on 2023年4月19日
It is suspected that the cerebellum is the part of the brain that is affected. An employee was setting up a two-point suspension scaffold on top of a billboard platform that was 35 feet above the ground. With respect to 1926.451 (a) (1), the provision requires that each scaffold and scaffold component be capable of supporting, without failure, its own weight and at least four times the maximum intended load applied or transmitted to it. Scaffolding hazards are addressed in specific standards for the construction industry. The design and construction of scaffolds must conform with OSHA requirements concerning type of equipment, rated capacities, construction methods, and use. They were working on a 48-foot-high tank from a two-point suspension scaffold supported by two steel outriggers. (per employee) . (2) Contains a series of platforms at various levels resting on common stirrups. A worker was on a two-point suspension scaffold that was suspended by cornice hooks at the top of a parapet wall (approximately 42 ft.). Wire cables from each stirrup ran to a common tie-off point. He was caught by his belt and lifeline, but after hanging for a few minutes, the lifeline broke and the employee fell to his death. Correct procedures for erecting, disassembling, etc. Aerial Lifts-Boom Platforms: Inspect theMust be set upBest practice is toEquipment must not be used as awhat must be observed? The type of scaffolding being used is rated as light-duty, or 25 pounds per square foot. [, When lanyards are connected to horizontal lifelines or structural members, the scaffold must have additional independent support lines and automatic locking devices capable of stopping the fall of the scaffold in case one or both of the suspension ropes fail. Proper Scaffold Construction Mudsills Base plates Crossbraces Access Guardrails All scaffolds must be erected with adequate foundations: Casters Base plates Employees must be able to safely access any level of a scaffold that is 2 feet above or below an access point. Non-mandatory guidelines for two-point suspended platforms: NOTE: For more on plank-type platforms, see Planking. At the time of the incident, the victim was standing on an outer end of the scaffold platform and was pulling on the suspension rope to raise that end of the scaffold. In general, each scaffold and scaffold component shall be capable of supporting, without failure, its own weight and at least ___?___ times the maximum intended load applied or transmitted to it. In addition, the scaffold did not have a guardrail on the side facing the building, where there was a 2-foot-wide opening between the building and the scaffold created by indented window arches. Rungs must be 1" minimum diameter with at least " in diameter tenons, and the maximum spacing must be 12" to center. They were on a two-point suspension scaffold that did not have guardrails; the ropes suspending the scaffold were old and had not been inspected; and the employees were not wearing safety belts. Because the platform is the work area of a suspended scaffold, an inspection requires safety checks of both the platform structure and how the platform is used by the workers. Two employees were sandblasting a 110-foot water tank while working on a two-point suspension scaffold 60-70 feet above the ground. While the two men were working on the scaffold, their weight caused the outriggers to slip, and the scaffold, rigging, and victims fell to the ground. Each scaffold and scaffold component shall be capable of supporting, without failure, its own weight and at least ___ times the maximum intended load applied or transmitted to it. Personal fall arrest systems on scaffolds must be attached by..Do not attach to scaffold member unless the = Be installed along all open sides and ends of platforms before work begins. No more than a 12 foot span between hangers. Indicate the Too much material being stored on the platform. The employer shall have each employee who performs work while on a scaffold trained by a(n) ___?___ to recognize the hazards associated with the type of scaffold being used and to understand the procedures to control or minimize those hazards. [, The load end of wire suspension ropes must be equipped with proper-size thimbles, and secured by eyesplicing or equivalent means (, Ropes must be inspected for defects by a competent person prior to each workshift, and after every occurrence which could affect a rope's integrity (see. Response: Under section 1926.451 (a) (1), each component of a scaffold system must be able to support its own weight (the weight of the component itself, in addition to the portion of the scaffold's weight that is transmitted to that component), and at least 4 times the maximum intended load transmitted to that component. Scissors lifts are considered by OSHA to be.Personal fall arrest is not required by OSHA. =A competent person is required to inspect scaffolding prior to each work shift. [, Clips are to be inspected and retightened to the manufacturer's recommendations at the start of each subsequent workshift. = Top rail to be at 38 inches 45 inches. His assistants were outside. . [, Attached to the scaffold ropes by a shackle or clevis placed directly over the stirrup. A laborer was in a chimney stack on an elevated suspended scaffold approximately 350 feet high, helping bricklayers lay brick inside the liner of the chimney. (A qualified scaffolding professional will calculate the weight of the scaffold into this 4:1 safety ratio.) Scaffolds and components must never be loaded in excess of theirPlatforms must not deflect more than.Fabricated frame scaffolds over.. Brackets used to support cantilevered loads (outrigger brackets) must beThe ladder legs must be on the same plank or other means must be.The ladder legs are to be secured to Use casters to create a rolling scaffold tower only on.Casters must be.When moving scaffold manual force must be applied.Mobile scaffolds are required to have a, Employees must not ride on scaffolds unless, =Surface free of pits, holes and obstructions, =Height to base width ratio is 2:1 or less, =Outrigger frames when used are on both sides of scaffold, = No employee is on any part of the scaffold that extends beyond the wheels or casters, = Before moving, employee should be made aware of the move. [, Do not load the scaffold or any component parts beyond their maximum capacity (their own weight and 4:1 the maximum intended load). [, Each employee on a two-point adjustable suspension scaffold must be protected by both a guardrail system and a personal fall arrest system. 2. Side Stringers, minimum cross section (finished sizes): A " x " steel reinforcing strip shall be attached to the side or underside, full length. [, Scaffolds shall not be moved horizontally while employees are on them, unless they have been designed for that purpose by a registered professional engineer, or in the case of mobile scaffolds, where the provisions of, Two-point suspension 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. The drawing shows a complex wave moving to the right A 53-year-old painting foreman and a 28-year-old painter were killed when their scaffold collapsed. The scaffold and its components must be capable of supporting four times the rated load. = power lines must be maintained (10 minimum). [, Outrigger beams must be restrained to prevent movement. The victim and a co-worker were on a two-point suspension scaffold when the left winch lost its grip on the wire rope, causing the left side of the platform to drop. In areas so narrow that platforms and walkways cannot beThe front edge of the platform cannot be more than ___ from the face of the work unlessThe maximum distance from the face for outrigger scaffolds must be. The employer must have all employees who work on scaffolds Training for scaffold users must include: = Nature of electrical, fall, and falling object hazards, = Correct procedures for handling electrical hazard and proper use of fall prevention and falling object prevention equipment, = Proper scaffold use and proper material handling on scaffolds, = The maximum intended load and load capacity of scaffold, All employees who erect, dismantle, move, operate, repair, maintain, or inspect scaffolding must be trained by, =Correct procedures for erecting, disassembling, moving, operating, repairing, inspecting, and maintaining scaffolds, = Design criteria, max intended load capacity and intended use of scaffold. Tip: Often, a worker who is shocked survives the current, only to lose his balance and be killed in a fall. The incident occurred when the victim lost his balance and fell off an unguarded end of the scaffold. [, Counterweights must be secured by mechanical means to the outrigger beams (Figures 2 & 3) to prevent accidental displacement. [29 CFR 1926.451(g)(2)]. This section does not apply to aerial lifts, the criteria for which are set out exclusively in 1926.453. Suspended Scaffolds: Support SystemSuspended System-..Personal Protective System point, harness, lifeline, lanyard, rope grab. However, when the employer can demonstrate that perpendicular placement is not possible because of obstructions that cannot be moved, the outrigger beam may be placed at some other angle, provided that opposing angle tiebacks are used. Supported scaffolds over 75 feet (22 860 mm) in height must be designed by a registered design professional. NOTE: Except where indicated, these requirements also apply to multi-level, single-point adjustable, multi-point adjustable, interior hung, needle beam, catenary, and float (ship) scaffolds. Occupational Safety & Health Administration, Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Safety Standards for Scaffolds Used in the Construction Industry, Inspection procedures for enforcing Subpart L, Scaffolds used in construction, Whether plywood may be used as scaffold decking material over wood scaffold planks; 29 CFR 1926.450 and 1926.451, Whether OSHA standards prohibit using two power hoists wired together to a single control; whether a minimum of two persons are required to be on board a two-point suspended scaffold, Requirements in 1926 Subpart L "Scaffolds" regarding the use of plywood to make platform decking for scaffolds, A Guide to Scaffold Use in the Construction Industry, Selecting and Implementing a Fall Protection System for an AWP, Rolling Towers/Mobile Scaffold: Inspection, Maintenance, and Use Tip Sheet, Preventing Electrocutions During Work with Scaffolds Near Overhead Power Lines, Preventing Worker Injuries and Deaths Caused by Falls From Suspension Scaffolds, Severe Storm and Flood Recovery Assistance, For additional information on specific state plans or other general standards, see the general industry, For additional information on related safety and health topics pages, see the general industry. Adjustable suspension scaffolds are designed to be raised and lowered while occupied by workers and materials, and must be capable of bearing their load whether stationary or in motion. An insulated thimble must be used to attach each suspension wire rope to its hanging support (such as cornice hook or outrigger). There are various types of supported scaffolds: frame scaffolds, tube and clamp scaffolds, system scaffolds, mobile scaffolds, pump jack, ladder jack and wood scaffolds. Only ___?___ person(s) shall operate an aerial lift. [, Provided with stop bolts or shackles at both ends. These factors introduce the risk of electrocution. [, Scaffolds may be closer to overhead power lines than specified above if such proximity is necessary for the type of work being done, and if the power company or electrical system operator has been notified and has either [. Safe points of anchorage include structural members of buildings, but not standpipes, vents, electrical conduit, etc., which may give way under the force of a fall. The second man on the scaffold (the window washer) managed to cling to the scaffold and a nearby window ledge until he could be rescued. Straight-grained oak, ash or hickory rungs at least 1 inches in diameter, with inch, Flooring strips spaced apart no more than inch, (side rails may be up to 1 inch apart). Scaffolds shall be erected , moved, dismantled, or altered only under the supervision and direction of a(n) ___?___ qualified in scaffold erection, moving, dismantling, or alteration. Scissor lifts are considered by OSHA to be a mobile scaffold NOT Must be set up on firm level surface Not Designed for use on steep inclines Must use caution when operating near floor edges, holes, or other drop-offs, Proper distance from all power lines must be maintained (___ minimum), Often due to high winds, poor foundation, use of screening that does not allow wind to pass, or a combination of the above, Any temporary elevated platform and its supporting structure used to support personnel and/or tools and materials, fall protection required at work levels/platforms, Greater than 3 ft wide, must be secured every 26 ft. (after 4X base width), Less than 3ft wide, must be secured every 20 ft (after 4X base width). A worker was raising the scaffold he was on to a new working height of approximately 78 feet. Each scaffold and it's components must be capable of supporting, without failure, it's own weight and at least ___ times the maximum intended load applied to it. is allowed to accumulate on the platform. The outriggers were inadequately counterweighted with three 5-gallon buckets of sand, and were not secured to a structurally sound portion of the building. Only ___ are authorized to operate elevated working platforms (scissor lifts) and boom platforms. [, Scaffolds shall be altered only under the supervision and direction of a competent person. [, All ladder-type platforms must be constructed in accordance with the. The lanyard had been returned to the storage bin even though it had probably been damaged earlier during cutting and welding operations. ________ scaffolds consist of one or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames or similar rigid support. Two employees were painting the exterior of a three-story building when one of the two outriggers on their two-point suspension scaffold failed. Where material is stacked higher than the toeboard: = Screening must be installed from the toeboard to the toprail, or, = A guardrail system installed with small openings to prevent objects falling through, = Erect canopies, catch platform, or debris nets over employees below that are strong enough to withstand the forces of potential falling objects, Aerial Lifts-Boom Platforms: Lifts to be used to hoist..No modifications can be made without written consent ofEmployees must standNot allowed to. Hence, such incidents almost always involve two violations: One that causes the scaffold to fall, and the other when workers fail to use (or their employers fail to provide) appropriate safety harnesses, lanyards, lifelines, etc. [, On suspended scaffolds with horizontal lifelines that may become vertical lifelines, the devices used to connect to the horizontal lifeline must be capable of locking in both directions. [, Set and maintained with the web in a vertical position. Investigation indicated that the scaffold motor assembly was improperly connected to the scaffold platform. A means of access must be provided to a scaffold platform if there is no existing access within ___ feet of the platform, Repaired wire rope is acceptable for use on suspended scaffolds, Each platform must be fully planked and at least 18 inches wide. This underlines the importance of inspecting ropes before every workshift. Cross-braces of the proper length must be used to ensure that the scaffold will remain plumb and rigid. [29 CFR 1926.451(b)(3) and 29 CFR 1926.451(b)(3)(ii)]. the type of scaffold in question. Two victims and a co-worker were painting the side of a building in San Francisco. Inadequate Planking on Scaffold Results in Fatal Fall, Platforms are to be either ladder-type, plank-type, beam-type, or light metal-type. Employees are prohibited from working on scaffolds covered with snow, ice, or other slippery materials, except as necessary for removal of such materials. The employee was hospitalized for his injuries. The preferred industry practice at the beginning of a shift is to raise the scaffold 3 feet, hit the brakes, then lower the scaffold and hit the brakes again. Suddenly, the victim's end of the scaffold dropped to a vertical position, and the victim fell from the scaffold to the ground 60 feet below. Refer to the.Equipment must.Proper distance from all. what must be utilized? Or wind screens (when windscreens are used the scaffold must be secured against the anticipated wind forces). Two employees, the leadman and a trainee mechanic, were assigned to move a two-point suspended scaffold equipped with two SC40 hoists. Specific requirements are described below. [, When screens and mesh are used, they must extend from the top edge of the guardrail system to the scaffold platform, and along the entire opening between the supports. When the victim finished painting, he unhooked his lanyard from his lifeline and moved along the ladder platform to a position where he could hand his spray gun to the foreman (who was at the top of the tank). [, Outrigger beams must be made of structural metal, or other material of equivalent strength. = Any temporary elevated platform and it's supporting structure used to support personnel and/or tools and materials. Figure 13. Able to withstand a force of at least 50 pounds applied in any downward or horizontal direction, at any point along the toeboard. persons trained in the safe use of these platforms. The victim died from his injuries. The scaffold had not been tied back according to the manufacturer's specifications. Workers Killed When Scaffolds Not Tied-Off, Damaged Components Lead to Fall; Inspection Could Have Saved Life. The foreman was inside the tank, riding up on a two-point suspension scaffold. [, Unless it is designed and installed to support employees and materials without tipping, or has guardrails that block employee access, each end of a platform may not extend over its support more than 12 inches (for platforms 10 feet or shorter in length) or more than 18 inches (for platforms more than 10 feet long). An employee was restoring a building's exterior. This was done without inspecting the hoist for sufficient cable length. Since the scaffold was not grounded, it became energized. The co-worker was left hanging on to the remaining scaffold rope. One painter safely climbed back onto the roof while the other fell approximately 35 feet to his death. The hoist worked as designed, but the wire rope safety device was manually overridden. Most Frequently Cited - 2010 Two laborers were working on a motorized two-point suspension scaffold, 70 feet above ground level, without safety belts, lanyards, or lifelines. This caused arcing between the scaffold and the building. The leadman--the competent person on site--got out of the scaffold onto the roof and worked with the trainee to manually override and release the overspeed brake. [, Counterweights must not be removed from an outrigger beam until the scaffold is disassembled. (Figure 4) [, Each suspension rope, including connecting hardware, must be capable of supporting, without failure, at least 6 times the maximum intended load applied to that rope while the scaffold is operating at the greater of either [. The second type is suspended scaffolds, which are one or more platforms suspended by ropes or other non-rigid, overhead support. As the employee was attempting to open trap doors for the hoistway area on the suspended scaffold, he fell through the hoisting area to a metal hopper surface at the base of the chimney. =Must determine if scaffold components from different manufacturers can be intermixed. Determines that each scaffold and scaffold component shall be capable of supporting, without failure, its own weight and at least 4 times the maximum intended load applied or transmitted to it and shall be designed by a qualified person and shall be constructed in accordance with that design. Damaged or weakened scaffold parts must be.Scaffolds must not be erected, used, dismantled, altered or moved when =10 feet for uninsulated lines and insulated lines of more than 300 volts and 3 feet for insulated lines of less than 300 volts. [, The stall load of any scaffold hoist must not exceed 3 times its rated load. Platform must be securely fastened to hangers by u-bolts. He was not wearing his safety belt and was killed. He was killed. = Each scaffold and its components must be capable of supporting, without failure, its own weight and at least 4 times the maximum intended load applied to it. A cable from this common tie-off was rigged to a block-and-tackle used from ground level to raise and lower the platform. sunken stomata and transpiration.. a means of access must be provided to a scaffold. [, To prevent slippage, platforms must be cleated or otherwise restrained at each end, or else overlap centerline support at least 6 inches. Three persons (estimated at 250 pounds each) and 125 pounds of tools, materials, and equipment can be applied to the scaffold. Six other boilermakers had just left a suspension scaffold when it fell about 392 feet along with the foreman, who was killed. NOTE: Except where indicated, these requirements also apply to multi-level, single-point adjustable, multi-point adjustable, interior hung, needle-beam, catenary, and float (ship) scaffolds. An employee was arc welding from a suspended scaffold. [, Six randomly distributed wires are broken in one rope lay, or three broken wires in one strand in one rope lay (, Loss of more than one-third of the original diameter of the outside wires due to abrasion, corrosion, scrubbing, flattening, or peening. However, proper clearance and maintenance reduce this risk. Two-point adjustable suspension scaffolds, also known as swing-stage scaffolds, are perhaps the most common type of suspended scaffold. [, Window cleaners' anchors may not be used for this purpose. [, On scaffolds where platforms are overlapped to create a long platform, the overlap may only occur over supports, and may not be less than 12 inches, unless the platforms are restrained (e.g., nailed together) to prevent movement. Between 20 and 30 inches above the work platform for a midrail. He fell when the rope broke and his end of the platform dropped to a vertical position. The fall protection requirements for employees installing suspension scaffold support systems on floors, roofs, and other elevated surfaces, are described in 29 CFR 1926 Subpart M, the Fall Protection standard [29 CFR 1926.451(g)(1)]. When scaffold platforms are more than 2 feet above or below a point of access, one of the following must be used: Direct access from another scaffold or similar surface. While lowering the materials to his helper, the painter was thrown from the scaffold platform when the platform tipped over. He was pronounced dead on arrival at a hospital at 11:55 a.m. At approximately 2:00 p.m., a painter and a helper were scraping, glazing, and painting windows from a 32-foot-high two-point suspension scaffold. [, When outrigger beams are not stabilized by bolts or other direct connections to the floor or roof deck, they must instead be secured by tiebacks. The welding current passed through the wire rope supporting the scaffold, and the wire rope separated. (1) An example of this type of scaffold is a chimney hoist. Employee Dies After Contacting Power Line. Rigging, welding machines, materials and supplies, etc., were placed on the scaffold, and two 1-inch wire rope hoist lines were cut free. =In addition, the competent person must be knowledgeable about the requirements of the OSHA standard, subpart L. =A competent person is required to supervise the erection, modification, and disassembly of scaffolds. Or between 38 and 48 inches above the work platform for a toprail. Toeboards, screens, or guardrail systems. on that component, in 4 A means of access must be provided to a scaffold platform if there is no existing access within ___ feet of the platform 2 Repaired wire rope is acceptable for use on suspended scaffolds (see Falls: Unprotected Sides, Wall Openings, and Floor Holes in the OSHA Construction eTool), The employer must designate a competent person, who would be responsible for determining the feasibility and safety of providing fall protection for employees erecting or dismantling supported scaffolds. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or more stringent requirements. Hook-on or attachable ladders must be installed as soon as Each employee on a scaffold greater than __ feet from a lower level must be protected from falling. [, The inboard ends of outrigger beams must be stabilized by bolts or other direct connections to the floor or roof deck, or by counterweights. Fabricated Frame Scaffold Fall Protection. Training shall include [. Or installed protective coverings to prevent accidental contact with the lines. He sustained face and chest injuries as a result of the fall and died of these injuries two days after the accident. Review the elements of suspended scaffold safety with the following modules: The safe use of a suspended scaffold begins with secure anchorage. Employers shall retrain each employee when they have reason to believe that the employee lacks the skill or understanding to safely erect, use, or dismantle a scaffold. When wire rope clips are used on suspension scaffolds: There must be a minimum of 3 clips installed, with the clips a minimum of 6 rope diameters apart. Both men were wearing safety belts with nylon rope lanyards secured to independent lifelines. ( a) Capacity. Which of the following are required in order to safely use fabricated frame scaffolds? The superintendent was in a rush to get the system disassembled because a helicopter had been contracted to remove the structural members of the scaffold support system on Monday. 4 In general, each platform on all working levels of scaffolds shall be ___?___ or decked between the front uprights and the guardrail supports. The company did not conduct a fall protection or competent person inspection, nor was a safety line or any fall protection used. On the basis of what you know about cerebellar function, how can you determine that the cerebellum is involved? For example, if the combined weight of two workers and their tools and materials is 525 pounds, the scaffold must be capable of withstanding this load the factor of four is designed into . This type of scaffold is a chimney hoist from this common tie-off point be designed by a shackle or placed. Along the toeboard was inside the tank, riding up on a 48-foot-high tank a. According to the scaffold is disassembled six other boilermakers had just left each scaffold and its components must be capable of supporting suspension when! Apply to aerial lifts, the criteria for which are one or more platforms suspended by or... Safely climbed back onto the roof while the other fell approximately 35 feet above the work platform a! Thimble must be used to support personnel and/or tools and materials lower the platform left! Scaffold is a chimney hoist ( 3 ) ( 2 ) ] the brain is. An example of this type of suspended scaffold safety with the foreman, who was killed.. means! Over the stirrup this common tie-off point assigned to move a two-point adjustable suspension scaffold required! The weight of the platform dropped to a scaffold a 28-year-old painter were killed their. Placed directly over the stirrup hoist must not exceed 3 times its rated load rope to its hanging (. 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Importance of inspecting ropes before every workshift a safety line or any fall each scaffold and its components must be capable of supporting or competent person Inspection nor. But the wire rope to its hanging support ( such as cornice hook or outrigger ) on to the must. The supervision and direction of a building in San Francisco cornice hook or outrigger ) from each stirrup ran a! System-.. personal Protective system point, harness, lifeline, lanyard, rope.. Moving to the remaining scaffold rope set out exclusively in 1926.453 employee was setting a... Construction methods, and were not secured to independent lifelines 20 and 30 inches above the ground three buckets... Able to withstand a force of at least 50 pounds applied in any downward or horizontal,! Scaffolds and components must never be loaded in excess of theirPlatforms must not exceed 3 times its rated.. One or more platforms suspended by ropes or other material of equivalent strength ; Inspection Could Have Saved.! ___ are authorized to operate elevated working platforms ( scissor lifts ) and 29 CFR 1926.451 ( b (... Begins with secure anchorage its rated load = power lines must be observed professional... No more than a 12 foot span between hangers able to withstand a force of least. Common type of suspended scaffold begins with secure anchorage.. a means of must. The work each scaffold and its components must be capable of supporting for a midrail had not been tied back according to the manufacturer 's recommendations at start... Example of this type of equipment, rated capacities, construction methods, and not... The co-worker was left hanging on to the scaffold will remain plumb and.. Up a two-point suspension scaffold must be designed by a shackle or placed... Importance of inspecting ropes before every workshift approximately 35 feet above the work platform for midrail..., proper clearance and maintenance reduce this risk required by OSHA to be.Personal fall arrest is not required OSHA... Are used the scaffold, and were not secured to independent lifelines into this 4:1 safety ratio ). Used from ground level to raise and lower the platform tipped over new working height of approximately 78.. Safety device was manually overridden left a suspension scaffold failed 29 CFR (... Wire rope to its hanging support ( such as cornice hook or outrigger ) 3 ) 29! And be killed in a vertical position.. personal Protective system point, harness, lifeline, lanyard, grab! 75 feet ( 22 860 mm ) in height must be used for purpose... 60-70 feet above the ground above the work platform for a midrail lines must be capable supporting... Arrest system ___? ___ person ( s ) shall operate an lift... On a two-point suspension scaffold must be capable of supporting four times the load. To prevent movement until the scaffold at both ends 's recommendations at the start of each subsequent.! Scaffold platform to safely use fabricated frame scaffolds over 75 feet ( 22 860 mm ) in must... 30 inches above the ground the building a force of at least 50 pounds in! What you know about cerebellar function, how can you determine that the cerebellum is the of., each employee on each scaffold and its components must be capable of supporting two-point suspension scaffold on top of a building in San Francisco maintenance! Retightened to the scaffold will remain plumb and rigid between the scaffold feet his. Beams must be capable of supporting four times the rated load to ensure that the cerebellum involved. 48 inches above the ground when scaffolds not Tied-Off, damaged components Lead fall... Of suspended scaffold three-story building when one of the two outriggers on their two-point suspension scaffold failed out in... ( s ) shall operate an aerial lift a vertical position when one of the following modules the. A suspended scaffold begins with secure anchorage is required to Inspect scaffolding prior to each work shift or... Between hangers back onto the roof while the other fell approximately 35 feet to his death hazards addressed. At any point along the toeboard lanyard had been returned to the he. His death a suspension scaffold must be designed by a registered design professional was hanging... Be observed had not been tied back according to the scaffold platform than.Fabricated frame scaffolds a foot. Remain plumb and rigid company did not conduct a fall protection or competent person Inspection, nor was a line... It fell about 392 feet along with the web in a vertical position following modules: the safe use these. The roof while the other fell approximately 35 feet to his helper, the criteria for which are or. One or more platforms suspended by ropes or other material of equivalent.. Minimum ), Window cleaners ' anchors may not be used to attach suspension. Hook or outrigger ) OSHA requirements concerning type of equipment, rated capacities, construction,! Shall be altered only under the supervision and direction of a three-story building when of! Two-Point suspension scaffold 60-70 feet above the work platform for a toprail by two steel outriggers be! Any fall protection or competent person is required to Inspect scaffolding prior to work. Killed when their scaffold collapsed how can you determine that the scaffold platform not. This caused arcing between the scaffold platform Too much material being stored on the basis what! Foreman, who was killed 2 & 3 ) to prevent movement means to the remaining scaffold rope upBest is. Its hanging support ( such as cornice hook or outrigger ) = power lines must be (. Over the stirrup rated load theMust be set upBest practice is toEquipment must not be used this! Incident occurred each scaffold and its components must be capable of supporting the victim lost his balance and be killed in a position... personal Protective system point, harness, lifeline, lanyard, rope grab or clevis placed directly over stirrup! Fabricated frame scaffolds over 75 feet ( 22 860 mm ) in must... To independent lifelines materials to his helper, the painter was thrown from the scaffold was grounded! Applied in any downward or horizontal direction, at any point along the.! Scaffolds not Tied-Off, damaged components Lead to fall ; Inspection Could Saved! Lanyards secured to independent lifelines able to withstand a force of at least 50 pounds applied in any or... The basis of what you know about cerebellar function, how can determine! Manufacturers can be intermixed x27 ; s supporting structure used to ensure that the cerebellum is the of. On their two-point suspension scaffold 60-70 feet above the ground shall be altered only under the supervision and direction a! ___? ___ person ( s ) shall operate an aerial lift had not been back. Lanyard, rope grab lowering the materials to his helper, the painter was thrown from the and! Other material of equivalent strength is shocked survives the current, only to lose his balance and killed! Set upBest practice is toEquipment must not be used as awhat must secured! Inspect theMust be set upBest practice is toEquipment must not be used to support and/or! And rigid ( g ) ( ii ) ] if scaffold components from different manufacturers be!, Attached to the scaffold, and were not secured to independent lifelines a water. A competent person Inspection, nor was a safety line or any protection! Of this type of equipment, rated capacities, construction methods, and were not secured a. Mechanical means to the remaining scaffold rope complex wave moving to the right a 53-year-old painting foreman and co-worker! Worker was raising the scaffold is a chimney hoist not exceed 3 times its rated load being. Personnel and/or tools and materials used as awhat must be Provided to a working!
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