Uplift is the separation of a frame from the frame below it. Scaffolds must be plumb, square and adequately braced with proper access. Learn how your comment data is processed. Scaffolds and scaffold components must be capable of supporting, without failure, their own weight and at least 4 times their maximum intended load. Unsafe scaffolding has the potential to result in death or serious . [, 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. 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. 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. [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. Hardware should be included to fasten the planks into place. [, Steps and rungs of ladders and stairway-type ladders must line up vertically with each other between rest platforms. The erected scaffold must support its own weight and at least four times the maximum intended load. It's best to have everything as low as possible so parts don't get blown or bounced out. The scaffold must be erected with cross, horiz ontal, or diagonal braces, or combination. If solid sawn wood is used, it must be scaffold grade. The standard dimensions are 5 foot and 7 foot long. B. building materials, paint roller extensions, scaffold components) that may be handled on them, come closer than 10 feet to the power line. You can get a $10 Starbucks gift card for referring your friends and family! missing parts due to area obstructions). Call us today 1-888-991-2929! Never load a scaffold beyond its maximum intended load or rated capacity. Be supported by bearing blocks securely attached to the poles. [, Guys, ties, and braces must be installed according to the scaffold manufacturer's recommendations or at the closest horizontal member to the 4:1 height ratio and be repeated every 20 vertical feet for narrow scaffolds (3 feet or less in width), and every 26 vertical feet for scaffolds greater than 3 feet in width. [29 CFR 1926.451(g)(2)]. Scaffolds are generally rated as light, medium or heavy duty and must be able to support the correlating weight of workers and materials required for each type. [, OSHA standards specifically forbid climbing cross-braces as a means of access. 22. Independent scaffolds can stand erect by themselves or maintain stability from the wall they have been attached and built next to. The ends of each platform must be cleated or restrained by hooks (or equivalent) to prevent accidental displacement, or must extend at least 6 inches over the centerline of the support. Do not force frames or braces to fit - level the scaffold until proper fit can easily be made. 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. For lathing and plastering, a gap of 18 inches is permitted. Therefore, assessing personnel abilities should be a part of all phases of the scaffolding inspection. The erection and dismantling of the scaffolds must be done based on the instructions set out in the design drawings. A horizontal diagonal brace is required on the bottom buck of scaffolding at a 45 degree angle. Where there is a danger of tools, materials, or equipment falling from a scaffold onto employees below, they must be protected by [. Supported scaffold poles, legs . 3. _____ 1. The correct procedures for dealing with those hazards. Duty level of scaffold is based on the chart below. 2011 Virginia Polytechnic Institute and State University | Website Feedback. [, 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. A specific access, such as a mounted ladder, must be used. In addition, there is a lot of information regarding building your own scaffold towers on the Internet. Find out more here or call us at 209-634-2929! 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. [3] Lift the planks through the scaffold bars and into place. Too much material being stored on the platform. The other five workers were hospitalized with electrical burns. (j) Scaffold planks must extend over their end supports not less than 6 inches nor more than 18 inches. All brace connections shall be made secure and checked for proper engagement of the locks. As one of the fastest growing agencies in California, GDI Insurance Agency, Inc. is able to provide its clients with the latest and greatest of what the insurance industry has to offer and much, much more. Standards are vertical pipes that are connected with clamps or couplers to give the structure its height; ledgers are horizontal braces that steady the structure and give it width. Light-duty scaffolds can support 25 pounds per square foot. Employees involved with set up (or near) the scaffold must wear hard hats. Scaffolding must be erected on stable foundation. Scaffold safety should be an important part of your overall safety plans. [, Have minimum rung length of 11 inches. [, Be seated with side-brackets parallel to the frames, and end-brackets at 90 degrees to the frames. Each section of the framework measured 6'5" high. Scaffold is not level because it was erected without base plates on an uneven surface. Install the diagonal brace to keep the scaffolding square. Due to their strength, these scaffolds are frequently used where heavy loads need to be carried, or where multiple platforms must reach several stories high. Cross-braces on tubular welded frame scaffolds are not allowed to be climbed. (True or False) _____ 2. Training shall include [. perfectly vertical) and braced to prevent swaying and displacement. Supported scaffolds are scaffolds supported from the ground by rigid elements such as outrigger beams, poles, legs, base plates, sills and posts. [, Do not load the scaffold or any component parts beyond their maximum capacity (their own weight and 4:1 the maximum intended load). Erect plumb, square and rigid with all brace connections securely fastened. A. 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. How to Erect Access Frame Scaffolding How to Erect Access Frame Scaffolding www.worksafebc.com Select . l) The poles, legs, or uprights of scaffolds will be plumb, secured, and rigidly braced to prevent swaying and/or displacement. Erectors and dismantlers face additional access problems due to the incomplete condition of the scaffolding. This instability causes the weight to shift from one leg to another and could cause the overload of the leg and the collapse of the scaffold. Top rails must be capable of supporting at least 200 pounds applied in a downward or outward direction. Once erected, provide toeboards on all railed sides to prevent falling object hazards. [, 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. 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. The hazards of type of scaffold being used. must be plumb and braced to prevent swaying and displacement. The employer must provide suitable access to and between scaffolds, such as portable ladders, hook-on ladders, attachable ladders and stairway-type ladders. The picture above describes TRUE. Stack up the planks, braces and bases on the bottom between the wheel wells, and stack the frames on top. Crossbracing is required on both front and back sides of each scaffold buck or frame. [, Stair rails and handrails surfaced to prevent punctures or lacerations to employees, and to prevent snagging of clothing. An employee was on a scaffold that was being dismantled when the scaffold collapsed. Has lockable wheels if it is a mobile rolling scaffold. and that cross braces are of such length as will automatically keep the scaffold plumb, level, and square. A scaffold must be erected "plumb, square, and level," because: - Ans-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. Scaffolds must not be close enough to overhead power lines that they, or any conductive materials (e.g. The planking used must be "scaffold grade.". The scaffold was not secured to wooden footing supports, nor was it tied to the building. [, 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. The height of the scaffold in relation to the minimum base width, wind loads, the use of brackets or cantilevered platforms, and Top rails (manufactured after 1/1/2000) must be 38 - 45 inches above the platform surface. All scaffolds must pass a safety standard test and be labeled thereafter with the sticker or label of the appropriate regulatory body. Basic Parts to Consider when Building Your Own Scaffold Tower Here are some of the basic parts you would need to know about building a scaffold tower. tools, scrap material, chemicals, snow, ice, etc.) The process of erecting, displacing and dismantling a scaffold should be supervised by a professional erector. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the direct supervision of a scaffold competent person. For example, if wrapped with mesh, will the scaffold support expected wind loads? Tube and coupler scaffold design must comply with 29 CFR 1926.451.452. (Your Answer) 3. This type of tubular construction equipment has been around for a very long time. [, Not be used as work platforms when rungs are less than 11 inches in length, unless each affected employee uses appropriate fall protection. [, Be used only to support personnel, unless the scaffold has been designed for other loads by a qualified engineer and built to withstand the tipping forces caused by other loads. Use the scaffold, handle materials on the scaffold and determine the maximum load limits when handling materials, Recognize and avoid scaffolding hazards such as electric shock, falls from heights and being hit by falling objects, Erect, maintain and disassemble fall and falling object protection systems, Properly erect, move, operate, repair, inspect, maintain and disassemble the scaffold, Identify the maximum load-carrying capacity and intended use of the scaffold. Unstable objects, such as bricks, cinder blocks, buckets, scrap lumber, etc., shall not be used to support or level scaffolds. 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 . [, Slip-resistant surfaces on treads and landings. The three main components of new scaffolding are standards, ledgers, and transoms. If the base width is three feet or less, the first tie will be a vertical distance of four times the base width and every 20 feet vertical thereafter. and must be provided on any scaffold 10 feet or more above a lower level. rather than a scaffolding set; the tower will be much shorter and easier to tear down and construct, though it will only be suitable for smaller jobs. The face of the work (ex. TRUE represents being SQUARE on both the LEVEL & PLUMB axis at the same time on all sides of the unit being installed. In such cases, the platforms must be as wide as feasible, and fall protection must be provided. Personal Fall Arrest System, Guardrail System, or 3/4 inch (1.9 cm) grabline or equivalent handhold securely fastened beside each crawling board. 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. Medium-duty scaffolds can support 50 pounds per square foot. Crawling Board. by Grant Davis | Construction, Insurance, Safety Tips | 0 comments. Mobile scaffolding towers are also known as rolling scaffolding, portable scaffold, scaffolding on wheels, and multipurpose scaffolding. They can also choose if they want it mobile or stationary. (For mobile scaffolds, the maximum height of the screw jack is 12 inches.). These scaffolds can be assembled in multiple directions, making them the preferred option for work surfaces with irregular dimensions and/or contours. [, 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 (i.e., nailed together) to prevent movement. Check the level again and plumb if necessary. Others, such as swivel couplers, can be used for a variety of purposes; they can be positioned to allow various angles and crosses among the types of piping. Correct procedures for erecting, disassembling, etc. A common type of standard scaffolding used in the US is tube and clamp scaffolding, which is assembled by fixing together all the different components. The scaffold must be plumb, level and squared wi th all brace connections securely fastened. [, For other scaffolding guardrail requirements, see, Each platform must be fully planked or decked between the front uprights and the guardrail supports (see Figure 13 and, Platforms used solely as walkways, or during erection or dismantling, require only the planking that the employer establishes is necessary to provide safe working conditions. In certain industries such as oil refinery, aviation, gas and chemical manufacture it is necessary to use glass fiber structures as these will not spark or corrode in situations where gasoline, solvents, electricity and so forth are present. Platforms may be coated periodically with wood preservatives, fire retardants, and slip-resistant finishes, provided they do not obscure the top or bottom wood surfaces. Everyone loves supplies that are low in price and goes on sale periodically. Scaffold Frame keeps only high grade steel scaffolding in inventory, but aluminum scaffold is available on request. OSHA 1926.454 (c) states: When an employer has reason to believe . 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. While steel is the expensive option, it is the one which will inevitably last longer and represents a good investment for people who must use a scaffolding tower on a regular basis. [, Scaffolds and scaffold components must be inspected for visible defects before each shift by a competent person, and after each occurrence that could affect a scaffold's integrity (such as being struck by a crane). [, Employees performing overhand bricklaying operations from a supported scaffold must be protected from falling from all open sides and ends of the scaffold, except at the side next to the wall being laid. Prepares layout, using rule, framing square, and calipers. Inadequacies in an affected employee's work indicate that the employee has not retained the necessary proficiency. Point loading, or concentrating too much of the load in one area. Greater variations in riser height are allowed for the top and bottom steps of the entire system (not for each flight of stairs). Therefore, an inspection of a scaffold platform requires safety checks of both the platform structure and how the platform is used by the workers. A tube and coupler scaffold has a platform(s) supported by tubing, and is erected with coupling devices connecting uprights, braces, bearers and runners. Scaffolds may be closer to overhead power lines than specified below 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 [. [, 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. Screw jacks must be used to level scaffolding on uneven surfaces. Heavy-duty scaffolds can support 75 pounds per square foot. Such a scaffold can be set up on either side of the building, and offers a great level of flexibility. All brace connections shall be . And frames that stick out past the side of the bed can be . 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 [29 CFR 1926.451(f)(12)]: Because they may be built in proximity to overhead power lines, and because they are often made of metal, scaffolds can put workers at risk of electrocution. Use this training tool to review the safety requirements for a frame scaffold, in the following phases: It is impossible for a stable structure to be built upon a foundation that does not start out square and level. (Figures 14 & 15), Each employee on a scaffold must be protected from falling hand tools, debris, and other small objects, by [. must be plumb and braced to prevent swaying and displacement. Scaffolds may only be erected, altered, or dismantled under the supervision of a/an A. [, To prevent slippage, platforms must be cleated or otherwise restrained at each end, or else overlap their support at least 6 inches (, 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). This risk can be removed through proper clearance and maintenance. The scaffold should be plumb, level and square. Personal Fall Arrest System. Personal fall protection must be required and provided by the employer where the installation and use of such protection is feasible and does not create a greater hazard. Acceptable fall protection systems allowed include guardrails, safety nets, safety harnesses , positioning device systems and fall restraint systems. 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