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. Scaffolds are plumb, square, level and situated on base . The platform shall be supported by a minimum of two bearers, each of which shall project a minimum of 6 inches (15.2 cm) beyond the platform on both sides. The use of gray cast iron is prohibited. 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. 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. The entire supporting structure shall be securely braced to prevent any horizontal movement. In addition to the applicable requirements of 1926.451, the following requirements apply to the specific types of scaffolds indicated. By accepting, you agree to the updated privacy policy. Platforms shall not exceed a height of 20 feet (6.1 m). Wire ropes shall be continuous and without splices between anchors. True or False: Only personnel instructed in the requirements of the standard and the task to be performed along with their tools, equipment and materials needed for the job are allowed on the platform. How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . 9. C. Any square or rectangular trench with a width that does not exceed 15 feet 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.) 1. Electricity travels in closed circuits, and its normal route is through a conductor. A scaffold must be erected "plumb, square, and level," because: Answer: 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 Learning Objectives True or False: Before the advent of OSHA, a cohesive system of separate rules existed that effectively governed the American workplace. 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. "Fabricated frame scaffolds" (tubular welded frame scaffolds). Each bracket shall be attached to the securing wire rope (or ropes) by a positive locking device capable of preventing the unintentional detachment of the bracket from the rope, or by equivalent means. 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. that construction workers use for working safely at elevations. ( 1) Scaffolds made of wood shall be reinforced with gussets on both sides of each corner. 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. Brackets (including those provided with pointed metal projections) shall be anchored in place by nails unless it is impractical to use nails. 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. PLUMB/LEVEL/SQUARE. Unsafe scaffolding has the potential to result in death or serious . 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. 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 Scaffolds have been around for thousands of years, and there are myriad types and 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. The bottom runners and bearers shall be located as close to the base as possible. 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. What the definition of a Suspension scaffolds, one or more platforms suspended by ropes or other non rigid means from an overhead structure. Personal Fall Arrest System. Supported scaffold poles, legs . Braces, bearers, and runners shall not be spliced between poles. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. 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 Work benches shall not be used as scaffold platforms. Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Severe Storm and Flood Recovery Assistance. Identify the three essential elements of safe scaffold construction, and give at 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. of first grade manila rope. Provide guards on power tools and other equipment with moving parts. work on scaffolds frequently. Diagonal braces shall be installed on all sides of each square. 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. Place suitable sills and make sure there are no holes under the sills. 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. Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. 4. Correct answer Special care and training incentives B. Bamboo scaffolds Posts must be accurately spaced, erected on suitable bases, and maintained plumb. Add several tablespoons of table salt to one cup and stir. 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 Every degree that the scaffold is off leveled will be magnified as the scaffold is raised in height. 1. Crawling boards shall be secured to the roof by ridge hooks or by means that meet equivalent criteria (e.g., strength and durability). The mission of the Occupational Safety and Health Administration (OSHA) is: To send every worker home whole and healthy every day. a scaffold must be erected plumb, square and level because [, A space of at least 3 inches between handrails, or stair rails used as handrails, and other objects. 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. Upon completion of the lesson, participants will be able to: It is used in construction work where the work cannot be done from the ground level. Catenary Scoffold. D. All of the above. [3] Lift the planks through the scaffold bars and into place. 6. 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. Prior to starting all demolition operations, OSHA 1926.850 (a) requires that an engineering survey of the structure be conducted by a competent person. 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. The fulcrum point of outrigger beams shall rest on secure bearings at least 6 inches (15.2 cm) in each horizontal dimension. Forklift operators should ground the forks of the forklift, turn the forklift off, set the parking brake, and _____________prior to dismounting the machine. feet in the air to build skyscrapers or repair monuments like the Statue of Liberty. Scaffolds shall be suspended from metal outriggers, brackets, wire rope slings, hooks, or means that meet equivalent criteria (e.g., strength, durability). These hooks shall be so placed that they will prevent the platform from falling if one of the horizontal wire ropes breaks. Frames and panels shall be joined together vertically by coupling or stacking pins or equivalent means. The critical first step in developing a comprehensive safety and health program is to identify physical and health hazards at a work site. missing parts due to area obstructions). 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). Bearers shall extend a minimum of 3 inches (7.6 cm) over the outside edges of runners. 1926.454 An estimated 2.3 million construction workers, or 65 percent of the construction industry, 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: A. You do not have access to www.concreteconstruction.net. 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). Crawling Board. To ensure scaffolding safety, the scaffold must be built under the supervision of a competent person; someone who has been thoroughly trained on safe work practices when working on scaffoldings. Stilts shall be properly maintained. 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. Posts must be accurately spaced, erected on suitable bases, and maintained in plumb. Personal Fall Arrest System, Guardrail System, or 3/4 inch (1.9 cm) grabline or equivalent handhold securely fastened beside each crawling board. Remote detonators to implode a structure One or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames, or similar rigid supports. proper measures to protect against or prevent accidents and injuries. C. Have all brakes and locking devices set when the occupied personnel platform is in stationary position e) must be made of pipe E WCB Regulations state: Tubular and similar type section scaffolding shall be erected plumb and _____. . Plumb and level the scaffold as it is being erected. 1926.452 - Additional requirements applicable to specific types of scaffolds. The three elements of a basic program for electrical safety are: All portable electric tools that are damaged shall be: If you have a three-prong plug and a two-hole receptacle, it is acceptable to: Use an adapter with an adapter wire connected to known ground. A supported scaffolding height-to-base ratio of . D. Stop using the tool, A. 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. 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. Scaffolds shall be used only for the purpose of working at the window opening through which the jack is placed. Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. Choose one answer. That requirement reflects the additional hazards and structural stress involved with such heights. Scaffolding refers to the plant components and materials that, when assembled, form a scaffold. Save my name, email, and website in this browser for the next time I comment. ( 2) Diagonal braces shall be installed on all sides of each square. Yet, because of the nature of where and how it is used, scaffolding can present many potential hazards. In noisy jobsites, these are often used to provide instructions to crane and derrick operators: Since its implementation in 1971, OSHA has: Helped cut work-related fatalities nearly in half and cut excavation and trenching fatalities by more than a third. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the direct supervision of a scaffold competent person. Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor. Crossbracing shall be installed between the inner and outer sets of poles on double pole scaffolds. Extreme weather or damage to structural components can also affect a scaffold's stability. Do not abuse or misuse the scaffold equipment. Guardrails should be between 38" and 45" high. DO NOT ERECT, DISMANTLE OR ALTER A SCAFFOLD unless under the supervision of a qualified person. We've updated our privacy policy. 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. for construction, the agency estimated that by protecting these millions of workers from In this article, Civil Engineer and Construction Safety Expert, Robert J. O'Connor discusses the anatomy of a baker scaffold, proper assembly, common hazards and relevant safety standards. When platforms are being moved to the next level, the existing platform shall be left undisturbed until the new bearers have been set in place and braced prior to receiving the new platforms. Caster stems and wheel stems shall be pinned or otherwise secured in scaffold legs or adjustment screws. 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. D. All of the above. Just a few example you can find fast on the interwebs, NFI . 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. That's one of the reasons why we need to keep it inspected - for safety sake! The mission of the Occupational Safety and Health Administration (OSHA) is: A. OSHA promulgated the Final Rule for Powered Industrial Truck Operator Training [29 CFR 1910.178(1)], which: Requires operator training and licensing as well as periodic evaluations of operator performance. When horses are arranged in tiers, each tier shall be crossbraced. 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. prevented every year. Splice plates of other materials of equivalent strength may be used. Runners shall be interlocked on straight runs to form continuous lengths, and shall be coupled to each post. Frames and panels shall be braced by cross, horizontal, or diagonal braces, or combination thereof, which secure vertical members together laterally. You can read the details below. For example, if lumber is used, it must be construction grade or Number 1 Grade spruce. Scaffolding work means the erection, alteration and dismantling of a scaffold. Specific requirements are described below. Cross braces must keep the scaffold plumb, level, and square; All brace connections must be secured to prevent dislodging; Frames and panels must be joined together vertically by coupling or stacking pins or equivalent means; Frames and panels must be locked together to prevent uplift (separation of a Independent support lines and suspension ropes shall not be attached to the same points of anchorage. Step 1 Select and prepare the ground area. The ladder must extend 1 m (3 ft.) above the landing. This means guardrails, a personal fall arrest system or both, depending on the situation. Power systems used to propel mobile scaffolds shall be designed for such use. 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. The noise exposure measurement your employer makes must include all continuous, intermittent and ______ noise within a range of 80 dB to 130 dB. The maximum permissible span for 2 X 10 inch or wider planks is shown below in "Material." . B. Scaffolds are fabricated from many materialssome common, and others not so Scaffolds shall not be bridged one to another. 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. Runners must: Extend over two poles at minimum. Any man-made cavity, depression, trench or cut in the earths surface formed by earth removal uses. 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. Each has what to do and when to do it can save lives. Move the scaffold into your desired position, and make sure it is level and secure. No employee is on any part of the scaffold which extends outward beyond the wheels, casters, or other supports. Scaffold platforms shall not be bridged one to another. 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 The support connection shall be arranged so as to prevent the needle beam from rolling or becoming displaced. Approximately 75 percent of struck-by fatalities involve: It is preferable not to drive a vehicle in reverse if you have an obstructed rear view, but if you do, make sure: Workers are most at risk from falling objects when standing or working: To prevent injury from flying debris, use safety glasses, goggles, face shields, etc., where machines or tools may cause flying particles; and always inspect tools, such as saws and lathes, to ensure that: The protective guards are in good condition and firmly attached. Position the first level of bracing as close to the base as possible. 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. The scaffold is positioned so that swinging cannot bring the scaffold into contact with another surface. Plumb and level all scaffolds as the erection proceeds. Symptoms of silicosis ____________ , so workers should have a chest x-ray to see if there is lung damage. Personal Fall Arrest System. 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. 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. Scaffolds shall be plumb, level, and squared. We need to follow scaffolding safety procedures. Two other errors mentioned in this module that often lead to trouble are: Improper maintenance and failure to conduct regular inspections. Ladders used to support step, platform, and trestle ladder scaffolds shall be placed, fastened, or equipped with devices to prevent slipping. A. and must be provided on any scaffold 10 feet or more above a lower level. The circuit becomes part of the conductor Why? Cloudflare is currently unable to resolve your requested domain. The employer shall ensure that materials shall not be dropped to the outside of the supporting structure. This scaffold is simply a rope attached to a harness with an assembly like a boatswains chair for the worker to sit in. A staging area is available. 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. Scaffold 0c8be2a1 9996-490a-99c0-6ef40baed98a. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Found a mistake? Fixed Scaffolding Erection Scaffold must be erected, moved, or disassembled only by and under the supervision of qualied persons. Runners shall extend over a minimum of two poles, and shall be supported by bearing blocks securely attached to the poles. Screw jacks must be used to level scaffolding on uneven surfaces with a maximum extension for a screw jack of 12 inches. d. Phases are often shown for each compound but are not critical to balancing an equation. The frames must be plumb and level and spaced to adequately support the loads. Scaffolds shall not exceed three tiers in height, and shall be so constructed and arranged that one square rests directly above the other. Ensure the surface on which the scaffold will be erected is firm, level and capable of Learn faster and smarter from top experts, Download to take your learnings offline and on the go. Float Scaffold. It appears that you have an ad-blocker running. While scaffolding means individual components such as couplers, tubes, and other materials that we assemble to form scaffold. D. Alertness and reaction time testing. Risk assessments and safe work method statements are the joint responsibility of the principal contractor and scaffolding employer. 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. Scaffold support beams shall be installed on edge. We've encountered a problem, please try again. Insufficient length. B. All other connections of the scaffold are tight and secure; c. All components of the scaffold, including planks, are securely fastened. Scaffold levels used only as a walkway must have what, planking or decking at least 18 inches wide or fall protection must be provided and used, Before builders can permit the use of a scaffold what must be done, Fall protection systems and falling object protection must be installed on any scaffold more than 10 feet above a lower level, The most effective protection to shield employees from falling objects is, Installing debris nets, canopies, and screens, Whats the definition of a Supported scaffold. In general, head protection should do which of the following? Platforms shall not be more than 36 inches (0.9 m) wide unless designed by a qualified person to prevent unstable conditions. The ground is level and stable. C. Both A and B Personnel hoisting platforms must be designed by: A qualified engineer, or another competent specialist qualified in structural design. 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. 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. 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. common. Not tied. D. Friendly weightlifting competitions among workers to build strength. Cyber Awareness Challenge 2022 Answers And Notes. "Footings shall be level, sound, rigid, and capable of supporting the loaded scaffold without settling or displacement." 1926.451 (c) (2) (i) Guard or securely cover all holes created or uncovered before leaving a work area List at least three of the four main hazards to which persons working on a To secure fair compensation for workers who have been injured in accidents 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 . Every scaffold must be erected by qualified technicians based on the information in the design drawings. Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk 10. A. SCAFFOLD BASE MUST BE SET ON AN ADEQUATE SILL OR PAD to prevent slipping or sinking and fixed thereto where required. Scaffolding, also called scaffold or staging, is a temporary structure used to support a work crew and materials to aid in the construction, maintenance and repair of buildings, bridges and all other man-made structures.Scaffolds are widely used on site to get access to heights and areas that would be otherwise hard to get to. C. Workplace and engineering controls In the United States and Canada, most scaffolds found at jobsites are made of steel, Scaffolding means a convenient platform for persons to work at height. Uplift might be caused by the action of wind on a secured deck or by the leverage action of a cantilever side bracket on the scaffold. Only employees need to demonstrate and practice safe manual lifting techniques. Runners and bearers shall be installed on edge. The original scaffold layout is still feasible. 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 . 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. Activate your 30 day free trialto unlock unlimited reading. It provides a safe and stable platform for workers. Introduction When horses are arranged in tiers, each horse shall be placed directly over the horse in the tier below. Smith, Michael Abbott, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. B. Ladders are used to provide access to different levels of the scaffold, although sometimes steps will be used to improve safety. Prevent An Expressway Emergency By Merging Without _____. B. . Scaffold erection shall progress in only one direction around any structure. Situated on base with pointed metal projections ) shall be interlocked on straight to... Be bridged one to another horse shall be continuous and without splices between anchors Mark Shanley, Scott.! ) in each horizontal dimension and stable platform for workers plumb, and shall be so placed that will! Answer Special care and training incentives b. Bamboo scaffolds posts must be accurately spaced, erected on bases! Securely and rigidly braced to prevent swaying and displacement the Additional hazards and structural stress involved with such heights scaffold! While scaffolding means individual components such as couplers, tubes, and maintained plumb structural... Scaffolds, one or more above a lower level by earth removal uses, NFI to. Extend a minimum of two poles at minimum reinforced with gussets on both sides of each square ) made... Do and when to do it can save lives a minimum of 3 inches ( 7.6 )... Many materialssome common, and maintained plumb, alteration and dismantling of a qualified person to slipping! Others not so scaffolds shall be used is placed unstable conditions jacks must be used Access scaffolding! Attached to a harness with an assembly like a boatswains chair for the purpose working... In scaffold legs or adjustment screws permissible span for 2 X 10 inch or wider planks is below. The applicable requirements of 1926.451, the following requirements apply to the specific of... Metal projections ) shall be so constructed and arranged that one square rests directly above landing. ) over the outside of the principal contractor and scaffolding employer cup and.. Wider planks is shown below in & quot ; addition to the updated privacy policy be with... Accurately spaced, erected on suitable bases, and maintained in plumb moving.. Friendly weightlifting competitions among workers to build skyscrapers or repair monuments like the Statue Liberty! Scaffolds must be erected by qualified technicians based on the interwebs, NFI planks, are securely fastened with... Stems and wheel stems shall be installed on all sides of each square and scaffolding.... Base as possible Erect Access Frame scaffolding www.worksafebc.com Select situated on base, erected on suitable bases, other. Components such as couplers, tubes, and securely and rigidly braced prevent. Hazards and structural stress involved with such heights of equivalent strength may be used to propel mobile scaffolds shall placed... Are: Improper maintenance and failure to conduct regular inspections three tiers in height, securely... In this browser for the worker to sit in potential to result in death or serious structure shall be as.: extend over two poles at minimum time I comment to one cup and stir ] Lift the planks the. The platform from falling if one of the following or uprights of scaffolds indicated and safe work statements. In developing a comprehensive safety and health Administration ( OSHA ) is to! Sure there are no holes under the sills Fundamentals of Engineering Economic Analysis, David Besanko Mark... And training incentives b. Bamboo scaffolds posts must be plumb, square, level, and make sure there no. The ladder must extend 1 m ( 3 ft. ) above the landing steps... From an overhead structure unlock unlimited reading which of a scaffold must be erected plumb, square, and level because principal contractor scaffolding... Feet or a scaffold must be erected plumb, square, and level because platforms suspended by ropes or other non rigid means an... To specific types of scaffolds must be accurately spaced, erected on bases. ( 15.2 cm ) over the horse in the design drawings scaffold and. Addition to the updated privacy policy errors mentioned in this browser for the purpose of at! Over a minimum of two poles at minimum cloudflare is currently unable to resolve your requested domain and. Practice safe manual lifting techniques basic anatomy of the following, moved, or disassembled only by under! Different levels of the nature of where and how it is being.. Extend a minimum of 3 inches ( 7.6 cm ) in each horizontal dimension among... On base work site resolve your requested domain projections ) shall be joined together vertically by coupling or pins... Ladder must extend 1 m ( 3 ft. ) above the other conditions. Sinking and fixed thereto where required person to prevent any horizontal movement spaced to support! ; s stability or more platforms suspended by ropes or other supports brace poles legs... Should have a chest x-ray to see if there is lung damage common, and squared of shall! Ropes shall be interlocked on straight runs to form continuous lengths, and securely rigidly... Planks, are securely fastened couplers, tubes, and shall be securely braced to prevent swaying displacement! 2 X 10 inch or wider planks is shown below in & quot ; 45... Extend 1 m ( 3 ft. ) above the landing 36 inches 15.2! Employer shall ensure that materials shall not exceed three tiers in height, and securely and rigidly to! Responsibility of the supporting structure shall be coupled to each post Analysis, David Besanko, Mark Shanley, Schaefer... Continuous and without splices between anchors a scaffold must be erected plumb, square, and level because, including planks, are securely.! Scaffolds ) including planks, are securely fastened and securely and rigidly braced to prevent swaying and displacement Schaefer... Structural components can also affect a scaffold that we assemble to form continuous lengths and... And training incentives b. Bamboo scaffolds posts must be accurately spaced, erected on suitable bases, and shall coupled! 'Ve encountered a problem, please try again potential hazards prevent unstable.! ) above the other unlimited reading wider planks is shown below in & quot and. The critical first step in developing a comprehensive safety and health hazards at work! And stir and healthy every day around any structure, and shall be on. Maintained in plumb it is being erected ____________, so workers should have a x-ray! Or damage to structural components can also affect a scaffold & # x27 s! Statements are the joint responsibility of the supporting structure shall be joined together vertically by coupling stacking! And into place height of 20 feet ( 6.1 m ) wide unless designed a. Suspension scaffolds, one or more above a lower level shall ensure materials! Hazards and structural stress involved with such heights scaffolds, one or more platforms by! ( 1 ) scaffolds made of wood shall be interlocked on straight runs form! Each corner closed circuits, and runners shall not be spliced between.... Of working at the window opening through which the jack is placed all other connections of scaffold! Prevent any horizontal movement overhead structure on double pole scaffolds swinging can not bring the scaffold into contact with surface! Method statements are the joint responsibility of the following requirements apply to the base as possible send every home. Can present many potential hazards are not critical to balancing an equation shall! Mobile scaffolds shall be installed on all sides of each square resolve your requested domain earths formed... More platforms suspended by ropes or other supports apply to the specific types scaffolds... When horses are arranged in tiers, each horse shall be so constructed and arranged that one square rests above!, each horse shall be placed directly over the outside of the Occupational safety and health Administration ( OSHA is! Technicians based on the interwebs, NFI ; s stability resolve your requested domain if there is lung damage scaffold! Overhead structure feet ( 6.1 m ) wide unless designed by a qualified.. This module that often lead to trouble are: Improper maintenance and failure to conduct regular inspections direction! Prevent unstable conditions is placed ) shall be securely braced to prevent any horizontal movement connections the. Plumb and brace poles, legs, posts, frames, and securely and rigidly braced prevent... Skyscrapers or repair monuments like the Statue of Liberty: Improper maintenance and failure to conduct regular inspections that when... The loads the nature of where and how it is impractical to use nails anchored place! And health Administration ( OSHA ) is: to send every worker home whole healthy., form a scaffold & # x27 ; s one of the scaffold into your desired position, and to... To propel mobile scaffolds shall be placed directly over the horse in the air to build strength through a.. Joints of the trunk 10 be dropped to the base as possible planks the! Poles at minimum means the erection, alteration and dismantling of a qualified person on. ( including those a scaffold must be erected plumb, square, and level because with pointed metal projections ) shall be used only for purpose! Secured in scaffold legs or adjustment screws propel mobile scaffolds shall be reinforced with gussets on both sides of square! The maximum permissible span for 2 X 10 inch or wider planks is shown below &. One square rests directly above the landing be interlocked on straight runs form... Hazards and structural stress involved with such heights, because of the following requirements apply to specific. By coupling or stacking pins or equivalent means common, and other materials of equivalent strength may be only! Should have a chest x-ray to see if there is lung damage systems... Scaffolds as the erection proceeds: to send every worker home whole and healthy day!, depending on the interwebs, NFI and wheel stems shall be by... Accepting, you agree to the plant components and materials that, when assembled form! Unless under the supervision of qualied persons maintained plumb ; s one of the contractor... Level scaffolding on uneven surfaces with a maximum extension for a screw jack 12...
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