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 _____. 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. Scaffolds must be constructed of suitable structural materials. Additional requirements applicable to specific types of scaffolds. 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. When erected and used properly, it serves its function well. Runners and bearers shall be installed on edge. If the use of a power tool can result in flying sparks, metal shavings, wood chips, splashes, or other debris, workers should: A. Folding type metal brackets, when extended for use, shall be either bolted or secured with a locking-type pin. 6. Be used only to support personnel, unless the scaffold has been designed for other loads by a qualified engineer and built to withstand the tipping forces caused by those other loads being placed on the bracket-supported section of the scaffold. Bearers shall be installed transversely between posts, and when coupled to the posts, shall have the inboard coupler bear directly on the runner coupler. Diagonal bracing in both directions shall be installed across the entire outside face of all double- and single-pole scaffolds. . Cyber Awareness Challenge 2022 Answers And Notes. Scaffolds must be erected in accordance with design and/or manufacturers' recommendations. Truck-mounted and rough terrain cranes are both forms of a mobile crane, and both use which of the following to increase their stability? The three main scaffold types are aerial lifts, supported scaffolds and: A. Tubular scaffolds Chicken Ladder. Note: Except where . When horses are arranged in tiers, each tier shall be crossbraced. 3. Scaffold components. Frequently used types of scaffolds include the A ground-fault circuit interrupter (GFCI) protects workers from shock by: Matching the amount of current going into an electrical device against the amount returning from the device and shutting down power if a ground fault is detected. 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: 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. When horses are arranged in tiers, the legs of each horse shall be nailed down or otherwise secured to prevent displacement. Scaffolds not specifically addressed by 1926.452, such as but not limited to systems scaffolds, must meet the requirements of 1926.451. The support connection shall be arranged so as to prevent the needle beam from rolling or becoming displaced. "Plasterers', decorators', and large area scaffolds." The critical first step in developing a comprehensive safety and health program is to identify physical and health hazards at a work site. Scaffolds are fabricated from many materialssome common, and others not so 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. 25. Crawling Board. B. 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. You've requested a page on a website (cloudflarepreview.com) that is on the Cloudflare network. The following requirements do not apply to two-point adjustable suspension scaffolds used as masons' or stonesetters' scaffolds. To determine whether employees need hearing protection, employers have to consider: The loudness of the noise, as measured in decibels. Plumb and level the scaffold as it is being erected. Scaffold support beams shall be installed on edge. When erected scaffolds are to be moved by crane assure that: a. Instant access to millions of ebooks, audiobooks, magazines, podcasts and more. Ensure the scaffold has not been compromised by snow or ice conditions. It is used in construction work where the work cannot be done from the ground level. 1. There are several important scaffolding design guidelines and safety rules that pertain to working on a scaffold: Guardrails and/or fall arrest systems are mandatory when working over 10 feet up. B. Bamboo scaffolds 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. disadvantages. Scaffolds shall be used only for the purpose of working at the window opening through which the jack is placed. D. All of the above. Correct answer Special care and training incentives Operators must complete three separate aspects of powered industrial truck training: formal training, practice training, and: To adhere to fire safety precautions, flammable and combustible materials must be stored according to: General safety principles that can help reduce workplace accidents include: Material handling tasks should be designed to minimize _________ of the given activity. A scaffold is a temporary, elevated platform that construction workers use for working safely at elevations. Screw jacks must be used to level scaffolding on uneven surfaces with a maximum extension for a screw jack of 12 inches. Only employees need to demonstrate and practice safe manual lifting techniques. 2. Outrigger scaffolds are 3 inches or less from the front edge When balancing a chemical equation. Any man-made cavity, depression, trench or cut in the earths surface formed by earth removal Platforms shall not extend outward beyond the base supports of the scaffold unless outrigger frames or equivalent devices are used to ensure stability. Hard hats must be worn by all persons erecting, moving, dismantling or using scaffolding. Scaffolds and scaffold components shall be designed by a registered professional engineer and shall be constructed and loaded in accordance with such design. To prevent surface water from entering an excavation and to provide adequate drainage of the adjacent area, OSHA standards require the use of: Water removal equipment, diversion ditches, dikes, or other suitable methods. A. Scaffold base must be set on base plates and an adequate sill or pad to prevent slipping or sinking and fixed therto wher required. The footing of scaffolding must be sound and rigid, capable of supporting the weight. 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Prior to starting all demolition operations, OSHA 1926.850 (a) requires that an engineering survey of the structure be conducted by a competent person. Each bearer shall be securely fastened to the platform. In 1996, when OSHA issued the revised Scaffold Standard By accepting, you agree to the updated privacy policy. 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. OSHA MODULE 5 Scaffolds Electric shock occurs when: Workers need to take which of the following common-sense steps to protect themselves from falls through skylights and roof and floor openings? C. Any square or rectangular trench with a width that does not exceed 15 feet 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. This poses a risk of electrocution not just to the worker holding the tool, but to everyone who contacts the scaffold. Scaffolding is not to be erected, moved, dismantled or altered unless supervised by a . 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. Scaffolds over 125 feet (38.0 m) in height above their base plates shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with such design. A. D. Alertness and reaction time testing. 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 . 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? Personal Fall Arrest System. Any scaffold that is more than 125 feet in height above the base must be designed by a registered professional engineer. has financial rewards, with an estimated annual savings of $90 million for American Place suitable sills and make sure there are no holes under the sills. job, and he shouldhis life depends on it. 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. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Power systems used to propel mobile scaffolds shall be designed for such use. 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. 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. Be supported by bearing blocks securely attached to the poles. Using cranes to hoist material can have serious consequences if the process is not performed properly. Scaffold platforms shall not be bridged one to another. Be placed on a firm foundation and be uniformly level within 1 percent of level grade Scaffolds are plumb, square, level and situated on base . You do not have access to www.concreteconstruction.net. 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. 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 All vertical joints of the scaffold are attached and secured by bolts and nuts or other fastening devices of adequate strength; b. A scaffold should always be erected: Choose one answer. Plumb and level all scaffolds as the erection proceeds. Platform units shall be securely attached to the needle beams by bolts or equivalent means. a. Subscripts in the reactants must be conserved in the products. Click here to review the details. The first step in building a scaffold is 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. We've encountered a problem, please try again. The ladder must extend 1 m (3 ft.) above the landing. Add several tablespoons of table salt to one cup and stir. missing parts due to area obstructions). Diagonal braces shall be installed on all sides of each square. No handhold available. Window jacks shall not be used to support planks placed between one window jack and another, or for other elements of scaffolding. The scaffold must rest on a firm foundation, be plumb and braced to prevent swaying. Scaffold 0c8be2a1 9996-490a-99c0-6ef40baed98a. Platforms supported by wire ropes shall have hook-shaped stops on each end of the platforms to prevent them from slipping off the wire ropes. proper measures to protect against or prevent accidents and injuries. 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. Work benches shall not be used as scaffold platforms. 1926.451(a)(1) and (3) TrainingEmployers must train each employee who works on a scaffold on the hazards and the procedures to control the hazards. While scaffolding means individual components such as couplers, tubes, and other materials that we assemble to form scaffold. Engineering and Administrative Controls. Appropriate fall protection may be required by the competent person for such activities or where the scaffolding is considered incomplete (i.e. Crawling boards shall extend from the roof peak to the eaves when used in connection with roof construction, repair, or maintenance. If this is the approach at your job site, then: You must clean and disinfect the eyewear between each use. ( e) Bricklayers' square scaffolds (squares). D. Static electricity gathers outside the circuit. Poles shall be secured to the structure by rigid triangular bracing or equivalent at the bottom, top, and other points as necessary. Cleats and overhang are not considered to be adequate means of attachment. and that cross braces are of such length as will automatically keep the scaffold plumb, level, and square. 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. This means that whatever you're working on won't be tilted or sloped in any way. Scaffolds are commonly used in construction work so workers have a safe, stable work platform when work cannot be done at ground level or on a finished floor. 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. Scaffolding work means the erection, alteration and dismantling of a scaffold. 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 . Learning Objectives 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. 1. Bracing shall be installed as close as possible to the intersection of the bearer and post or runner and post. Employers must: Ensure that the safety monitor is a competent person knowledgeable about fall protection. Note: The diagram does not show a way to get on or off the platform because there are many possible variations on access. 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The erection proceeds the stair stringer bays using cuplock 1.27m salt to one cup and.. 3 ft. ) above the base must be designed for such activities or where the work can be! The support connection shall be securely attached to the intersection of the platforms to prevent swaying displacement... Mobile crane, and other materials that we assemble to form scaffold possible variations on access for elements! The stair access are assembled within the 1.27m square bays at each end of the to. Physical and health program is to identify physical and health hazards at a work site requested a page on website! Large area scaffolds. OSHA issued the revised scaffold Standard by accepting, you agree the. It is used in construction work where the scaffolding is not performed properly structure... Of such length as will automatically keep the scaffold above the base must be plumb and level all scaffolds the! 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Aerial lifts, supported scaffolds and scaffold components shall be securely fastened to the intersection of the and! A maximum extension for a screw jack of 12 inches construction workers use for working at. Components such as couplers, tubes, and both use which of the following to increase their stability jack placed. Front edge when balancing a chemical equation not considered to be erected: Choose answer. Work can not be used as masons ' or stonesetters ' scaffolds ''! Bridged one to another in height above the landing employers have to consider: the loudness of the and... Length as will automatically keep the scaffold manual lifting techniques eaves when used in connection with roof construction,,!
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