a scaffold must be erected plumb, square, and level because

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Plan the scaffolding setup a few weeks before the start of the project to make sure the scaffold fits the site. Symptoms of silicosis ____________ , so workers should have a chest x-ray to see if there is lung damage. Because there is always the chance that the wheel wasnt sound and could disintegrate or explode. Which of these is required if the workers body, hands or clothing may come into contact with moving parts? Electric shock occurs when: A. 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. or more per square foot. Any part of a building or structure used to support the scaffold shall be capable of supporting the maximum intended load to be applied. Before a scaffold is moved, each employee on the scaffold shall be made aware of the move. To enforce the federal regulations that ensure that business is conducted in an ethical manner Answer: Those who ( sell or) rent it many times have calculator app or XLS file for it to do that math. Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk 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. 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. feet in the air to build skyscrapers or repair monuments like the Statue of Liberty. D. A hole of any shape with a depth that exceeds 15 feet. Position the first level of bracing as close to the base as possible. A noise level of 95 dB is ______ than the lowest level at which hearing protection is required (85 dB), and your exposure should be limited to six hours or less. D. Rope-ladder scaffolds. Each bracket, except those for wooden bracket-form scaffolds, shall be attached to the supporting formwork or structure by means of one or more of the following: nails; a metal stud attachment device; welding; hooking over a secured structural supporting member, with the form wales either bolted to the form or secured by snap ties or tie bolts extending through the form and securely anchored; or, for carpenters' bracket scaffolds only, by a bolt extending through to the opposite side of the structure's wall. Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. Bearers must extend a minimum of 3 inches over the outside edge of runners. Choose one answer. Other requirements are listed Scaffolds must be designed by a professional engineer in the following situations: Supported scaffolds exceeding: fifteen metres in height above their base support; or Scaffold platforms must be fully decked or planked. "Plasterers', decorators', and large area scaffolds." The blocks for fiber or synthetic ropes shall consist of at least one double and one single block. Crawling Board. 2. ( e) Bricklayers' square scaffolds (squares). B. 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. 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 . If a machine has an exposed pulley and conveyor but the portion of it that is exposed is well underneath the machine, the employer: Must ensure all exposed and accessible sections of the machine are guarded. The body becomes part of the circuit Scaffolds have been around for thousands of years, and there are myriad types and Which of the following is an element of a hearing conservation program? Scaffolding Injuries Approximately 2.3 million construction workers work on scaffolds regularly. (Hold the cups up to your cheeks to tell.) While scaffolding means individual components such as couplers, tubes, and other materials that we assemble to form scaffold. fabricated frame scaffold, the mobile scaffold, the tube and coupler scaffold, the system 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. Couplers shall be of a structural metal, such as drop-forged steel, malleable iron, or structural grade aluminum. 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. 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. Scaffold planks should extend over their end supports not less than 6 inches nor more than 18 inches. Wire ropes shall not be tightened to the extent that the application of a scaffold load will overstress them. Place the planks. Add several tablespoons of table salt to one cup and stir. Learning Objectives Supported scaffolds with a height more than four times that minimum base width (4:1) must be what, According to manufacturer's recommendation's but at a minimum the scaffold must be tied closet to the 4:1 height and them repeated every 20 feet vertically to a scaffold 3 feet wide, How should the guys ties or braces be placed. A scaffold should always be erected: Choose one answer. Every scaffold must be erected by qualified technicians based on the information in the design drawings. Suspension scaffold rigging must at least 6 times the intended load. List at least three of the four main hazards to which persons working on a When erected scaffolds are to be moved by crane assure that: a. 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. The scaffold must be erected with cross, horiz ontal, or diagonal braces, or combination. Provide guards on power tools and other equipment with moving parts. D. To ensure that medical personnel are available for every industry in which there are significant workplace hazards. Scaffolds not specifically addressed by 1926.452, such as but not limited to systems scaffolds, must meet the requirements of 1926.451. Runners and bearers must be installed on edge. This means guardrails, a personal fall arrest system or both, depending on the situation. Scaffolding in this Guide means the individual components, for example tubes, couplers As mentioned in this module, in addition to cave-ins and related hazards, workers involved in excavation work also are exposed to hazards involving: Falls, falling loads and mobile equipment. The checks above are common scaffolding faults to look out for that show you the scaffold structure is unsafe. least three examples of incorporating each of the elements. You've requested a page on a website (cloudflarepreview.com) that is on the Cloudflare network. ( 2) Diagonal braces shall be installed on all sides of each square. Fixed Scaffolding Erection Scaffold must be erected, moved, or disassembled only by and under the supervision of qualied persons. 1. Guardrails should be between 38" and 45" high. OSHA MODULE 5 Scaffolds Transverse bracing forming an "X" across the width of the scaffold shall be installed at the scaffold ends and at least at every third set of posts horizontally (measured from only one end) and every fourth runner vertically. 1926.452 (c) (3) Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. c. The Law of Conservation of Matter must be followed. 3. When only a part of the width of the metal scaffold frame conforms to ladder spacing, then these frames must be erected in a manner that makes a continuous ladder bottom to top, with ladder sides of the frames in a vertical line. Be placed on a firm foundation and be uniformly level within 1 percent of level grade 15% c. 20% d. 25% . There are an estimated $90 million dollars lost because of . 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 . Tensioning of each wire rope used for securing brackets in place or as an anchorage for personal fall arrest systems shall be by means of a turnbuckle at least 1 inch (2.54 cm) in diameter, or by equivalent means. Scaffolding is a temporary structure that provides support for workers, plants, and materials used in building, construction, maintenance, repair, and demolition work. 5% b. Finally, while the scaffold is being erected or dismantled, the workers who are performing that task need a safe access. Employers must: Ensure that the safety monitor is a competent person knowledgeable about fall protection. Frames and panels shall be braced by cross, horizontal, or diagonal braces, or combination thereof, which secure vertical members together laterally. In the United States and Canada, most scaffolds found at jobsites are made of steel, By definition a scaffold is a temporary, elevated platform Boatswains' chair seat slings shall be a minimum of five-eight (5/8) inch (1.6 cm) diameter fiber, synthetic, or other rope which will satisfy the criteria (e.g., strength, slip resistance, durability, etc.) 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. That's one of the reasons why we need to keep it inspected - for safety sake! 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. Risk assessments and safe work method statements are the joint responsibility of the principal contractor and scaffolding employer. D. All of the above. Screw jacks must be used to level scaffolding on uneven surfaces with a maximum extension for a screw jack of 12 inches. D. All of the above. This scaffold is simply a rope attached to a harness with an assembly like a boatswains chair for the worker to sit in. D. Stop using the tool, A. B. Find a more appropriate tool that doesnt cause debris to fly Platforms shall be of the ladder-type, plank-type, beam-type, or light-metal type. A staging area is available. It is used in construction work where the work cannot be done from the ground level. Access between levels is by timber or metal ladders, which are securely tied to the scaffold. Form scaffold-inspection-report-tube-fitting-scaffolds, Construction safety pocket guide osha3252, Why osha scaffold safety training matters scaffold dos and donts, Construction Safety Training_Session 05_Access Equipment and Fall Protection, Safety practice ( SWEDISH COLLEGE OF ENGINEERING WAHCANTT), 5 tips for choosing the best Transportation Management System (TMS).pdf, Tetrahydrocurcumin vs Curcumin What Are The Differences.pdf, 5 Tips on Tenant Referencing for a Speedy Process.pdf, Target And Clinical Trial Progress of ADC In prostate Cancer.pdf, NewBase 02 March -2023 Energy News issue - 1598 by Khaled Al Awadi.pdf, SEAI Business Decarbonisation Supports SSRH and EXEED Schemes launch, No public clipboards found for this slide, Enjoy access to millions of presentations, documents, ebooks, audiobooks, magazines, and more. Scaffolds, once properly erected, are a control measure to prevent the risk of persons and objects falling when working at height. 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 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. Each wire rope used for securing brackets in place or as an anchorage for personal fall arrest systems shall be protected from damage due to contact with edges, corners, protrusions, or other discontinuities of the supporting structure or scaffold components. Scaffolds are fabricated from many materialssome common, and others not so If the use of a power tool can result in flying sparks, metal shavings, wood chips, splashes, or other debris, workers should: A. The scaffold must be plumb, level and squared wi th all brace connections securely fastened. All brace connections must be secured. Diagonal braces shall be installed on all sides of each square. D. Alertness and reaction time testing. A training program to teach proper lifting techniques should cover: A. (8) All ladders used for access shall conform to ladders, Article 25. Wooden bracket-form scaffolds shall be an integral part of the form panel. When wood poles are constructed of two continuous lengths, they shall be joined together with the seam parallel to the bracket. potential hazards that employers and workers need to be aware of so they can take the Any part of a building or structure used to support the scaffold shall be capable of supporting the maximum intended load to be applied. (Do not use insulating Styrofoam cups.) Diagonal bracing in both directions shall be installed across the entire outside face of all double- and single-pole scaffolds. Bearers shall extend a minimum of 3 inches (7.6 cm) over the outside edges of runners. 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 Acceptable fall protection systems allowed include guardrails, safety nets, safety harnesses , positioning device systems and fall restraint systems. How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . Engineering and Administrative Controls. uses. When horses are arranged in tiers, each tier shall be crossbraced. No Free-standing scaffolds be higher than 4 times the minimum base dimension. 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. . disadvantages. 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). Transfer the liquid back and forth between the cups to ensure equal temperatures, ending up with the same amount of water in each cup. Scaffold components. Folding type metal brackets, when extended for use, shall be either bolted or secured with a locking-type pin. The four lifting principles that govern a cranes mobility and safety during lifting operations are: Center of gravity, leverage, stability and structural integrity. Correct answer Special care and training incentives 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 U-bolt wire rope clips shall not be used on any wire rope used to secure brackets or to serve as an anchor for personal fall arrest systems. 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. 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. 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). Hardware should be included to fasten the planks into place. 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 In the case of materials handling, storage, use and disposal, remember that the main hazards are injuries from: Because the number of injuries from operating powered industrial trucks was on the rise, the OSHA standard for Powered Industrial Trucks was revised March 1, 1999. Crawling boards shall be secured to the roof by ridge hooks or by means that meet equivalent criteria (e.g., strength and durability). ", "Single-point adjustable suspension scaffolds.". The SlideShare family just got bigger. Keep Vehicles and Heavy Equipment Clear. OSHA 10-Hour Construction Course: Module 5 Scaffolds Page 1 of 22 Guard or securely cover all holes created or uncovered before leaving a work area This poses a risk of electrocution not just to the worker holding the tool, but to everyone who contacts the scaffold. Step 1 Select and prepare the ground area. Just a few example you can find fast on the interwebs, NFI . of first grade manila rope. work on scaffolds frequently. Scaffolds shall not be bridged one to another. Some simple scaffolds are little more than planks and guardrails over two improper grounding of circuitry and equipment. 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. No employee is on any part of the scaffold which extends outward beyond the wheels, casters, or other supports. that construction workers use for working safely at elevations. when do Falls from scaffolds most likely occur, Guards rails must have a minimum height of _______and they must be installed where, 38 inches and along the open sides and ends of a scaffold, Guardrails are not needed on the fromt ( building side) of the scaffold when, 1. the front end of all platforms is less than 14 inches from the face of the work A thorough understanding of all aspects of 2. Why? Faults: Damaged. Outrigger beams fabricated in the shape of an I-beam or channel shall be placed so that the web section is vertical. Runners shall be interlocked on straight runs to form continuous lengths, and shall be coupled to each post. Click here to review the details. Unsafe scaffolding has the potential to result in death or serious . 4. Do not erect, dismantle or alter a scaffold unless under the supervision of a competent person. and must be provided on any scaffold 10 feet or more above a lower level. 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 be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Bracing shall be installed as close as possible to the intersection of the bearer and post or runner and post. Ladders used to support ladder jacks shall be placed, fastened, or equipped with devices to prevent slipping. 1926.452 - Additional requirements applicable to specific types of scaffolds. They come in a variety of styles and are made from many different materials. 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. The entire inside face of double-pole scaffolds used to support loads of 50 lbs. The critical first step in developing a comprehensive safety and health program is to identify physical and health hazards at a work site. 1926.454 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? 7. Rope connections shall be such that the platform cannot shift or slip. Prior to starting all demolition operations, OSHA 1926.850 (a) requires that: One of the most important elements of the pre-job planning is: Proper equipment for prompt transportation of an injured worker, as well as a communication system to contact any necessary ambulance service, must be available: A structural material with tensioned steel strands embedded inside, which compress the concrete and give it extra strength. Boatswains' chair tackle shall consist of correct size ball bearings or bushed blocks containing safety hooks and properly "eye-spliced" minimum five-eighth (5/8) inch (1.6 cm) diameter first-grade manila rope, or other rope which will satisfy the criteria (e.g., strength and durability) of manila rope. D. Armed robots. Platform units shall be securely attached to the needle beams by bolts or equivalent means. 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. 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. Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. Independent support lines and suspension ropes shall not be attached to the same points of anchorage. B. All other connections of the scaffold are tight and secure; c. All components of the scaffold, including planks, are securely fastened. C. To send every worker home whole and healthy every day Fasten all couplers and/or connections securely before assembling the next level . Now customize the name of a clipboard to store your clips. "Footings shall be level, sound, rigid, and capable of supporting the loaded scaffold without settling or displacement." 1926.451 (c) (2) (i) Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the supervision of a scaffold competent person. 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. What happens to the temperature of the water relative to that of the untreated water? (b) Tube and Coupler Scaffolds. 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. Wood splice plates shall be provided on at least two adjacent sides, and shall extend at least 2 feet (0.6 m) on either side of the splice, overlap the abutted ends equally, and have at least the same cross-sectional areas as the pole. Ropes or hangers shall be used for supports, except that one end of a needle beam scaffold may be supported by a permanent structural member. B. The support connection shall be arranged so as to prevent the needle beam from rolling or becoming displaced. 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. Frequently used types of scaffolds include the When horses are arranged in tiers, each horse shall be placed directly over the horse in the tier below. Simple pretensioned beams and slabs of spans up to about 7 meters (23 feet): Can be demolished in a manner similar to ordinary reinforced concrete, True or False: Electrical detonators can be inadvertently triggered by stray RF (radio frequency) signals from two-way radios. You should have head protection if which of the following apply to your job? Passage may be made from one platform to another only when the platforms are at the same height, are abutting, and walk-through stirrups specifically designed for this purpose are used. Looks like youve clipped this slide to already. When the bearers are coupled to the runners, the couplers shall be as close to the posts as possible. The use of safe lifting postures and timing Poles shall be secured to the structure by rigid triangular bracing or equivalent at the bottom, top, and other points as necessary. These hooks shall be so placed that they will prevent the platform from falling if one of the horizontal wire ropes breaks. Do Not Try To Drive More Than______Hours In Any One Day. Apr. On scaffolds whose length is greater than their height, such bracing shall be repeated beginning at least at every fifth post. Cyber Awareness Challenge 2022 Answers And Notes. Protect themselves by wearing the proper PPE bamboo sticks are still used in some Asian countries to erect large multistory structures. 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. To prevent their displacement, platform units shall be nailed, bolted, or otherwise secured to outriggers. 6. Platforms shall not extend outward beyond the base supports of the scaffold unless outrigger frames or equivalent devices are used to ensure stability. Nothing should lean in any direction. Add lukewarm water to two plastic cups. 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. What Is The Molar Mass Of Calcium Chloride? 1. Instant access to millions of ebooks, audiobooks, magazines, podcasts and more. 9. Many precautions must be taken before scaffolding work can commence. Overhead supporting members (roof structure, ceiling beams, or other structural members) shall be inspected and checked for strength before the scaffold is erected. Scaffolds shall not exceed three tiers in height, and shall be so constructed and arranged that one square rests directly above the other. The bottom runners and bearers shall be located as close to the base as possible. Scaffold erection shall progress in only one direction around any structure. d. Phases are often shown for each compound but are not critical to balancing an equation. For example, if lumber is used, it must be construction grade or Number 1 Grade spruce. General. In addition to this human savings, working safely on scaffolds also Bearers shall extend beyond the posts and runners, and shall provide full contact with the coupler. Cloudflare is currently unable to resolve your requested domain. All ladders used to support ladder jack scaffolds shall meet the requirements of subpart X of this part -- Stairways and Ladders, except that job-made ladders shall not be used to support ladder jack scaffolds. Every element of your orientation must be exact. The mission of the Occupational Safety and Health Administration (OSHA) is: To send every worker home whole and healthy every day. Resist penetration by objects and absorb the shock of a blow. which of the following statements is false? Using cranes to hoist material can have serious consequences if the process is not performed properly. The three main scaffold types are aerial lifts, supported scaffolds and: A. Tubular scaffolds

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a scaffold must be erected plumb, square, and level because