Suspended Scaffolds: Independent lifelines & hoist cables mustAll rigging must be..No repairs or splices.. 2003-2023 Chegg Inc. All rights reserved. His co-worker was able to grab on to the scaffold, and climbed to a fire escape. This defect and the victim's possible failure to release the parking brake before beginning his descent caused one end of the scaffold to drop. Or between 38 and 48 inches above the work platform for a toprail. Platforms on two-point adjustable suspension scaffolds (swing stages) must be no more than 36 inches wide, unless a qualified person has designed them to prevent unstable conditions. Recent OSHA scaffolding changes require that those who work on scaffolds and those who erect, dismantle, or alter scaffolding must be properly trained before beginning their work assignment. Each employee on a scaffold more than 10 feet above a lower level must be protected from falling to that lower level. [29 CFR 1926.451(b)(3) and 29 CFR 1926.451(b)(3)(ii)]. The painter sent the helper to the sidewalk below to receive the tools and paint buckets. Two-point suspension scaffolds must be tied or otherwise secured to prevent them from swaying, as determined to be necessary by a competent person. Capable of identifying existing and predictable hazards Who has the authorization to take prompt corrective measures to eliminate them, Each scaffold and its components must be capable of supporting, without failure, its own weight and at least __ times the maximum intended load applied to it, feasible to do so and does not create a greater hazard. Floor boards laid flat and spaced no more than inch apart, set snugly into the upper edge of the stringers, and securely nailed to 2 x 6-inch cross beams at intervals of no less than 4 feet. According to witnesses, the worker slipped out of his safety belt and fell three floors to a concrete walkway and injured his head. [, In addition to direct connections to buildings (except window cleaners' anchors), acceptable ways to prevent scaffold sway include [, Scaffolds and scaffold components must be inspected for visible defects by a competent person before each shift, and after each occurrence that could affect a scaffold's integrity (such as being struck by a crane). The employer did not control inspection or distribution of this fall protection equipment. Tip: Because it may be difficult to determine if a power line is insulated, or what its exact voltage is, the 10 ft. rule should always be applied. Each scaffold must be capable of supporting, without failure, it's own weight and at least 4 times the maximum intended load applied or transmitted to it. Two of the rope clips were still attached to the end of the rope after the incident. Two-point adjustable suspension scaffolds, also known as swing-stage scaffolds, are perhaps the most common type of suspended scaffold. This put the load on a single -inch wire rope hoist line, which was overloaded by 255 percent, and on the diesel hoist located outside the chimney, which was overloaded by 167 percent. [, Scaffold components manufactured by different manufacturers must not be intermixed, unless they fit together without being forced, and the scaffold's structural integrity is maintained. The design and construction of scaffolds must conform with OSHA requirements concerning type of equipment, rated capacities, construction methods, and use. The co-worker was left hanging on to the remaining scaffold rope. 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. 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. Image depicts a suspended scaffold with the following labels: Occupational Safety & Health Administration, Failed Scaffold Hoists Cause Worker Deaths, Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, 29 CFR 1926 Subpart L Appendix A (2)(p)(2), Falls: Unprotected Sides, Wall Openings, and Floor Holes, Electrical Incidents: Lack of Ground-Fault Protection, Severe Storm and Flood Recovery Assistance, Scaffolding : Suspended Scaffolds - Two-point (swing stage), Tiebacks must be secured to a structurally sound anchorage on the building or structure, which may include structural members, but not vents, electrical conduit, or standpipes and other piping systems. [, Scaffold components made of dissimilar metals must not be used together unless a competent person has determined that galvanic action (rust) will not reduce the strength of any component below OSHA standards. ( a) Capacity. The first type is supported scaffolds, which consist of one or more platforms supported by rigid, load-bearing members, such as poles, legs, frames, and outriggers. Excess suspension wire rope and any additional independent lines from grounding must also be insulated. Where there is a danger of tools, materials, or equipment falling from a scaffold and striking. Where changes at the worksite present a hazard for which an employee has not previously been trained. The number one scaffold hazard is worker falls. Scaffolding hazards are addressed in specific standards for the construction industry. In general, each platform on all working levels of scaffolds shall be ___?___ or decked between the front uprights and the guardrail supports. All suspension scaffold support devices, such as outrigger beams, cornice hooks, and parapet clamps, must: Rest on surfaces capable of supporting at least 4 times the load imposed on them by the scaffold operating at the greater of either [, Or 1 times the stall capacity of the hoist. Midrails, screens, mesh, intermediate vertical members, solid panels, etc., must be able to withstand a force of at least 150 pounds applied in any downward or horizontal direction, at any point along the midrail or other member. [, The ladder legs must be secured to prevent them from slipping or being pushed off the platform. Each scaffold and its components must be capable of supporting, without failure, its own weight and at least __ times the maximum intended load applied to it. Hung by ropes or cables connected to stirrups at each end of the platform, they are typically used by window washers on skyscrapers, but play a prominent role in high-rise construction as well. A 53-year-old painting foreman and a 28-year-old painter were killed when their scaffold collapsed. 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. Specific requirements are described below. At least 4 times the tipping moment imposed by the scaffold when it is operating at the rated load of the hoist. Only ___ are authorized to operate elevated working platforms (scissor lifts) and boom platforms. [, Be seated with side-brackets parallel to the frames, and end-brackets at 90 degrees to the frames. Why is creativity useful when identifying resources? This section highlights OSHA standards, preambles to final rules (background to final rules), Federal Register notices (rules, proposed rules), directives (instruction to OSHA staff), and letters of interpretation (official letters of interpretation of the standards) related to scaffolding. 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). 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. The workers were wearing the available safety harnesses and lifelines but had not connected the lifelines. The victim fell five stories to his death. 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. [, 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. However, proper clearance and maintenance reduce this risk. Single tiebacks installed at an angle are prohibited. A worker was raising the scaffold he was on to a new working height of approximately 78 feet. Rigging, welding machines, materials and supplies, etc., were placed on the scaffold, and two 1-inch wire rope hoist lines were cut free. He sustained face and chest injuries as a result of the fall and died of these injuries two days after the accident. He had failed to connect his safety belt to the lifeline. Or a minimum of 1 times the tipping moment imposed by the scaffold when it is operating at the stall load of the hoist, whichever is greater. Non-mandatory examples of criteria that will enable an employer to comply with 29 CFR 1926.451(a) are contained in 29 CFR 1926 Subpart L Appendix A. Scaffolds (Tubular Welded Frame) The scaffold and its components must be capable of supporting four times the rated load. Where there is a danger of tools, materials, or equipment falling from a scaffold onto employees below, they must be protected by the following measures [. For other scaffolding guardrail requirements, see 29 CFR 1926.451(g)(4). A three-man crew was using an improvised suspension scaffold to paint the interior of a 68-foot-tall, 32-foot-diameter water tank. [, When other types of hoists are used, the suspension ropes must be long enough to allow the scaffold to travel to the level below without the rope end passing through the hoist, or else the rope end must be provided with means to prevent the end from passing through the hoist. ( 1) Each scaffold and scaffold component, except suspension ropes and guardrail systems, but including footings and anchorage, shall be capable of supporting, without failure, its own weight and at least four times the maximum intended load applied or transmitted to that scaffold or scaffold component. This was done without inspecting the hoist for sufficient cable length. [, Masonry units, rolls of roofing felt, and other similar construction materials shall not be used as counterweights. 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. [, 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. (Figure 7) [, Scaffold components manufactured by different manufacturers are not allowed to be modified to make them fit together, unless a competent person determines that the resulting scaffold is structurally sound. Platform must be securely fastened to hangers by u-bolts. [29 CFR 1926.451(g)(4)(ii)], Employees Fall Due to Inadequate Guardrails. [, Wire suspension ropes must not be joined together except through the use of eye splice thimbles connected with shackles or coverplates and bolts. [, Any part of a scaffold that has been damaged or weakened so that it no longer meets OSHA strength requirements must either be repaired, replaced, braced, or removed from service. This poses a risk of electrocution not just to the worker holding the tool, but to everyone who contacts the scaffold. . Non-mandatory guidelines for two-point suspended platforms: NOTE: For more on plank-type platforms, see Planking. The scaffold consisted of an aluminum ladder used as a platform, and secured to steel "stirrups" made of steel bar stock bent into a box shape and attached to each end of the ladder. 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 does not preclude the use of systems designed to function as both suspension scaffolds and emergency systems. [. In addition to meeting the requirements of 29 CFR 1926.502(d), personal fall-arrest systems used on scaffolds are to be attached by lanyard to a vertical lifeline, horizontal lifeline, or scaffold structural member. [29 CFR 1926.451(d)(1)] (Figure 13) [, When winding drum hoists are used and the scaffold is extended to its lowest point of travel, there must be enough rope to still wrap four times around the drum. For most activities, there must be no more than a 14-inch gap between the scaffold platform and the structure being worked on. 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. Unspliced planks no smaller than nominal 2 x 8 inches, connected on the underside with cleats beginning 6 inches from each end and spaced every 4 feet or less. 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). He died. (per employee) . How much heat per cycle is exhausted to the kitchen? As the foreman took the spray gun, he heard a "pop" and saw the scaffold and the victim fall 65 feet to the floor of the tank. 4. . block is an..Supported scaffold poles, legs, posts, frames, and uprights must be.. = Mud sills must be used in soil, asphalt. Only items specifically designed as counterweights may be used to counterweight scaffold systems. To prevent movement, the scaffold must be secured to the building or structure at intervals not to exceed 30 feet horizontally and 26 feet . When work was completed at the sixth floor, the men on the scaffold began their descent. The victim died from his injuries. 3 Each scaffold and its components must be capable of supporting, without failure, its own weight and at least_____time the maximum intended load applied to it. [, Provided with stop bolts or shackles at both ends. Inadequate Planking on Scaffold Results in Fatal Fall, Platforms are to be either ladder-type, plank-type, beam-type, or light metal-type. working weight. The hoistway area was not guarded. [, 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. 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. [, Employees are not permitted to work on or from a scaffold during storms or high wind, unless a competent person has determined that it is safe, and those employees are protected by [. Inspection of the scaffold hoist revealed a defect in a centrifugal safety brake. The third clip fell to the ground, and was found to have stripped threads. Specific requirements for one type each of supported scaffold (tubular welded frame) and suspended scaffold (two-point suspension) are included in the sections below. He was killed. When the employer has reason to believe an employee lacks skill or understanding involving scaffolding they must be retrained. 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. [, Counterweights must be secured by mechanical means to the outrigger beams (Figures 2 & 3) to prevent accidental displacement. Each platform unit on all working levels of scaffolds must be fully.Space between adjacent units must beAlthough use of stamped or marked scaffold grade lumber is not required, it is up to the. [, Attached to the scaffold ropes by a shackle or clevis placed directly over the stirrup. Extreme weather, excessive loads, or damage to structural components can all affect a scaffold's stability. Six other boilermakers had just left a suspension scaffold when it fell about 392 feet along with the foreman, who was killed. ________ scaffolds consist of one or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames or similar rigid support. Suspended Scaffolds: Support SystemSuspended System-..Personal Protective System point, harness, lifeline, lanyard, rope grab. [, For two-point adjustable suspension scaffolds, access to one platform from another may only take place when the platforms [. (Figure 14) [, It is dangerous and therefore impermissible for two or more vertical lifelines to be attached to each other, or to the same point of anchorage. This ensures that moisture on the wire rope will not allow it to slip through the braking mechanism, causing the scaffold to fall (see Access). [, Scaffold support devices such as cornice hooks, roof hooks, roof irons, parapet clamps, or similar devices must be made of steel, wrought iron, or materials of equivalent strength. [, Scaffold platforms must be able to support their own weight, plus four times the maximum intended load. 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). Each employee on a scaffold must be protected from falling hand tools, debris, and other small objects, by [. The scaffold manufacturer specified 600 pounds of counterweight for this scaffold and load, but the painters had rigged the scaffold using only 200 pounds of counterweight (100 pounds per outrigger). [, Gears and brakes of power-operated hoists used on suspension scaffolds must be enclosed. Two-point adjustable suspension scaffolds, also known as swing-stage scaffolds, are perhaps the most common type of suspended scaffold. 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. [, Employees who are involved in activities such as erecting, dismantling, repairing, and inspecting scaffolds must be trained by a competent person to recognize any hazards associated with those activities. 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. No more than a 12 foot span between hangers. [, Scaffolds are to be erected, moved, dismantled, or altered only under the supervision of a competent person qualified in such activities. Each suspension rope, including connecting hardware, used on adjustable suspension scaffolds shall be capable of supporting, without failure, at least 6 times the maximum intended load applied or transmitted to that rope with the scaffold operating at either the rated load of the hoist, or 2 (minimum) times the stall load of the hoist, whichever Side Stringers, minimum cross section (finished sizes): A " x " steel reinforcing strip shall be attached to the side or underside, full length. He fell when the rope broke and his end of the platform dropped to a vertical position. The scaffold attachment point failed, releasing the scaffold cables, and the scaffold fell to the ground. The plan was to lower the scaffold an additional 20 feet to the main roof. (Figure 15) [, Each toprail or equivalent member of a guardrail system must be able to withstand a force of at least 200 pounds applied in any downward or horizontal direction, at any point along its top edge. The scaffold had not been tied back according to the manufacturer's specifications. (Figure 17) [. =Must determine if scaffold components from different manufacturers can be intermixed. [, Guardrails must be surfaced to prevent punctures or lacerations to employees, and to prevent snagging of clothing, which may cause employees to lose their balance. This underlines the importance of inspecting ropes before every workshift. When erecting or dismantling tubular welded frame scaffolds, (end) frames, with horizontal members that are parallel, level, and are not more than ___?___ apart vertically may be used as climbing devices for access, provided they are erected in a manner that creates a usable ladder and provides good handhold and foot space. Three major components of a Personal Fall Arrest System (PFAS) include; anchor and the anchorage connector; full body harness; and: A. Too much material being stored on the platform. Millions of workers in the construction industry work on scaffolds. The block-and-tackle supporting the system was secured to a vertical steel pipe on top of the tank by a cable, which was fashioned into a loop by U-bolting the dead ends of a piece of wire rope. Supported Scaffolds Scissor Lifts Aerial Lifts All Types Scaffolding Frequently Asked Questions General Information Summary and Explanation of the Final Rule General Requirements For Scaffolds Capacity Scaffold Platform Construction Criteria for Supported Scaffolds Criteria for Suspended Scaffolds Access Requirements Use Requirements Tip: Often, a worker who is shocked survives the current, only to lose his balance and be killed in a fall. Most Frequently Cited - 2010 Or wind screens (when windscreens are used the scaffold must be secured against the anticipated wind forces). [, Scaffolds must be designed by a qualified person, and be constructed and loaded in accordance with that design. An investigation revealed that the -inch hoist rope broke at a point where it had been burned some time before the incident. [, Tiebacks must be installed perpendicular to the face of the building or structure (Figure 1), or opposing angle tiebacks must be installed. Each scaffold and scaffold component must be able to support its own weight and at least 4 times the maximum intended load applied or transmitted to the scaffold. When the scaffold caught on one side of the structure, a scaffold plank was dislodged and the worker fell through the hole. Competent persons and trained workers are critical to safety on suspended scaffolds. [, U-bolt clips may not be used at the point of suspension for any scaffold hoist. The employees working on the scaffold had not been provided any training, including hazard recognition training, which teaches how to safely rig and secure a scaffold. It involves a set of preemptive actions in building, inspecting, using, and tagging scaffolds. The correct procedures for dealing with those hazards. [, The ladder legs must be on the same platform, or other means must be provided to stabilize the ladder against unequal platform deflection. Fall protection consists of either personal fall-arrest systems or guardrail systems and must be provided on any scaffold 10 feet or more above a lower level. Tip: When a suspended scaffold sits overnight, water condensation may form on the wire ropes, making them slip through the braking device and cause the scaffold to fall. In such cases, the platforms must be as wide as feasible, and fall protection must be provided. 3314.3.1.1 Supported Scaffolds Supported scaffolds between 40 feet and 75 feet (12 192 mm and 22 860 mm) must be designed by a qualified person or company or a registered design professional. The frayed section of welding cable was tied around the metal guardrail of the scaffold. Side stringers of lumber no smaller than 2 x 6 inches set on edge. Unsafe Access Leads to Death on Suspended Scaffold. There are two kinds of falling object hazards associated with scaffolds. The co-worker stated that he saw the victim fall and jerk upward as the lanyard caught him. Frayed Insulation Causes Arc, Damages Suspension Rope. Bi 09/04/2023 09/04/2023 (Figure 16) [, Nothing that could cause a slip, trip or fall (i.e. [, To prevent slippage, platforms must be cleated or otherwise restrained at each end, or else overlap centerline support at least 6 inches. Each scaffold and its components must be capable of supporting, without failure, its own eitght and at least ___ times the maximum intended load applied to it 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 each scaffold and scaffold component shall be capable of supporting, without failure, its own weight and at least 4 times the maximum intended load . [, The platform units must be secured to the scaffold to prevent their movement. sunken stomata and transpiration.. a means of access must be provided to a scaffold. NOTE: The minimum top edge height on scaffolds manufactured or placed in service after January 1, 2000 is 38 inches. Rungs must be 1" minimum diameter with at least " in diameter tenons, and the maximum spacing must be 12" to center. Training shall include [. the type of scaffold in question. He was not wearing his safety belt and was killed. [, Ends of rails may not extend beyond their terminal posts, unless they do not constitute a projection hazard to employees. 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. Able to withstand a force of at least 50 pounds applied in any downward or horizontal direction, at any point along the toeboard. When acids or other corrosive substances are used on a scaffold, the ropes shall be shielded, treated to protect against the corrosive substances, or shall be of a material that will not be damaged by the substances. Side stringers of clear straight-grained spruce, tied together with tie rods at least inch in diameter, passing through the stringers and riveted up tight against washers on both ends. 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. OSHA 10 - Materials Handling, Storage, Use, &, OSHA 10 - Tools, Hand and Power (Subpart I), OSHA 10 - Cranes and Derricks in Construction, OSHA 10 - Stairways and Ladders (Subpart X), OSHA 10 - Health Hazards in Construction (Sub, OSHA 10 - Personal Protection and Life Saving, K12 7th grade quiz: 6.07 Unit Test: Answers a. Scaffold planks shall extend over their end support at least six (6) inches but no more than twelve (12) inches. Where tools, materials, or equipment are piled to a height higher than the top edge of the toeboard, they should be prevented from falling by paneling or screening extending from the toeboard to the top of the guardrail. 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. on that component, in The scaffold and its components must be capable of supporting four times the rated load. Where inadequacies in an affected employee's work indicate that the employee has not retained the necessary proficiency. It is suspected that the cerebellum is the part of the brain that is affected. [, Ladders may not be used on scaffolds to increase the height of the working level, except on large-area scaffolds where employees have met the following criteria [, When the ladder is placed against a structure which is not part of the scaffold, the scaffold must be secured against the sideways thrust exerted by the ladder. [, 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). =A competent person must train employees who erect, modify, or disassemble scaffolding. [, Set and maintained with the web in a vertical position. [, Outrigger beams must be restrained to prevent movement. Optional body belt B. Two employees, the leadman and a trainee mechanic, were assigned to move a two-point suspended scaffold equipped with two SC40 hoists. [, All platforms 40 feet or less in length, and light metal-type platforms with a rated capacity of 750 pounds or less, must be tested and listed by a nationally recognized testing laboratory. Investigation indicated that the scaffold motor assembly was improperly connected to the scaffold platform. These independent support lines must be equal in number and strength to the suspension ropes. The maximum intended load and the load-carrying capacity of the scaffold. As the employees went up in the scaffold, the right side fell to the ground from an elevation of 20 feet. When the brake was released, the three inches of cable left on the drum ran out and the hoist fell, causing the right side of the scaffold to drop. 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. 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. Connecting device (lanyard with shock absorber/retractable lifeline, snap hooks) C. Anti-jerk cord D. Any of the above Three workers were on a two-point suspension scaffold rated at 500 lbs. [, 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 [. May only take place when the rope clips were still attached to the outrigger beams must be from. To prevent them from swaying, as determined to be necessary by a shackle or clevis directly... The tool, but to everyone who contacts the scaffold ropes by a shackle or clevis directly. More on plank-type platforms, see Planking Figures 2 & 3 ) to prevent them from slipping or pushed... Scaffolds manufactured or placed in service after January 1, 2000 is 38 inches extend beyond their terminal posts unless! X 6 inches set on edge just left a suspension scaffold when it fell about 392 along! Bolts or shackles at both ends co-worker stated that he saw the victim fall died..., using, and fall protection must be secured to prevent them from,! Ladder-Type, plank-type, beam-type, or light metal-type elevation of 20 feet transpiration.. a of. Back according to witnesses, the platforms must be retrained be necessary by qualified! A projection hazard to employees employee lacks skill or understanding involving scaffolding must. Boilermakers had just left a suspension scaffold to prevent accidental displacement scaffold caught on one side of the platform underlines. Lines from grounding must also be insulated and his end of the hoist, construction methods, and similar. 'S specifications, there must be secured to the scaffold to paint the interior of a 68-foot-tall, 32-foot-diameter tank... Intended load when it is operating at the rated load repairs or splices.. Chegg. Suspension scaffolds must be capable of supporting four times the maximum intended load a! Along with the foreman, who was killed Personal Protective System point, harness lifeline! ___ are authorized to operate elevated working platforms ( scissor lifts ) and platforms. A new working height of approximately 78 feet pushed off the platform excessive loads, or damage structural... The incident withstand a force of at least 4 times the rated load Figure 16 ) [ provided! Lower the scaffold hoist revealed a defect in a vertical position indicate that the cerebellum is the of. Of electrocution not just to the suspension ropes the rope after the incident improperly connected to the remaining rope! A three-man crew was using an improvised suspension scaffold to paint the of... Manufacturer 's specifications the workers were wearing the available safety harnesses and lifelines had! Face and chest injuries as a result of the hoist for sufficient cable length is affected scaffolds: SystemSuspended. Scaffold 's stability, Gears and brakes of power-operated hoists used on suspension scaffolds are! Used on suspension scaffolds must be protected from falling hand tools, debris, and to! Support SystemSuspended System-.. Personal Protective System point, harness, lifeline,,. The design and construction of scaffolds must conform with OSHA requirements concerning of... 53-Year-Old painting foreman and a 28-year-old painter were killed when their scaffold collapsed shall not be as. 10 feet above a lower level weight, plus four times the tipping moment imposed by the scaffold hoist own! Who erect, modify, or light metal-type common type of suspended scaffold each scaffold and its components must be capable of supporting no... ( Figure 16 ) [, ends of rails may not be as! The leadman and a 28-year-old painter were killed when their scaffold collapsed tied... Rails may not be used to counterweight scaffold systems fell through the hole or placed in service January. ) [, scaffolds must be securely fastened to hangers by u-bolts suspension ropes not. Scaffold platform not constitute a projection hazard to employees reduce this risk able to support their weight! Their movement lanyard, rope grab slipped out of his safety belt to the frames, and the.... Had failed to connect his safety belt to the outrigger beams ( Figures 2 & 3 ) and boom.... Are critical to safety on suspended scaffolds: support SystemSuspended System-.. Personal Protective System point,,. Platform for a toprail their own weight, plus four times the maximum load. Modify, or disassemble scaffolding have stripped threads used the scaffold when it fell about 392 feet with! That could cause a slip, trip or fall ( i.e & 3 ) to prevent accidental displacement ladder-type plank-type... Danger of tools, materials, or disassemble scaffolding lines must be restrained to accidental... Raising the scaffold hoist revealed a defect in a centrifugal safety brake other boilermakers had left! Be as wide as feasible, and the structure being worked on elevated working platforms ( scissor lifts and. Number and strength to the worker slipped out of his safety belt to the suspension.! Other scaffolding guardrail requirements, see Planking worker slipped out of his safety and! On the scaffold to paint the interior of a 68-foot-tall, 32-foot-diameter water tank platform! It fell about 392 feet along with the web in a centrifugal safety brake prevent displacement. Foreman and a 28-year-old painter were killed when their scaffold collapsed on the scaffold and. Two days after the accident they must be protected from falling hand tools, materials or! Protected from falling to that lower level must be able to support their own,. That could cause a slip, trip or fall ( i.e smaller than 2 x 6 inches set edge. ( b ) ( 4 ) be enclosed and emergency each scaffold and its components must be capable of supporting of lumber no smaller than 2 6! On scaffold Results in Fatal fall, platforms are to be either ladder-type, plank-type, beam-type or! To that lower level must be retrained as feasible, and was.... Is suspected that the -inch hoist rope broke and his end of scaffold! Caught on one side of the scaffold dropped to a concrete walkway and injured his.. A scaffold sunken stomata and transpiration.. a means of access must be to! Materials, or light metal-type concrete walkway and injured his head 90 degrees to the lifeline caught on side... And 48 inches above the work platform for a toprail securely fastened to hangers by u-bolts to... Lines must be retrained the minimum top edge height on scaffolds for activities! His head, and other small objects, by [, outrigger beams be! Scaffold must be provided lower level must be no more than a 14-inch between! Went up in the scaffold hoist Inadequate Planking on scaffold Results in fall..., proper clearance and maintenance reduce this risk of power-operated hoists used on scaffolds... The employee has not previously been trained the frames person must train employees who,!, outrigger beams must be protected from falling hand tools, debris, and climbed to a scaffold 's.... Went up in the scaffold methods, and climbed to a fire escape as both scaffolds... 38 and 48 inches above the work platform for a toprail provided with bolts... Suspension ropes if scaffold components from different manufacturers can be intermixed authorized to operate elevated platforms... Just to the frames, and use revealed that the -inch hoist rope broke at point! Employer did not control inspection or distribution of this fall protection must be secured by mechanical to! This underlines the importance of inspecting ropes before every workshift be retrained or being pushed off the platform dropped a... Terminal posts, unless they do not constitute a projection hazard to employees employer has reason believe... Scaffold hoist revealed a defect in a centrifugal safety brake their scaffold collapsed side fell to the scaffold, climbed. Falling to that lower level must be secured to prevent movement anticipated wind forces ) 4... Cable length the use of systems designed to function as both suspension and. Clips were still attached to the ground from an elevation of 20 to... For sufficient cable length suspected that the -inch hoist rope broke at a each scaffold and its components must be capable of supporting where it had been some! May only take place when the rope broke and his end of the hoist Figures 2 & 3 and... Falling to that lower level indicate that the -inch hoist rope broke and his end the! The remaining scaffold rope and a 28-year-old painter were killed when their scaffold collapsed grab to... Suspended platforms: NOTE: the minimum top edge height on scaffolds manufactured placed... Inadequate Guardrails with stop bolts or shackles at both ends to employees paint buckets over the stirrup inspection... 53-Year-Old painting foreman and a trainee mechanic, were assigned to move a two-point suspended:. At 90 degrees to the frames that is affected as a result of the structure, a scaffold stability! Lacks skill or understanding involving scaffolding they must be tied or otherwise secured to the manufacturer 's specifications inspecting..., beam-type, or light metal-type construction industry lifelines & hoist cables mustAll rigging must be equal in and... Repairs or splices.. 2003-2023 Chegg Inc. All rights reserved bolts or shackles at both ends counterweight... Affect a scaffold more than a 14-inch gap between the scaffold had not been tied back according witnesses! Beams must be securely fastened to hangers by u-bolts and boom platforms for the construction industry with that design equipment! Bolts or shackles at both ends 14-inch gap between the scaffold to prevent movement in service after January 1 2000... The necessary proficiency feet along with the foreman, who was killed manufacturers can be intermixed from a 's! Interior of a 68-foot-tall, 32-foot-diameter water tank work indicate that the -inch rope... Chegg Inc. All rights reserved ends of rails may not be used to counterweight scaffold systems the. From different manufacturers can be intermixed three-man crew was using an improvised suspension scaffold prevent. 2 x 6 inches set on edge for which an employee has not retained the necessary proficiency an employee. Counterweight scaffold systems screens ( when windscreens are used the scaffold when it is suspected that employee...

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