Plumb and level scaffold. Learn how your comment data is processed. Warped. When brackets are used to support cantilevered platforms, they must: Figures 14 & 15. Scaffold Guardrail Systems - Standard rails are required on all scaffold towers. Scaffolding shall be designed by a qualified and competent . Midrails must be installed at a height approximately midway between the toprail and the platform surface. [, Nothing that could cause a slip, trip or fall (i.e. If using wooden planks, they must extend beyond the supporting Toeboards must be capable of withstanding at least 50 pounds applied in a downward or outward direction. and must be provided on any scaffold 10 feet or more above a lower level. [, When horizontal lifelines are used, they are to be secured to two or more structural members of the scaffold. Correct scaffold erection is one of the key factors that ensure scaffold safety. Aluminum and steel are the most commonly used materials around the world for scaffolding and tower scaffolds. Scaffold Guardrail Systems - Standard rails are required on all scaffold towers. A guardrail system shall be installed with openings small enough to contain the objects. Suspension scaffold rigging must at least 6 times the intended load. Greater variations in riser height are allowed for the top and bottom steps of the entire system (not for each flight of stairs). Has lockable wheels if it is a mobile rolling scaffold. Horizontal members are parallel, level, and not more than 22 vertical inches apart. Workers are most vulnerable to fall hazards when climbing on or off a scaffold. Scaffolding means a convenient platform for persons to work at height. The main tools involved in scaffolding are basic construction tools, ladders, power machines and also very specific safety equipment such as safety glasses, ear protectors, fall arrest equipment and so on. Every scaffold must be erected by qualified technicians based on the information in the design drawings. Plumb and level all scaffolds as the erection proceeds. Scaffolding will be properly braced with cross bracing and diagonal braces. decking, planks) must not be painted to hide defects. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the direct supervision of a scaffold competent person. Scaffolds must be plumb, square and adequately braced with proper access. 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 . A scaffold must be erected "plumb, square, and level," because: Answer: 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. CALL US AT 877-997-2233. Extreme weather or damage to structural components can also affect a scaffold's stability. 2. Personal Fall Arrest System. Light-duty scaffolds can support 25 pounds per square foot. The ladder must extend 1 m (3 ft.) above the landing. There are various types of supported scaffolds: frame scaffolds, tube and clamp scaffolds, system scaffolds, mobile scaffolds, pump jack, ladder jack and wood . The maximum extension of the plank cannot be more than 12 inches for planks that are 10 feet long or less. The two measurements should be equal. We will deliver to you the highest quality property and casualty insurance programs and strategic planning consultation services in a manner that is most suitable to achieving your business goals. Supported scaffold poles, frames and uprights must be plumb and braced to prevent any displacement caused by swaying. [. missing parts due to area obstructions). Training shall include [. [29 CFR 1926.451(g)(2)]. Crawling Board. As a general rule, a scaffold becomes inherently unstable once its height is four times its minimum base dimension, even if it is plumb and square. 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. In the same vein, a "true" corner would be squared to exactly 90 degrees. Inadequacies in an affected employee's work indicate that the employee has not retained the necessary proficiency. Hardware should be included to fasten the planks into place. Ensure that a competent person supervises and directs workers erecting, moving, dismantling or altering a scaffold; Provide a safe means of access for each worker erecting or dismantling the scaffold. Since this is the main workplace, it should be sturdy enough to carry its load. All scaffolding products available at scaffoldframe.com meets OSHA and ANSI standards, and have a 5 year warranty*. Stack up the planks, braces and bases on the bottom between the wheel wells, and stack the frames on top. [, 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. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the supervision of a scaffold competent person.Appropriate fall protection may be required by the competent person for such activities or where the . [, Stair rails and handrails surfaced to prevent punctures or lacerations to employees, and to prevent snagging of clothing. 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. The base and mud sill must provide a solid surface for the feet to sit upon so that the scaffold doesn't sink, move, settle, or shift. Heavy-duty scaffolds can support 75 pounds per square foot. [, 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.). The training must include: assessment of the base material the scaffold will be erected upon, load calculations for materials and personnel, erection and dismantling . (If manufactured before 1/1/2000, top rails must be between 36 - 45 inches above the platform surface.) Installed protective coverings to prevent accidental contact with the lines. The other five workers were hospitalized with electrical burns. After the sign had been partially painted, the scaffold was moved to allow concrete to be placed around the sign. 2. Supported scaffold poles, frames, uprights, etc. For long (running) scaffolds, guys, ties, and braces shall be installed at each end of the scaffold and at horizontal intervals not to exceed 30 feet. 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. Pinning - Frames and panels must be joined together vertically through the use of stacking pins or coupling, or equivalent means. The frames must be plumb and level and spaced to adequately support the loads. All joints must be TRUE represents being SQUARE on both the LEVEL & PLUMB axis at the same time on all sides of the unit being installed. 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. The scaffold design must include: Proper materials to construct the scaffold. Maintaining a scaffold or tower scaffolding is of crucial importance, especially if the structure is intended to last for a long time. 5. The number one scaffold hazard is worker falls. [, Have rest platforms provided at a maximum of 35-foot vertical intervals. Even if they are "in the way," braces should not be removed while work is being performed on a scaffold! (1) Scaffolds shall be properly braced by diagonal braces for securing vertical members together laterally, and the cross braces shall be of such length as will automatically square and align vertical members so that the erected scaffold is always plumb, square, and rigid. the diagonal brace to keep the scaffolding square. (True or False) _____ 2. Training must include how to safely do the following: Erectors and dismantlers of tube and coupler scaffolds are at particular risk because their work starts before ladders, guardrails and platforms are completely installed. 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. Do not force frames or braces to fit - level the scaffold until proper fit can easily be made. Tube and coupler scaffold design must comply with 29 CFR 1926.451-.452. Pumpjack scaffolds are for light duty only. The employer must provide suitable access to and between scaffolds, such as portable ladders, hook-on ladders, attachable ladders and stairway-type ladders. Because metal frame scaffolds are conductive, power tools, cords, etc., that suffer insulation failure can electrify the entire scaffold. Contact us today 1-209-634-2929 for your comprehensive California contractor insurance quote! Also they can be mobile or stationary. The employer was cited for not assuring the stability of the scaffold before requiring the worker to use it. Check the level again and plumb if necessary. l) The poles, legs, or uprights of scaffolds will be plumb, secured, and rigidly braced to prevent swaying and/or displacement. 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. [, 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. Aluminum, the cheaper option, is light thus easy and quick to move the scaffold tower from one location to another. 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. This site uses Akismet to reduce spam. [3] Lift the planks through the scaffold bars and into place. B. The scaffold should be plumb, level and square. Therefore, assessing personnel abilities should be a part of all phases of the scaffolding inspection. 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. from the top of the sill, depending on the slope. 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. General Guidelines. All brace connections shall be made secure. (j) Scaffold planks must extend over their end supports not less than 6 inches nor more than 18 inches. Not tied. . [, Steps and rungs of ladders and stairway-type ladders must line up vertically with each other between rest platforms. Do not force frames or braces to fit - level the scaffold until proper fit can easily be made. If a mobile rolling scaffold a solid platform covering the entire area from which an employee may work. [, When midrails are used, they must be installed at a height approximately midway between the top edge of the guardrail system and the platform surface. Place the first frame onto the base plates at the high point. He fell to the ground, sustaining a fatal blow to his head. 4. Frames and panels shall be braced by cross, horizontal, or diagonal braces, or combination thereof, which secure vertical members together laterally. [, Have uniform spacing between rungs of a maximum 16 inches. (For mobile scaffolds, the maximum height of the screw jack is 12 inches.). To ensure the scaffold is "square", use a tape measure and measure the distance between opposite corners. One exception is when the scaffold platform is within 14 inches of the face of the work. All brace connections shall 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. 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. Plumb and level the scaffold as it is being erected. The correct procedures for dealing with those hazards. Each frame or panel shall be braced by horizontal bracing, cross bracing, diagonal bracing or any combination thereof for securing vertical members together laterally. (F) Tubular welded frame scaffolds. 1. 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