Except when used only as a walkway, the platform is the work area of the scaffold. Rolling interior and exterior scaffolding are referred to as mobile scaffold towers, and they are a type of scaffolding tower that have scaffolding casters attached to the end of all the scaffold legs on which they stand: these can be swiveled and moved around to be employed as work support in different locations without less need of dismantling and then reconstructing them. If the scaffold is built even a few degrees off plumb, the resulting instability could cause the weight of the scaffold to shift . For planks that are greater than 10 feet long, the maximum extension past the. Frames and panels should also be locked together to prevent uplift. Placement of potential falling objects away from the edge of the surface from which they may fall when the falling objects are too large, heavy or massive to be contained or deflected by any of the above-listed measures. [, 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. We are headquartered in Turlock, CA, with locations across the heart of Californias Central Valley and beyond to provide a local feel to the solutions and services we provide our clients. [, Scaffold platforms and walkways must be at least 18 inches wide, unless they are used in areas that the employer can demonstrate are so narrow that they must be less than 18 inches wide. (j) Scaffold planks must extend over their end supports not less than 6 inches nor more than 18 inches. shall be of such length as will automatically square and align vertical members so that the erected scaffold is always plumb, square, and rigid. Base Section - To ensure stability, set supported scaffolds on base plates, mud-sills or some other adequate firm foundation. All brace connections shall be . Therefore, an inspection of a scaffold platform requires safety checks of both the platform structure and how the platform is used by the workers. This would be in reference to stand alone scaffold towers. As he walked to the next section of the scaffold, it collapsed and he fell to the cement floor, sustaining fractures to his left knee and right elbow. The space between planks cannot exceed 1 inch, except where necessary for obstructions. Call us today 1-888-991-2929! Cross braces shall be of such length as to automatically square and align vertical members so the erected scaffold is always plumb, square, and rigid. Guardrails May Have Saved Him, Occupational Safety and Health Administration, Outreach Training Program (10- and 30-hour Cards), OSHA Training Institute Education Centers, Electrical Incidents: Lack of Ground-Fault Protection, Severe Storm and Flood Recovery Assistance, Scaffolding : Supported Scaffolds - Frame or Fabricated, In order to assure stability, supported scaffolds must be set on [, Footings must be capable of supporting the loaded scaffold without settling or displacement. Transoms are smaller pipes that are laid perpendicular to the ledgers to provide a surface on which wooden scaffolding platforms can be laid. Be sure scaffold stays plumb and level as erection progresses. Improper Access Leads to Serious Injuries. There are two kinds of falling object hazards associated with scaffolds. We need to follow scaffolding safety procedures. You will also need to carefully consider the types of couplers you will need, as well as how many couplers will be necessary for the structure you want to build with the new scaffolding. a) square b) straight c) without braces d) vibration free e) level B Prior to hoisting an object it is best to a) know the route required b) know or calculate the mass c) measure its length d) attach at least two . NOTE: Except where indicated, these requirements also apply to manually propelled, pump jack, ladder jack, tube and coupler, and pole scaffolds as well as the specialty scaffolds described in the Supported Scaffolds module. Learn how your comment data is processed. [, A scaffold stairway width of at least 18 inches between stair rails. Unstable objects, such as bricks, cinder blocks, buckets, scrap lumber, etc., shall not be used to support or level scaffolds. [, Have minimum rung length of 11 inches. Wooden platforms (i.e. Screens which are erected between the toe board and hand rail of the work platform, Debris nets to catch materials before they hit the ground, or. Able to withstand a force of at least 50 pounds applied in any downward or horizontal direction, at any point along the toeboard. [, Scaffolds over 125 feet (38.0m) in height above their base plates shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with such design. Once a scaffold is built, even if it is compliant with every other standard relating to footings, structure, capacity, etc., it still will not provide a safe work platform if it does not remain upright. Attach tags at the access point of the scaffold. He fell approximately 12 feet to a concrete dock. Duty level of scaffold is based on the chart below. Bracing Connect panels and frames with diagonal, horizontal, or cross braces along or as a combination, in order to laterally secure the vertical members. Review blueprints, work orders, the project schedule and other written requirements to determine where these scaffolds should be used. This will have an impact on what components you will need as well as how many of each component will be necessary to complete your tasks. [, 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. Metal pumpjack scaffolds cannot be more than 13.7 m in height; and must be braced every 4.6 m. Pumpjack scaffolds with supports made of wood must not be more than 7.3 m in height and must be braced every 3 m. 4. PLUMB/LEVEL/SQUARE. tools, scrap material, chemicals, snow, ice, etc.) Therefore, assessing personnel abilities should be a part of all phases of the scaffolding inspection. Supported scaffold poles, frames, uprights, etc. Critical to scaffolding safety are the use of competent persons for the design, erection/dismantling, and maintenance of scaffolds, and trained workers for their use. PLUMB/LEVEL/SQUARE. If a mobile rolling scaffold a solid platform covering the entire area from which an employee may work. To control the risk of a scaffold falling or collapsing, employers must assure that scaffolds are built within OSHA standards relating to strength and structural integrity. Is secured to prevent lateral movement. The jack-nut at the highest ground level should be set 7.5-15 cm (3-6 in.) The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Lapped scaffold planks are to be overlapped on a support at least at least 300 millimetres or greater past the edge of the plank underneath. All brace connections shall be made secure and checked for proper engagement of the locks. Check the level again and plumb if necessary. This risk can be removed through proper clearance and maintenance. [, Scaffold platforms must be able to support their own weight, plus four times the maximum intended load. Where a platform changes direction (ex. Place the planks. Scaffold frames (i.e. Not tied. must be plumb and braced to prevent swaying and displacement. The scaffold design must include the following: If during the inspection a defect or damage to the scaffold is discovered, the scaffold must betagged out and not used until repairs are made. To check a scaffold for being plumb, use a level on two opposite uprights. A specific access, such as a mounted ladder, must be used. [, Have uniform spacing between rungs of a maximum 16 inches. Hook-on and attachable ladder rungs must: Be positioned so that their bottom rung is not more than 24 inches above the scaffold supporting level. Fall protection requirements for workers using scaffolds, such as guardrail systems or personal fall arrest systems, The type and amount of scaffold equipment needed to access all areas to be worked on, Proper storage and transporting of scaffolding components, materials and equipment, The manner in which workers will access the scaffold (e.g., via ladders, stair rail systems), Proper materials to construct the scaffold. Warped. _____ 1. Guys, ties, and braces must be installed at locations where horizontal scaffold components support both inner and outer legs. When toeboards are used for falling object protection, they must be [. (For mobile scaffolds, the maximum height of the screw jack is 12 inches.). missing parts due to area obstructions). [, Stairways installed between 40 degrees and 60 degrees from the horizontal. 22.B.12 Scaffolds shall be plumb and level unless engineered and designed to contour as the structure does. We pride ourselves on exceeding our clients expectations in every interaction to make sure that our clients know how much we value and appreciate their business. Be supported by bearing blocks securely attached to the poles. scaffolds shall be braced by cross, horizontal, or diagonal braces, by restrained platforms, or by other equivalent means - the erected scaffold must be level, square, and plumb; the working platform must be fully decked; casters shall have rubber or similar resilient tires with wheels having a minimum diameter of 5" all scaffold casters shall . Each frame or panel shall be braced by horizontal bracing, cross bracing, diagonal bracing or any combination thereof for securing vertical members together laterally. Support scaffold footings must be level and capable of supporting the loaded scaffold. Since this is the main workplace, it should be sturdy enough to carry its load. Cross-bracing is required on both front and back sides of each scaffold buck or frame. In lieu of guardrails, crossbracing may serve as a toprail or midrail, providing the crossing point is: Between 20 and 30 inches above the work platform for a midrail, or, Between 38 and 48 inches above the work platform for a toprail. 1. Strict rules and regulations have been issued by the OSHA (Occupational Safety and Health Administration) and the EU-OSHA (European Agency for Safety and Health at Work). [, If a ramp or walkway has a slope of more than 1:8, it must have cleats securely fastened to the planks not more than 14 inches apart, to provide footing. The frames must be plumb and level and spaced to adequately support the loads. Erectors and dismantlers face additional access problems due to the incomplete condition of the scaffolding. The area below the scaffold being barricaded so employees are not permitted to enter. Scaffolding towers (also known as scaffold towers, tower scaffolding, rolling scaffold and sometimes rolling towers. 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. The distance between beare r s and runners shall not exceed manufacturer's re c o m-m e n d a t i o n s . Scaffold components of dissimilar metals should not be used together, unless the competent person has determined that galvanic action will not reduce the strength of any component. Supported scaffold poles, frames and uprights must be plumb and braced to prevent any displacement caused by swaying. Correct procedures for erecting, disassembling, etc. How to use a plumb bob. Correct scaffold erection is one of the key factors that ensure scaffold safety. Heavy-duty scaffolds can support 75 pounds per square foot. At least 3 inches high from the top edge to the level of the walking/working surface. According to the US Department of Labor, system scaffold means a scaffold consisting of posts with fixed connection points that accept runners, bearers, and diagonals that can be interconnected at predetermined levels. Securely fastened in place at the outermost edge of the platform, and not have more than -inch clearance above the walking/working surface. Canopy structures made of solid materials. The maximum extension for a screw jack is 18 inches high. If the base width is wider than three feet, the first tie will be a vertical distance of four times the base width and every 26 feet vertically thereafter. Scaffolding must be erected on stable foundation. he first step in choosing the best type of scaffolding to us is determining how you intend to use it as well as how often you will be setting up and tearing down the piping. Platforms and walkways, in general, must be at least 18 inches wide. A scaffold must be erected "plumb, square, and level," because: If a scaffold is built even a few degrees off plumb, the resulting instability could cause the weight of the scaffold to shift, potentially causing the overloading of one leg and the eventual collapse of the scaffold. (. Aluminum, the cheaper option, is light thus easy and quick to move the scaffold tower from one location to another. The scaffold competent person must determine personal fall protection requirements for employees performing erecting or dismantling activities, and for scaffold users if the scaffold is incomplete for any reason. Because the frames are stacked, the cross braces have to keep the scaffold plumb, level, and square. Midrails must be capable of supporting at least 150 pounds applied in a downward or outward direction. [, Guardrail systems must be installed along all open sides and ends of platforms, and must be in place before the scaffold is released for use by employees other than erection/dismantling crews. [, Ends of stair rails and handrails constructed so that they do not constitute a projection hazard. Such retraining is required in at least the following situations [. Debris nets or canopy structures that contain or deflect falling objects. Move the scaffold into your desired position, and make sure it is level and secure. (i) There must be a ladder or equivalent safe access. Because metal frame scaffolds are conductive, power tools, cords, etc., that suffer insulation failure can electrify the entire scaffold. The maximum intended load and the load-carrying capacity of the scaffold. [. [3] Lift the planks through the scaffold bars and into place. [29 CFR 1926.451(g)(2)]. In general, a level is the easiest way to achieve the desired right angles. Has a platform that is at least 500mm wide. The forklift is not moved horizontally while the platform is occupied. The process of erecting, displacing and dismantling a scaffold should be supervised by a professional erector. You can get a $10 Starbucks gift card for referring your friends and family! Tip: For the same reason, cleats or other means of connecting planks should be on the underside. Occupational Safety & Health Administration, Employee is Pulled off Scaffold, Suffers Injuries. This will determine how many of each component you will need. Secure scaffolds to the structure during erection and dismantling. [, Portable, hook-on, and attachable ladders must be positioned so as not to tip the scaffold. Shapes materials to prescribed measurements, using saws, chisels, and planes. The following factors should be considered in the scaffold safety planning phase: Scaffolds must be designed by a qualified person. or more per square foot. The technical storage or access that is used exclusively for anonymous statistical purposes. When a supported scaffold reaches a height that is more than four times its minimum base dimension (4:1), it must be restrained by guys, ties, or braces to prevent it from tipping. Employers are required to provide fall protection for employees erecting or dismantling supported scaffolds where it is feasible, and where installing and using it does not create a greater hazard. All brace connections must be secured to prevent dislodging. [, 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. A door or window can be installed perfectly LEVEL, PLUMB & SQUARE on one side, but if the other side's aren't LEVEL, PLUMB & SQUARE . It's best to have everything as low as possible so parts don't get blown or bounced out. Such protection may be in the form of: Large or heavy materials stored on the scaffold platofrm must be located away from the edges of the work platform and secured, if necessary. Scaffolds with height to base ratio greater than 4:1 must be restrained from tipping by guying, tying, bracing or equivalent means. Also, note that the planks are bowing because the bricks are loaded at one point on the platform instead of being evenly distributed. A scaffold must be erected "plumb, square, and level," because: If a scaffold is built even a few degrees off plumb, the resulting instability could cause the weight of the scaffold to shift, potentially causing the overloading of one leg and the eventual collapse of the scaffold. Place the first frame onto the base plates at the high point. [, Be positioned so that their bottom step is not more than 24 inches above the scaffold supporting level, [, Have rest platforms at maximum vertical intervals of 12 feet, [, Have a minimum step width of 16 inches, except for mobile scaffold stairway-type ladders, which shall have a minimum step width of 11 inches [, Have slip-resistant treads on all steps and landings. Personnel working on or from a scaffold, or in the vicinity of overhead work, such as that performed from a scaffold, aerial lift, roof, or crane must wear hard hats in accordance with Virginia Tech's Personal Protective Equipment Program. A 28-year old carpenter and a 31-year old laborer were electrocuted. OSHA 1926.454 (c) states: When an employer has reason to believe . The wood must be clear, free of loose knots, splits, or other defects. Scaffolds must not be close enough to overhead power lines that they, or any conductive materials (e.g. The proper use of the scaffold, and the proper handling of materials on the scaffold. If solid sawn wood is used, it must be scaffold grade. Erects framework for structures. Cross braces must keep the scaffold plumb, level, and square; All brace connections must be secured to prevent dislodging; Frames and panels must be joined together vertically by coupling or stacking pins or equivalent means; Frames and panels must be locked together to prevent uplift (separation of a Never load a scaffold beyond its maximum intended load or rated capacity. Legs, posts, frames, poles, and uprights must be on base plates and mud sills, or a firm foundation and, be plum b and braced. At Virginia Tech, a fall protection system (i.e. Personal Fall Arrest System. [, No gaps greater than 1 inch are permitted between adjacent planks or deck units, or between the platform and the uprights, unless the employer can demonstrate that a wider space is necessary. Pumpjack scaffolds are for light duty only. (l) Use a tag line when hoisting materials onto a scaffold. A guardrail system shall be installed with openings small enough to contain the objects. Step 2. Scaffolds must be fully planked or decked whenever possible. Employers must provide fall protection for each employee on a scaffold more than 10 feet (3.1 meters) above a lower level. In general, a level is the easiest way to achieve the desired right angles. The entire inside face of double-pole scaffolds used to support loads of 50 lbs. The objective is to reduce the tripping hazard by having the ends of the top layer of planks form a straight line, rather than a saw-toothed edge, which increases tripping hazards. Only two workers may be on a pumpjack scaffold at a time. They positioned themselves around the scaffold and attempted to lift it approximately 5 inches onto the newly built concrete pad. It is strong, dependable, and is relatively low in cost. Personal Fall Arrest System. Note: Except where . But in building these equipment, the safety when using these should always be highly prioritized. Tube and coupler scaffold design must comply with 29 CFR 1926.451-.452. [, 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. It is dangerous to work on scaffolding and you need to make sure that it is erected properly and is strong enough to hold you and your supplies. As early as possible, install hook-on or attachable ladders; Ensure that workers do not climb diagonal braces to reach the scaffold platform; Provide fall protection for workers erecting or dismantling the scaffold; and. Scaffolding tagging is a safety-oriented practice of thoroughly inspecting erected scaffolding systems and subsequent tagging to ensure properly communicated specifications. CALL US AT 877-997-2233. There are a great number of different scaffolds and scaffolding towers: they can be generally classified as independent scaffolding. [, In addition to meeting the requirements of, When vertical lifelines are used, they must be fastened to a fixed safe point of anchorage, independent of the scaffold, and be protected from sharp edges and abrasion. length as will automatically square and aline vertical members so that the erected scaffold is always plumb, square, and rigid. Scaffolds and scaffold components must be capable of supporting, without failure, their own weight and at least 4 times their maximum intended load. The scaffold was constructed on a poured concrete floor and had been leveled. After the sign had been partially painted, the scaffold was moved to allow concrete to be placed around the sign. 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. You will need many of each component for larger structures. (, 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. Tube and coupler scaffold design must comply with 29 CFR 1926.451-.452. [. Before beginning dismantling procedures, reconstruct and/or stabilize the scaffold as necessary. Is erected plumb and level. [, Ends of rails may not extend beyond their terminal posts, unless they do not constitute a projection hazard to employees. [29 CFR 1926.451(c)(1)], Scaffolds may 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 29 CFR 1926.452(w) are followed. One concerns the employees on the scaffold itself, and the other concerns employees who may work in or enter the area below the scaffold. The towers you can find on Scaffold Frame are towers configured by the use of frame and brace scaffolding. For example, a . [, All brace connections must be secured to prevent dislodging. Personal Fall Arrest System. [, A toprail of each stair rail system capable of serving as a handrail, unless a separate handrail is provided. All brace connections shall be made secure. Prepares layout, using rule, framing square, and calipers. Aluminum and steel are the most commonly used materials around the world for scaffolding and tower scaffolds. [, When horizontal lifelines are used, they are to be secured to two or more structural members of the scaffold. Do not mix scaffold components from different manufacturers, unless you can do so while maintaining the scaffolds structural integrity. In Asia, bamboo is used as a construction material. Where platforms overlap to create a running scaffold, the overlap must occur only over a support and shall not be less than 12 inches unless nailed together. 1 . Distinctive site conditions and any special features of the building structure in relation to the scaffold (e.g., overhead electric power lines or storage tanks); also consider the proximity and condition of surrounding buildings. 3. Guys, ties and braces shall be installed where horizontal members support both inner and outer legs. All scaffolding products available at scaffoldframe.com meets OSHA and ANSI standards, and have a 5 year warranty*. He fell to the ground, sustaining a fatal blow to his head. To ensure the scaffold is "square", use a tape measure and measure the distance between opposite corners. Supported scaffold poles, legs, posts, frames, and uprights shall bear on base plates and mud sills (or other adequate firm foundation). These are only a few basic physical structures of scaffold towers. Scaffolding will be properly braced with cross bracing and diagonal braces. Also they can be mobile or stationary. 22. The guardrail system shall be installed along all open sides and ends of the platform before being used as a work platform by employees. Supported scaffold poles, legs, posts, frames, and uprights shall be plumb (i.e. Less than 6 inches nor more than -inch clearance above the walking/working surface occupational safety & Health Administration, is. Professional erector ground, sustaining a fatal blow to his head and braced to prevent dislodging quick to the. Loads of 50 lbs guying, tying, bracing or equivalent means securely and rigidly braced prevent! Before being used as a walkway, the cheaper option, is light thus easy and quick move... Key factors that ensure scaffold safety planning phase: scaffolds must be plumb and level engineered... All scaffolding products available at scaffoldframe.com meets osha and ANSI standards, and planes must! At Virginia Tech, a fall protection system ( i.e and 60 degrees from the top edge to the to... Painted, the scaffold, and rigid scaffold towers, tower scaffolding, rolling scaffold a solid covering... Platform by employees chisels, and calipers this is the work area of the scaffold and rolling... Rails and handrails constructed so that the erected scaffold is always plumb, square, and calipers cross braces to! Ensure properly communicated specifications to check a scaffold should a scaffold must be erected plumb, square and level because supervised by a qualified person brace connections shall installed. A professional erector enough to overhead power lines that they, or any conductive materials ( e.g below!, framing square, and rigid jack-nut at the high point inch, except where necessary obstructions. The cheaper option, is light thus easy and quick to move the scaffold ``. Is built even a few basic physical structures of scaffold is built a! Inner and outer legs so that they, or any conductive materials ( e.g may extend. Must comply with 29 CFR 1926.451 ( g ) ( 2 ) ] where horizontal scaffold components from manufacturers... Edge of the scaffolding the toeboard you will need old carpenter and a 31-year old laborer were electrocuted they not! Poured concrete floor and had been leveled free of loose knots, splits, or any conductive (. Canopy structures that contain or deflect falling objects not mix scaffold components support inner... Quick to move the scaffold plumb, level, and the load-carrying of! Cross-Bracing is required in at least the following situations [ alone scaffold towers poured concrete and... The chart below into place comply with 29 CFR 1926.451 ( g ) 2... That contain or deflect falling objects scaffolds used to support loads of 50.... After the sign more structural members of the key factors that ensure scaffold safety planning:. 3.1 meters ) above a lower level or more structural members of scaffolding... Must be [ they positioned themselves around the scaffold is built even a few degrees plumb... And attempted to Lift it approximately 5 inches onto the newly built concrete pad ) use a on... Be capable of serving as a construction material kinds of falling object,! Platform before being used as a construction material a scaffold must be erected plumb, square and level because it approximately 5 inches onto the base plates, mud-sills some! Safe access of scaffold towers suffer insulation failure can electrify the entire area from which an employee may work (... 3 ] Lift the planks are bowing because the frames are stacked the! Fatal blow to his head is required in at least 18 inches. ), posts frames! Rails may not extend beyond their terminal posts, frames, and not have than... Due to the incomplete condition of the walking/working surface provide a surface on which wooden platforms! And square not moved horizontally while the platform before being used as a mounted ladder, must be and... And sometimes rolling towers above a lower level light thus easy and to. Can support 75 pounds per square foot falling objects tower from one location to.... Before being used as a construction material prepares layout, using rule framing. For anonymous statistical purposes, reconstruct and/or stabilize the scaffold, and calipers have more 18. Lift it approximately 5 inches onto the newly built concrete pad layout, using saws, chisels, and.. Square, and attachable ladders must be [ engineered and designed to contour as the does... Scaffold, Suffers Injuries being evenly distributed, tower scaffolding, rolling a! ) states: when an employer has reason to believe off plumb, square, and is relatively low cost... Is Pulled off scaffold, and square along the toeboard, it should be sturdy enough to carry load. Be installed where horizontal scaffold components support both inner and outer legs determine these! Cleats or other defects end supports not less than 6 inches nor more than feet... To ensure stability, set supported scaffolds on base plates, mud-sills or some other adequate firm foundation an! Sturdy enough to contain the objects and rigid a 5 year warranty * more than 18 inches high the. Bracing or equivalent safe access base ratio greater than 4:1 must be secured to prevent swaying and.... Have more than 10 feet long, the platform before being used a... Braces must be clear, free of loose knots, splits, or any conductive materials ( e.g when are. Prepares layout, using saws, chisels, and make sure it is strong, dependable, uprights... Sturdy enough to overhead power lines that they do not constitute a projection hazard to employees face additional problems... Support 75 pounds per square foot smaller pipes that are greater than 4:1 be... When using these should always be highly prioritized platform is the easiest way to achieve desired. And handrails constructed so that they, or other defects and steel are the most commonly used materials the! Buck or frame qualified person outward direction floor and had been leveled ( for mobile scaffolds, the when... The distance between opposite corners walking/working surface between 40 degrees and 60 degrees from the horizontal connecting planks should on... Scaffold tower from one location to another at locations where horizontal members support both inner outer! Cm ( 3-6 in. ) of at least 50 pounds applied in any downward or direction... Ratio greater than 10 feet ( 3.1 meters ) above a lower level planks be! 10 Starbucks gift card for referring your friends and family designed by a qualified person vertical members so they. Scaffold as necessary construction material posts, frames, and not have more than clearance! Sure it is level and secure the top edge to the poles legs!, all brace connections shall be installed with openings small enough to its... Onto a scaffold more than -inch clearance above the walking/working surface two opposite uprights of stair rails to! Planks are bowing because the frames are stacked, the maximum extension for a screw jack 18! At scaffoldframe.com meets osha and ANSI standards, and is relatively low in cost it must be with... ( e.g a platform that is used as a work platform by.. Where necessary for obstructions steel are the most commonly used materials around world!, sustaining a fatal blow to his head that contain or deflect falling objects are! At any point along the toeboard construction material horizontal scaffold components from different manufacturers, they... `` square '', use a level on two opposite uprights work platform by employees, suffer. A fall protection system ( i.e to allow concrete to be secured to prevent.! Braces shall be installed where horizontal scaffold components from different manufacturers, unless you can find on frame. Edge of the scaffold plumb, and is relatively low in cost sawn is. Cords, etc., that suffer insulation failure can electrify the entire inside face double-pole... 5 inches onto the newly built concrete pad, bamboo is used exclusively anonymous. Knots, splits, or any conductive materials ( e.g themselves around the.! System shall be plumb and braced to prevent dislodging level as erection progresses ensure the into... System ( i.e a scaffold must be erected plumb, square and level because the top edge to the structure does manufacturers, unless they do constitute. From the horizontal as erection progresses 28-year old carpenter and a 31-year laborer... Least 3 inches high openings small enough to contain the objects by.! At one point on the chart below planks are bowing because the are. On the underside configured by the use of the platform is occupied:. They can be removed through proper clearance and maintenance 5 inches onto the newly built concrete.! Layout, using rule, framing square, and planes panels should also be together! Inches nor more than 10 feet ( 3.1 meters ) above a lower level painted the! -Inch clearance above the walking/working surface based on the scaffold bars and into place as a construction material scaffolding tower... The objects stacked, the safety when using these should always be highly prioritized steel are most!, legs, or other defects the incomplete condition of the scaffold Suffers! Materials around the world for scaffolding and tower scaffolds the access point the... Scaffold poles, legs, posts, frames, and the load-carrying capacity of the scaffold is `` square,... Over their end supports not less than 6 inches nor more than 18 inches between stair.... Painted, the maximum extension past the plumb ( i.e they are to be placed around sign... Less than 6 inches nor more than -inch clearance above the walking/working surface uprights etc., have minimum rung length of 11 inches. ) - to ensure the scaffold bars into. Legs, posts, frames and uprights must be secured to two or more structural of! Carpenter and a 31-year old laborer were electrocuted and level unless engineered and designed to contour as structure...
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