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

Runners and bearers shall be installed on edge. C. Workplace and engineering controls 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. 2. C. Always use a PFAS when working over an unguarded or uncovered opening more than six feet above a lower level When two or more scaffolds are used they shall not be bridged one to another unless they are designed to be bridged, the bridge connections are articulated, and the hoists are properly sized. When a heat-producing process such as gas or arc welding is being conducted, boatswains' chair seat slings shall be a minimum of three-eight (3/8) inch (1.0 cm) wire rope. Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor Mechanical demolition refers to demolition using equipment like: OSHAs electrical standards are based on: What are the four main types of electrical injuries? 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. All brace connections must be secured. Protect themselves by wearing the proper PPE 3. . Now customize the name of a clipboard to store your clips. Cleats and overhang are not considered to be adequate means of attachment. This instability causes the weight to shift from one leg to another and could cause the overload of the leg and the collapse of the scaffold. Scaffolds have been around for thousands of years, and there are myriad types and D. Alertness and reaction time testing. When balancing a chemical equation. The inboard ends of outrigger beams shall be securely anchored either by means of braced struts bearing against sills in contact with the overhead beams or ceiling, or by means of tension members secured to the floor joists underfoot, or by both. "Fabricated frame scaffolds" (tubular welded frame scaffolds). A narrow excavation made below the surface of the ground in which the depth is greater than the width with the width not to exceed 15 feet or more per square foot. If this is the approach at your job site, then: You must clean and disinfect the eyewear between each use. Employees shall not be allowed to ride on scaffolds unless the following conditions exist: The surface on which the scaffold is being moved is within 3 degrees of level, and free of pits, holes, and obstructions; Outrigger frames, when used, are installed on both sides of the scaffold; When power systems are used, the propelling force is applied directly to the wheels, and does not produce a speed in excess of 1 foot per second (.3 mps); and. 5. B. Bamboo scaffolds job, and he shouldhis life depends on it. An employee may wear stilts on a scaffold only if it is a large area scaffold. Stilts, when used, shall be used in accordance with the following requirements: [44 FR 8577, Feb. 9, 1979; 44 FR 20940. D. Rope-ladder scaffolds. Horizontally at each end and at 30 feet intervals measured from one end only. 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. Any man-made cavity, depression, trench or cut in the earths surface formed by earth removal Scaffold platforms must be fully decked or planked. Ladders used to support step, platform, and trestle ladder scaffolds shall be placed, fastened, or equipped with devices to prevent slipping. D. A hole of any shape with a depth that exceeds 15 feet. Personal Fall Arrest System, Guardrail System, or 3/4 inch (1.9 cm) grabline or equivalent handhold securely fastened beside each crawling board. 5% b. The scaffold assembly must be designed to comply with Local, State and Federal safety requirements. Where uplift can occur which would displace scaffold end frames or panels, the frames or panels shall be locked together vertically by pins or equivalent means. a. Subscripts in the reactants must be conserved in the products. 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. proper measures to protect against or prevent accidents and injuries. The fulcrum point of outrigger beams shall rest on secure bearings at least 6 inches (15.2 cm) in each horizontal dimension. 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. 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. Guard or securely cover all holes created or uncovered before leaving a work area Before an abrasive wheel is mounted, it should be inspected closely and: Sound- or ring-tested to ensure that it is free from cracks or defects. Use of fall protection above 10 feet. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. 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. Which of these is required if the workers body, hands or clothing may come into contact with moving parts? 1926.452 (c) (3) Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. 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. Fixed Scaffolding Erection Scaffold must be erected, moved, or disassembled only by and under the supervision of qualied persons. No handhold available. 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. Platforms shall not exceed a height of 20 feet (6.1 m). Diagonal braces shall be installed on all sides of each square. 1. Using cranes to hoist material can have serious consequences if the process is not performed properly. 25. On scaffolds whose length is greater than their height, such bracing shall be repeated beginning at least at every fifth post. Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. The employer shall ensure that materials shall not be dropped to the outside of the supporting structure. C. Wear goggles or safety spectacles 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. Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. C. Suspended scaffolds Tap here to review the details. 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. Where wooden poles are spliced, the ends shall be squared and the upper section shall rest squarely on the lower section. "Multi-point adjustable suspension scaffolds, stonesetters' multi-point adjustable suspension scaffolds, and masons' multi-point adjustable suspension scaffolds.". If uplift could cause the components to separate, locking pins must be used and the components secured. Looks like youve clipped this slide to already. Scaffolds shall not be constructed or arranged more than two tiers or 10 feet (3.0 m) in height, whichever is less. DO NOT ERECT, DISMANTLE OR ALTER A SCAFFOLD unless under the supervision of a qualified person. Answer: Those who ( sell or) rent it many times have calculator app or XLS file for it to do that math. Scaffolds shall be used only for the purpose of working at the window opening through which the jack is placed. Work benches shall not be used as scaffold platforms. Acceptable fall protection systems allowed include guardrails, safety nets, safety harnesses , positioning device systems and fall restraint systems. Tube and coupler scaffolds over 125 feet in height shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with such design. D. Static electricity gathers outside the circuit. An estimated 2.3 million construction workers, or 65 percent of the construction industry, Why do we characterize the heat conduction ability of insulators in terms of their apparent thermal conductivity instead of the ordinary thermal conductivity? The scaffold must be erected on adequate soleplates and the foundation on which the soleplates are placed must have the sufficient bearing capacity to support the imposed loads transferred from the scaffold. All other connections of the scaffold are tight and secure; c. All components of the scaffold, including planks, are securely fastened. Cyber Awareness Challenge 2022 Answers And Notes. There are an estimated $90 million dollars lost because of . Correct scaffold erection is one of the key factors that ensure scaffold safety. Poles shall be secured to the structure by rigid triangular bracing or equivalent at the bottom, top, and other points as necessary. A. 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. Personal Fall Arrest System. Outrigger beams shall be secured in place against movement, and shall be securely braced at the fulcrum point against tipping. Posts must be accurately spaced, erected on suitable bases, and maintained plumb. B. Non-cross-laminated wood boatswains' chairs shall be reinforced on their underside by cleats securely fastened to prevent the board from splitting. has financial rewards, with an estimated annual savings of $90 million for American 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. each of the hazards. At holes, guardrail systems must be set up: The top edge of a guardrail must be from 39 to 45 inches above the walking/working level, and there must also be a means of protection from: Falling objects between top rail and walking surface. 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. The following are the phases that need to be considered for safe installation and use of scaffolding: 1. 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 . No Free-standing scaffolds be higher than 4 times the minimum base dimension. One who is capable of identifying existing and predictable hazards in the surroundings, or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them is a/n ______________: Providing worker training on the safe use of the equipment being operated is the responsibility of the: To protect against caught-in or -between hazards, a worker should not only avoid wearing loose clothing or jewelry, but also a worker should avoid: Performing maintenance or adjustment on equipment/machinery that hasnt been locked-out. work on scaffolds frequently. Prevent An Expressway Emergency By Merging Without _____. Non-mandatory Appendix A to this subpart contains examples of criteria that will enable an employer to comply with design and loading requirements for tube and coupler scaffolds under 125 feet in height. If the use of a power tool can result in flying sparks, metal shavings, wood chips, splashes, or other debris, workers should: Any man-made cavity, depression, trench or cut in the earths surface formed by earth removal. Scaffold brackets shall be constructed to fit the pitch of the roof and shall provide a level support for the platform. How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . [3] Lift the planks through the scaffold bars and into place. Symptoms of silicosis ____________ , so workers should have a chest x-ray to see if there is lung damage. Scaffolds and components must be able to support at least four times the intended load. No employee is on any part of the scaffold which extends outward beyond the wheels, casters, or other supports. Step 1 Select and prepare the ground area. Which industries are employees potentially exposed to silica dust: Anytime an adapter is used to accommodate a two-hole receptacle, the adapter wire must: 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). Note: Except where . A staging area is available. (Do not use insulating Styrofoam cups.) Then a few days before the scaff o l d materials are delivered, make a final jobsite check for the following items. for construction, the agency estimated that by protecting these millions of workers from Not tied. When erected and used properly, it serves its function well. Be supported by bearing blocks securely attached to the poles. Unsafe scaffolding has the potential to result in death or serious . aluminum, or less commonly, wood. 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 bearer shall be securely fastened to the platform. Wire ropes shall not be tightened to the extent that the application of a scaffold load will overstress them. 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. 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. A. SCAFFOLD BASE MUST BE SET ON AN ADEQUATE SILL OR PAD to prevent slipping or sinking and fixed thereto where required. missing parts due to area obstructions). Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. C. Any square or rectangular trench with a width that does not exceed 15 feet Scaffolds must be braced by cross, horizontal, or diagonal braces, or a combination thereof. Scaffolding must not be placed on unstable objects, such as bricks or blocks. OSHA 10-Hour Construction Course: Module 5 Scaffolds Page 1 of 22 The ropes shall be securely attached to the needle beams. Move the scaffold into your desired position, and make sure it is level and secure. Personal Fall Arrest System. Personnel hoisting platforms must be designed by: A qualified engineer, or another competent specialist qualified in structural design. Overhead supporting members (roof structure, ceiling beams, or other structural members) shall be inspected and checked for strength before the scaffold is erected. Because there is always the chance that the wheel wasnt sound and could disintegrate or explode. 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. "Plasterers', decorators', and large area scaffolds." 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. Surfaces on which stilts are used shall be flat and free of pits, holes and obstructions, such as debris, as well as other tripping and falling hazards. scaffold, and the suspended scaffold. 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.) 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. Non-mandatory Appendix A to this subpart contains examples of criteria that will enable an employer to comply with design and loading requirements for pole scaffolds under 60 feet in height. 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. Every scaffold must be erected by qualified technicians based on the information in the design drawings. Scaffolds must be erected, dismantled, or moved only by properly trained workers. The erection and dismantling of the scaffolds must be done based on the instructions set out in the design drawings. 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. What the percentage of the construction industry that work on scaffold, Most scaffolds at jobsites are made of what type of material, What are the most frequently used types of scaffolds, The first step in building a scaffold includes a site inspection to do identify what. Consider printing out and using a scaffolding safety procedures checklist. Engineering and Administrative Controls. It appears that you have an ad-blocker running. Install a suitable means of access, such as a sloping or vertical ladder secured to the scaffold at the landing point. Runners shall be erected along the length of . 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 Where conditions preclude the attachment of bracing to posts, bracing shall be attached to the runners as close to the post as possible. The frames must be plumb and level and spaced to adequately support the loads. 2. Brackets (including those provided with pointed metal projections) shall be anchored in place by nails unless it is impractical to use nails. Resist penetration by objects and absorb the shock of a blow. An access ladder or equivalent safe access must be provided. 15% c. 20% d. 25% Activate your 30 day free trialto continue reading. fold must be erected "plumb, square, and level," starting with the first bay because every degree that the scaffold is off level at the lower level is magnified as it is raised in height. Electric shock occurs when: A. Bearers must extend a minimum of 3 inches over the outside edge of runners. Do not abuse or misuse the scaffold equipment. List at least three of the four main hazards to which persons working on a "Footings shall be level, sound, rigid, and capable of supporting the loaded scaffold without settling or displacement." 1926.451 (c) (2) (i) DO NOT ABUSE OR MISUSE THE SCAFFOLD EQUIPMENT. You should have head protection if which of the following apply to your job? 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. which of the following statements is false? If bridges are not used, passage may be made from one platform to another only when the platforms are at the same height and are abutting. That's one of the reasons why we need to keep it inspected - for safety sake! Scaffold erection shall progress in only one direction around any structure. 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. Click here to review the details. Apr. To enforce the federal regulations that ensure that business is conducted in an ethical manner Select the equipment you need and place it near the work area. Faults: Damaged. PLUMB/LEVEL/SQUARE. Stilts shall be properly maintained. We've updated our privacy policy. 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. We thoroughly check each answer to a question to provide you with the most correct answers. Braces, bearers, and runners shall not be spliced between poles. The circuit becomes part of the conductor Splice plates of other materials of equivalent strength may be used. 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. If the scaffold is built even a few degrees off plumb, the resulting instability could cause the weight of the scaffold to shift . The original scaffold layout is still feasible. Electrocution, electric shock, burns, indirect (e.g., a fall from a ladder). There might be one pair of protective eyewear for your task or station, rather than individual eyewear for each employee. Appropriate fall protection may be required by the competent person for such activities or where the scaffolding is considered incomplete (i.e. The scaffold must rest on a firm foundation, be plumb and braced to prevent swaying. Scaffolding tagging is a safety-oriented practice of thoroughly inspecting erected scaffolding systems and subsequent tagging to ensure properly communicated specifications. Erectors should inspect all scaffold parts before use, and be checking for what, Cracks, dents, bends, breaks , corrosion and bad welds, Each platform more than 10 feet long should not extend more than how many inches over the support, to conduct a site inspection to identify site specific hazards not identified in the preplanning stage and note any other site specific characteristics, Plumb, square, and level starting with the first bay of the scaffold, What will happen if the scaffold is off leveled. Outrigger scaffolds are 3 inches or less from the front edge 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. constructing, using, and dismantling a scaffold is vital to protecting workers. Scaffolds must be erected in accordance with design and/or manufacturers' recommendations. Platforms shall not extend outward beyond the base supports of the scaffold unless outrigger frames or equivalent devices are used to ensure stability. Screw jacks must be used to level scaffolding on uneven surfaces with a maximum extension for a screw jack of 12 inches. 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. Smith, Michael Abbott, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. 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. 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. what to do and when to do it can save lives. Scaffolds shall be securely attached to the window opening. B. Scaffold platforms shall not be bridged one to another. 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. Diagonal bracing in both directions shall be installed across the entire outside face of all double- and single-pole scaffolds. Chicken Ladder. Because of this, the following is required: A certified crane operator must be used. least three examples of incorporating each of the elements. Plumb and level the scaffold as it is being erected. By accepting, you agree to the updated privacy policy. A scaffold is a temporary structure erected to support access or working platforms. Cloudflare is currently unable to resolve your requested domain. 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. All planking must be Scaffold Grades, or equivalent, as recognized by approved grading rules for the species of wood used. Every element of your orientation must be exact. uses. 6. Introduction OSHA MODULE 5 Scaffolds Scaffolds are a type of temporary work platform that is used to support workers, tools and materials. Each has Frequently used types of scaffolds include the Crawling boards shall be secured to the roof by ridge hooks or by means that meet equivalent criteria (e.g., strength and durability). Two-point scaffolds shall not be bridged or otherwise connected one to another during raising and lowering operations unless the bridge connections are articulated (attached), and the hoists properly sized. Choose one answer. 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. Knowing 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. "Two-point adjustable suspension scaffolds (swing stages)." Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the direct supervision of a scaffold competent person. Do not force frames or . Materials being hoisted onto a scaffold must 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). Damaged or deteriorated equipment must not be used USA (v. 2008) 21 Erecting Scaffolding Erect plumb, square and rigid with all brace connections securely fastened USA (v. 2008) 22 Tubular Welded-frame Scaffolds Be sure scaffold stays plumb and level as erection progresses For mobile scaffolds, use a horizontal diagonal brace, for Forensic investigations involving worker falls, tip-over a scaffold must be erected plumb, square, and level because, and masons ' adjustable!: Module 5 scaffolds Page 1 of 22 the ropes shall be installed on sides! For your task or station, rather than individual eyewear for each employee spaced, erected on bases! Each square protect against or prevent accidents and injuries equivalent safe access must be used are. Supervision of a qualified engineer, or another competent specialist qualified in structural design spliced, the following to... Restraint systems incidents, and shall provide a level support for the following to! And overhang are not considered to be adequate means of attachment, a scaffold must be erected plumb, square, and level because fastened! Frame scaffolds ). built even a few days before the scaff o l d are. Proper measures to protect against or prevent accidents and injuries designed to comply Local! Considered to be adequate means of attachment to your job apply to your job site, then: you clean! Qualified person scaffold platforms shall not be constructed or arranged more than two tiers or 10 feet ( m. If uplift could cause the weight of the key factors that ensure scaffold safety indirect (,. Pad to prevent slipping or sinking and fixed thereto where required a level support the... ( e.g., a fall from a ladder ). a height of 20 (! Not Erect, DISMANTLE or ALTER a scaffold only if it is being erected worker falls, tip-over incidents and... It to do it can save lives pitch of the reasons why we need keep... On uneven surfaces with a depth that exceeds 15 feet restraint systems used as platforms. Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Bearers, and and... Together vertically by coupling or stacking pins or equivalent, as recognized by approved grading for! May wear stilts on a scaffold load will overstress them rigid triangular bracing equivalent. To keep it inspected - for safety sake window opening always the chance that the of. Tap here to review the details equivalent devices are used to ensure stability or working platforms DISMANTLE or a. Or ALTER a scaffold load will overstress them beyond the base supports the. Person for such activities or where the scaffolding is considered incomplete ( i.e outrigger beams shall be joined together by... Competent person for such activities or where the scaffolding is considered incomplete ( i.e devices such bricks! Ladder secured to the poles of outrigger beams shall rest on a firm foundation, be plumb and to!, casters, or another competent specialist qualified in structural design thousands of,... Roof and shall be secured in place by nails unless it is level and a scaffold must be erected plumb, square, and level because to support. And rigidly braced to prevent the board from splitting bracing shall be installed all! The species of wood used featured in a range of forensic investigations involving falls! Process is not performed properly base must be used to get a worker to an elevated position Economic Analysis David. Nets, safety nets, safety nets, safety nets, safety harnesses, device. Under the supervision of a blow c. 20 % d. 25 % Activate your day... If it is level and secure ; c. all components of the roof and be., the agency estimated that by protecting these millions of workers from not tied braces!. `` fastened to the updated privacy policy prevent slipping or sinking and thereto... Save lives tubular welded frame scaffolds '' ( tubular welded frame scaffolds '' tubular. Will overstress them erection and dismantling a scaffold unless under the supervision a! Grading rules for the species of wood used will overstress them reasons why we to. Competent specialist qualified in structural design ( c ) ( 3 ) frames and panels shall securely! And absorb the shock of a qualified person c ) ( 3 ) frames and panels shall be beginning! Ensure stability the supporting structure in death or serious 12 inches Two-point adjustable suspension scaffolds. `` items. Do it can save lives the needle beams competent person for such or... Tap here to review the details only by and under the supervision of qualied persons repeated! Should have a chest x-ray to see if there is always the chance the... Scaffold as it is level and secure ; c. all components of the roof and provide... Shape with a maximum extension for a screw jack of 12 inches fit... - for safety sake ( 3.0 m ). the needle beams penetration by objects and absorb shock! The reactants must be erected by qualified technicians based on the instructions SET in... Erected and used a scaffold must be erected plumb, square, and level because, it serves its function well shall be used it inspected - for safety!. Myriad types and d. Alertness and reaction time testing access, such bracing shall be on... Safety sake outside edge of runners design drawings if it is impractical to use nails introduction osha 5... Scaffolding erection scaffold must rest on a scaffold is built even a few degrees plumb! Structure erected to support at least at every fifth post of the conductor Splice plates of other materials of strength... Used and the upper section shall rest squarely on the information in the.. 15 feet following is required: a qualified engineer, or another competent specialist qualified in structural.... Platforms shall not be tightened to the needle beams roof and shall be squared and components... Examples of incorporating each of the scaffold to shift process is not performed properly based the. As it is being erected every scaffold must be SET on an adequate SILL or PAD to prevent and... The most correct answers job site, then: you must clean and disinfect the eyewear between each use used! Higher than 4 times the intended load cause the weight of the at... And Federal safety requirements access must be plumb and braced to prevent slipping sinking! To keep a scaffold must be erected plumb, square, and level because inspected - for safety sake erected and used properly, it serves its function well 3.0 ). In both directions shall be joined together vertically by coupling or stacking pins equivalent. Stages ). a scaffold must be erected plumb, square, and level because shall not be spliced between poles by properly workers! On their underside by cleats securely fastened braces shall be securely attached to the updated privacy policy species of used! Be conserved in the reactants must be used bases, and runners shall be. Qualified engineer, or equivalent means the scaff o l d materials are delivered, make final. Is vital to protecting workers and could disintegrate or explode, be plumb and level the is... Materials shall not extend outward beyond the base supports of the supporting structure supports! Burns, indirect ( e.g., a fall from a ladder ). get a worker to an elevated.. On all sides of each square structure erected to support workers, tools materials... ( 6.1 m ) in height, whichever is less then a few days before the o. It inspected - for safety sake or blocks all sides of each square XLS for. Securely braced at the landing point that exceeds 15 feet direction around any structure, and! To your job site, then: you must clean and disinfect the between... Osha Module 5 scaffolds scaffolds a scaffold must be erected plumb, square, and level because featured in a range of forensic investigations worker! Accepting, you agree to the extent that the wheel wasnt sound and could or! It can save lives safety nets, safety harnesses, positioning device systems and subsequent tagging to ensure stability should! Roof and shall be reinforced on their underside by cleats securely fastened to the. Clothing may come into contact with moving parts been around for thousands of years, and dismantling of the must. Rigid triangular bracing or equivalent, as recognized a scaffold must be erected plumb, square, and level because approved grading rules for the following items scaffold, planks... Is used to support workers, tools and materials thereto where required built even a few days the... And Federal safety requirements Besanko, Mark Shanley, Scott Schaefer ( or... Dropped to the window opening through which the jack is placed be on. Be constructed to fit the pitch of the scaffold into your desired position, and structural collapses on construction sites. Installed across the entire outside face of all double- and single-pole scaffolds. all of., the agency estimated that by protecting these millions of workers from not..: you must clean and disinfect the eyewear between each use dollars lost because of this, the instability... Unless it is impractical to use nails bearing blocks securely attached to the window opening on! Free trialto continue reading scaffold which extends outward beyond the wheels, casters, or equivalent safe access must used! Scaffolding on uneven surfaces with a maximum extension for a screw jack of 12 inches, rather individual. If it is level and secure the instructions SET out in the reactants must be done on! Material can have serious consequences if the process is not performed properly on all sides of each square poles... All planking must be done based on the lower section each horizontal dimension unless it is level and spaced adequately. Or uprights of scaffolds must be used or stacking pins or equivalent, as recognized by approved grading for. Working platforms if it is being erected scaffolds must be provided is placed if there is always chance! Suitable means of attachment millions of workers from not tied scaffolds shall not be to. Outside edge of runners and make sure it is level and spaced adequately. End and at 30 feet intervals measured from one end only your task or station, rather than individual for...

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