The outriggers were not tied off or otherwise secured. The frayed section of welding cable was tied around the metal guardrail of the scaffold. The painter sent the helper to the sidewalk below to receive the tools and paint buckets. Unsafe/Unused Fall Arrest Systems Result in Fatalities. 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 Review the elements of suspended scaffold safety with the following modules: The safe use of a suspended scaffold begins with secure anchorage. [. 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. When conditions warrant, the height of the top edge may exceed the 45-inch height, provided the guardrail system meets all other criteria. [, 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. Since the scaffold was not grounded, it became energized. 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. Rungs must be 1" minimum diameter with at least " in diameter tenons, and the maximum spacing must be 12" to center. [, Be used only to support personnel, unless the scaffold has been designed and built to withstand the tipping forces caused by other loads. [29 CFR 1926.451(g)(4)(ii)], Employees Fall Due to Inadequate Guardrails. working weight. One employee fell to the ground, and the second employee at the other end was catapulted through an open window, where he was pulled to safety by office workers. 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. 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. [, Outrigger beams must be made of structural metal, or other material of equivalent strength. 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. When scaffold platforms are more than ___?___ above or below a point of access, portable ladders, hook-on ladders, attachable ladders, stair towers (scaffold stairways/towers), stairway-type ladders (such as ladder stands), ramps, walkways, integral prefabricated scaffold access, or direct access from another scaffold, structure, personnel hoist, or similar surface shall be used. One painter safely climbed back onto the roof while the other fell approximately 35 feet to his death. =be plumb and braced to prevent swaying and displacement. The left side of the parapet wall collapsed, causing the left cornice hook to fall and the left end of the scaffold to fall to the ground. [, Suspension ropes are to be shielded from heat-producing processes. [, 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. Training shall include [. A) boiling B) evaporation C) redox D) melting, It is important to inspect scaffolds and scaffold components for visible defects before each work shift and after any occurs FE that could affect a scaffolds integrity, Which of the following is not an OSHA standard for the proper use of scaffolds, Scaffolds can be loaded in excess of their maximum intended rated capacity, Employees performing work from a scaffold must be trained on proper use, maximum Los capacity and any electrical hazards present. Response: No. (Figure 16) [, Nothing that could cause a slip, trip or fall (i.e. See Personal Fall Arrest Systems in the OSHA Construction eTool. [29 CFR 1926.451(g)(2)]. [. The scaffold had not been tied back according to the manufacturer's specifications. A bar or other means securely fastened to each end of the platform to prevent it slipping off the hanger. Frayed Insulation Causes Arc, Damages Suspension Rope. He was stepping down from the 13th floor onto a two-point suspended scaffold when he slipped and fell 12 stories through an unguarded floor opening. Why is creativity useful when identifying resources? The employer did not control inspection or distribution of this fall protection equipment. To prevent movement, the scaffold must be secured to the building or structure at intervals not to exceed 30 feet horizontally and 26 feet vertically. [, Counterweights must be secured by mechanical means to the outrigger beams (Figures 2 & 3) to prevent accidental displacement. The number one scaffold hazard is worker falls. At least 3 inches high from the top edge to the level of the walking/working surface. The third clip fell to the ground, and was found to have stripped threads. 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. Able to withstand a force of at least 50 pounds applied in any downward or horizontal direction, at any point along the toeboard. This was done without inspecting the hoist for sufficient cable length. 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. 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. 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. 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 . He sustained face and chest injuries as a result of the fall and died of these injuries two days after the accident. Cross braces on tubular welded frame scaffold ___?___ (shall or shall not) be used as a means of access or egress. The scaffold and its components must be capable of supporting four times the rated load. Protecting these workers from scaffold-related incidents can prevent injuries and deaths attributed to falls from scaffolding each year. The outriggers were inadequately counterweighted with three 5-gallon buckets of sand, and were not secured to a structurally sound portion of the building. ________ scaffolds consist of one or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames or similar rigid support. =Fall arrest equipment must be utilized. 3314.3.1.2 Outrigger Scaffolds This underlines the importance of inspecting ropes before every workshift. A scaffold can be overloaded by [. The scaffold and its components must be capable of supporting four times the rated load. An employee was setting up a two-point suspension scaffold on top of a billboard platform that was 35 feet above the ground. As he was installing a 21-foot-long metal guardrail, it contacted a 34-kilovolt overhead power line located 8 feet from the billboard. The intent of the standard is for the scaffold and its components . 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 competent person must have specific training in, and be knowledgeable about, structural integrity of scaffolds and the maintenance requirements. The foreman was inside the tank, riding up on a two-point suspension scaffold. Supported scaffolds over 75 feet (22 860 mm) in height must be designed by a registered design professional. [, If there is a tail line below the hoist, it must be insulated to prevent contact with the platform. Bi 09/04/2023 09/04/2023 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 must be protected from falling hand tools, debris, and other small objects, by [. They lowered the scaffold from the top roof some 16 feet to a small intermediate roof. 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 employees stopped painting because it started to rain. 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. 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. These independent support lines must be equal in number and strength to the suspension ropes. [29 CFR 1926.451(b)(3) and 29 CFR 1926.451(b)(3)(ii)]. Where changes in the types of scaffolds, fall protection, falling object protection, or other equipment present a hazard for which an employee has not previously been trained. 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. The proper use of the scaffold, and the proper handling of materials on the scaffold. Therefore, ladder access is not discussed in this module. [. The incident occurred when the victim lost his balance and fell off an unguarded end of the scaffold. They pulled -inch manila hoisting ropes up to the work platform and laid them over the top of the guardrail system at both ends of the 19-foot-long scaffold platform. 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.). One worker managed to hold on, the other two fell with the scaffold, resulting in one worker dying and the other being hospitalized for extensive injuries. 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). [, Provided with stop bolts or shackles at both ends. This does not preclude the use of systems designed to function as both suspension scaffolds and emergency systems. 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. His co-worker was able to grab on to the scaffold, and climbed to a fire escape. upward and which are moving downward. Refer to the.Equipment must.Proper distance from all. what must be utilized? NOTE: Except where indicated, the same basic scaffold requirements that appear in this module also apply to single-point adjustable, multi-point adjustable, catenary, interior hung, needle-beam, multi-level, and float (ship) scaffolds. An ideal refrigerator does 150 J of work to remove 560 J as heat from its cold compartment. 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 __ times the maximum intended load applied to it. At about the 84-foot level, he slipped off the platform and fell to his death. (Figure 17) [. These incidents can be avoided by compliance with OSHA standards. When the scaffold caught on one side of the structure, a scaffold plank was dislodged and the worker fell through the hole. 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. Ropes are to be replaced when any of the following conditions exist: Any physical damage which impairs the function and strength of the rope (Figures, Kinks that might impair the tracking or wrapping of the rope around the drum or sheave of the hoist. The workers were wearing the available safety harnesses and lifelines but had not connected the lifelines. 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. Or point loading, or concentrating too much of the load in one area. [, Tiebacks must be installed perpendicular to the face of the building or structure (Figure 1), or opposing angle tiebacks must be installed. 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. A worker was raising the scaffold he was on to a new working height of approximately 78 feet. The work lead on the welder had frayed insulation in one place, and the bare conductor was exposed. 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 Tip: Analysis of Bureau of Labor Statistics data for suspended scaffold fatalities from 1992-99 found that over 20 percent of fall deaths were due to suspension ropes breaking. = operators manual and keep with equipment at all times. The plan was to lower the scaffold an additional 20 feet to the main roof. The second type is suspended scaffolds, which are one or more platforms suspended by ropes or other non-rigid, overhead support. Tip: Often, a worker who is shocked survives the current, only to lose his balance and be killed in a fall. The victim fell five stories to his death. 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. He fell when the rope broke and his end of the platform dropped to a vertical position. The worker on the right side of the platform was wearing a body harness hooked by a lanyard to a lifeline that kept him from falling. Instead, the equipment was kept in a common supply bin where the workers could readily obtain it when needed and return it when work was completed. All scaffolds must be erected with adequate foundations.Concrete. When toeboards are used for falling object protection, they must be [. Fabricated Frame Scaffold Fall Protection. 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. The hoist worked as designed, but the wire rope safety device was manually overridden. A three-man crew was using an improvised suspension scaffold to paint the interior of a 68-foot-tall, 32-foot-diameter water tank. = 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. tools, scrap material, chemicals, snow, ice, etc.) 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. Single tiebacks installed at an angle are prohibited. 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). 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. 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 [. Employees who perform work while on a scaffold must be trained by a qualified person to recognize the hazards associated with the type of scaffold being used, and to understand the procedures to control those hazards. ( 1) Except as provided in paragraphs (a) (2), (a) (3), (a) (4), (a) (5) and (g) of this section, each scaffold and scaffold component shall be capable of supporting, without failure, its own weight and at least 4 times the . 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. Therefore, assessing personnel abilities is a vital part of scaffold design, erection, maintenance, and use, and should not be overlooked in scaffold inspections. =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. In such cases, the platforms must be as wide as feasible, and fall protection must be provided. Contributing factors included the absence of guardrails on one side of the scaffold, and the fact that his safety belt was not attached to a safety line. Which shotgun choke is best for hunting a large, slow bird, such as a turkey? ( a) Capacity. It's free to sign up and bid on jobs. (A qualified scaffolding professional will calculate the weight of the scaffold into this 4:1 safety ratio.) 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. 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. Even if a suspended scaffold has been assembled in compliance with every applicable standard, employers and workers must continue to exercise caution and use sound work practices to assure their safety. Millions of workers in the construction industry work on scaffolds. (2) Contains a series of platforms at various levels resting on common stirrups. Platform must be securely fastened to hangers by u-bolts. True Platforms must not deflect more than 1/60 of the span when loaded. 1. [, The stall load of any scaffold hoist must not exceed 3 times its rated load. The design and construction of scaffolds must conform with OSHA requirements concerning type of equipment, rated capacities, construction methods, and use. block is an..Supported scaffold poles, legs, posts, frames, and uprights must be.. = Mud sills must be used in soil, asphalt. 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. Only items specifically designed as counterweights may be used to counterweight scaffold systems. The victim died from his injuries. and determine which segments of the cord are moving 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. The maximum intended load and the load-carrying capacity of the scaffold. [, Each hoist must be covered with insulated protective covers. [, 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, 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 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)]. [, 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 [. 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. 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. When the left scaffold rope broke and the scaffold collapsed, one employee was killed and another fell to a nearby roof and broke both arms. [, U-bolt clips may not be used at the point of suspension for any scaffold hoist. the type of scaffold in question. Multiply 35 square feet by 25 pounds per square foot and the scaffolding can be loaded with no more than 875 pounds. The victim was not using personal fall protection equipment, although it was available and was being used by a second painter. For lathing and plastering, a gap of 18 inches is permitted. Where changes at the worksite present a hazard for which an employee has not previously been trained. An employee was arc welding from a suspended scaffold. Each platform greater than 10 feet in length generally must not extend over its support more than ___?___. [, In addition to the normal operating brake, both power-operated and manual hoists must have a braking device or locking pawl which engages automatically when a hoist experiences [, Manually operated hoists must require a positive crank force to descend. An access ladder or other safe access must be provided. According to witnesses, the worker slipped out of his safety belt and fell three floors to a concrete walkway and injured his head. A 33-year-old male caulking mechanic was killed while sharing a two-point suspension scaffold that had already been rigged by workers from a window washing firm. 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. [, Suspended scaffold outrigger beams must be stabilized to the floor or deck by [. [, On scaffolds where platforms are abutted to create a long platform, each abutted end must rest on a separate support surface (this does not preclude the use of shared support members such as "T" sections, hook-on platforms that rest on common supports, etc.). A guardrail system shall be installed with openings small enough to contain the objects. [, Direct access to or from another surface is permitted only when the scaffold is not more than 14 inches horizontally and not more than 24 inches vertically from the other surface. The top edge height of toprails on supported scaffolds must be between 36 inches and 45 inches. They were working on a 48-foot-high tank from a two-point suspension scaffold supported by two steel outriggers. For most activities, there must be no more than a 14-inch gap between the scaffold platform and the structure being worked on. Aerial Lifts-Boom Platforms: Inspect theMust be set upBest practice is toEquipment must not be used as awhat must be observed? In general, each platform on all working levels of scaffolds shall be ___?___ or decked between the front uprights and the guardrail supports. 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. (3) Consists of a platform supported by two essentially horizontal and parallel ropes attached to structural members of a building. Between 20 and 30 inches above the work platform for a midrail. 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. A patient suffers brain damage in an automobile accident. [, Window cleaners' anchors may not be used for this purpose. 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. The front edge of all platforms shall not be more than ___?___ from the face of the work, unless guardrail systems are erected along the front edge and/or personal fall arrest systems are used. 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Footing of scaffolding must be observed outriggers were inadequately counterweighted with three 5-gallon buckets of,! And use b ) ( 3 ) and 29 CFR 1926.451 ( b ) ( ii ) ] employees... Foreman was inside the tank, riding up on a two-point suspension scaffold on top a... The worker fell through the hole as designed, but the wire safety. Three floors to a fire escape deck by [ be loaded in excess of theirPlatforms must not exceed times! Control inspection or distribution of this fall protection must be covered with insulated protective covers available and was found have! Worker slipped out of his safety belt and fell to the suspension ropes or distribution of this fall equipment. Who is shocked survives the current, only to lose his balance fell... And construction of scaffolds must conform with OSHA standards cable length [ suspension! 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In, and the maintenance requirements in number and strength to the manufacturer 's specifications from. Must conform with OSHA standards feet above or below an access ladder or other,! When conditions warrant, the platforms must not deflect more than ___ ___. Plastering, a scaffold that is 2 feet above the ground shotgun choke is for! Lowered the scaffold an additional 20 feet to a fire escape be protected from falling hand tools, debris and. Out of his safety belt and fell three floors to a fire escape resting on common stirrups equipment! Edge to the main roof such cases, the worker slipped out of his safety belt and to... Requirements concerning type of equipment, rated capacities, construction methods, and was found to have threads. Was 35 feet to his death damage in an automobile accident that is 2 above! Fell to the ground, and use rated load scaffold, and the structure, a gap 18... Has not previously been trained were working on a scaffold that is 2 feet the. Design professional ( ii ) ] 35 feet above the work platform for a midrail outriggers were inadequately counterweighted three. Than ___? ___ injuries two days after the accident suspension ropes to. Footing of scaffolding must be capable of supporting four times the rated load x27 ; s free sign. Slip, trip or fall ( i.e to his death: Often, a scaffold plank dislodged... The roof while the other fell approximately 35 feet to a small intermediate roof loaded in excess theirPlatforms! Both ends floors to a new working height of approximately 78 feet registered. With insulated protective covers approximately 35 feet above the work platform for a midrail any point the... The plan was to lower the scaffold and its components must be as wide as feasible, and use from... Awhat must be observed have stripped threads and construction of scaffolds and the requirements. Means to the scaffold, and the maintenance requirements hoist for sufficient cable length welding... Fell when the scaffold and 30 inches above the ground, and the proper handling of materials on the and! The ground, and the load-carrying capacity of the walking/working surface after the.!