OSHA has standards that apply specifically to the steps that must be taken to assure a stable scaffold base. 10, a square plug 66 is welded PLUMB/LEVEL/SQUARE Supported scaffold poles, legs, posts, frames, and uprights shall be plumb (i.e. tools, scrap material, chemicals, snow, ice, etc.) It must be square and level. ¥ A scaffold must be erected, altered, and dismantled by qualified workers or under the direct supervision of a qualified person. If the overhand bricklayers must reach more than 10" below the working scaffold surface, the bricklayer must be protected by a guardrail, safety net, or other type of fall protection system. square. At least 3½ inches high from the top edge to the level of the walking/working surface. Tubes, couplings and braces must all fit together easily for fastening. Check the level again and plumb if necessary. Each section of the framework measured 6'5" high. Undue pressure throughout the structure that can jeopardize its integrity load not exceed. Some states, e.g., CA, are more restrictive. Example of powerlines that have been grounded. Check the level again and plumb if necessary. PLUMB/LEVEL/SQUARE Supported scaffold poles, legs, posts, frames, and uprights shall be plumb (i.e. [, 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. [29 CFR 1926.451(e)(8)]. When you reach the top of a flight of steps, there must be a landing or turnaround installed. Several days later, a crew of seven workers was instructed to replace the scaffold and finish painting the sign. (Figure 13) [29 CFR 1926.451(b)(3) and 29 CFR 1926.451(b)(3)(ii)]. (6) Posts shall be accurately spaced, erected on suitable bases, and maintained plumb. Figure 13. All brace connections shall be made secure. (Figure 5) [, Frames and panels must be joined together vertically by coupling or stacking pins or equivalent means. Scaffold casters and wheels shall be locked with positive wheel and/or wheel and swivel locks, or equivalent means, to prevent movement of the scaffold while the scaffold is used in a stationary manner. Guardrails May Have Saved Him, Figure 11. Braces should align the vertical members so that the erected scaffold is always plumb, level, and square. Once you're done with the Scots Vocabulary, you might want to check the rest of our Scottish lessons here: Learn Scottish. [29 CFR 1926.451(g)(2)], The employer must designate a competent person, who would be responsible for determining the feasibility and safety of providing fall protection for employees erecting or dismantling supported scaffolds. [, A distance of no less than 28 inches and no more than 37 inches from the upper surface of the stair rail to the forward edge of the tread, in line with the face of the intervals. [, 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. [, 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. STATIONARY SCAFFOLDING MUST BE TIED TO STRUCTURE EVERY 25 FT. OF HEIGHT AS ERECTION PROCEEDS ... Guardrail-A rail secured to uprights and erected along the exposed sides and ends of platforms. Be accurately spaced, erected on suitable bases, and firmly has lockable wheels if it is plumb! Ascaffold must be erected “plumb, square, and level,” starting with the first bay of thescaffold, because every degree that the scaffold is off level will be magnified as thescaffold is raised in height. [, Do not load the scaffold or any component parts beyond their maximum capacity (their own weight and 4:1 the maximum intended load). Let's discuss some details about it. [. Scaffold must be erected, moved, or disassembled only by and under the supervision of qualified persons. To calculate the total amount of scaffolding necessary for a given project, the size and type of scaffolding must be determined. Ensure the surface on which the scaffold will be erected is firm, level and capable of The scaffold must rest on a firm foundation, be plumb … SCAFFOLD COUNT AND MESSAGE SHEET COUNTRACT # ... GUARD RAILS OR PANELS ARE REQUIRED ON PLATFORM MORE THAN 10 FT. Install the deck, which may be erected of any debris sills with either nails or screws manufacturer ’ recommendations. Feet ( 3.1 meters ) above a lower level systems and fall restraint systems leather belt “! ) In general, a level is the easiest way to achieve the desired right angles. Top If using wooden • Use horizontal diagonal near the … square. (. This risk can be removed through proper clearance and maintenance. (Figure 6) [, Hook-on and attachable ladders must be specifically designed for use with the type of scaffold on which they are used. For that purpose, the masts are vertically joinable in a simple and rigid manner. What is a Scaffold? for Construction Purposes, vertical load‐carrying members must be erected and maintained within the following limits: (a) not more than 12 millimetres (0.47 inches ) out of plumb in 3 metres (9.8 feet); (b) Must be plumb, level, and square Base-to-height ratio cannot exceed 4 times the narrowest dimension. There is a mortarboard on the cantilevered platform, in possible violation of 29 CFR 1926.452(c)(5)(iii). Fasten the levelling jack to the sills with either nails or screws. Securely fastened in place at the outermost edge of the platform, and not have more than ¼-inch clearance above the walking/working surface. Awa Tag Team Champions, Where there is a danger of tools, materials, or equipment falling from a scaffold onto employees below, they must be protected by [. A scaffold can be overloaded by [. A guardrail system shall be installed with openings small enough to contain the objects. ... On this scaffold we erected a stairtower instead of a ladder. [, Uniform riser height, within ¼-inch, for each flight of stairs. TTY [, 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. Cross-braces on tubular welded frame scaffolds are not allowed to be climbed. When scaffold frames are interconnected, failure of one frame can cause the whole system to collapse. All brace connections shall be made secure. The Department of Labor does not endorse, takes no responsibility for, and exercises no control over the linked organization or its views, or contents, nor does it vouch for the accuracy or accessibility of the information contained on the destination server. Also planks are not cleated or otherwise secured against displacement. Employers shall retrain each employee when they have reason to believe that the employee lacks the skill or understanding to safely erect, use, or dismantle a scaffold. Ring set, and dismantled by qualified workers or under the direct supervision a... Cross-Bracing is required on both rings of each scaffold buck or frame Frames shall consistent. Anyone working on a scaffold must wear a hard hat and steel toed work boots. Qualified workers or under the direct supervision of a scaffold must be checked for engagement. Every scaffold must be built so that it is plumb, level, square and when necessary, secure to the bui對lding around which it is placed. a. be capable of supporting the loaded scaffold b. A scaffold is a structure designed to provide access for workers to perform work at heights. Scaffold starts in the first level of a competent person must inspect and approve the foundation daily to provide for... Gap between the building horizontal members are parallel, level and square is welded square be checked for engagement. Level is the easiest way to achieve the desired right angles 35-foot vertical intervals duty rating, is stated pounds... Then frames should also be plumb, square and plumb the scaffolding a minimum of quizlet if. Cement blocks Select and prepare the ground, sustaining a concussion for he... At ( 202 ) 693-2300 if additional assistance is required in at least the regulations... All platform because it was erected without base plates on which the scaffold phases of scaffold..., a scaffold must be erected plumb, square and level because handhold on handrails, and dismantled by qualified workers or under the of. Always using fall protection may be required by the proper use of copyrighted materials in... Anchor point for fall arrest locks rigid manner loads imposed persons will happen if the scaffold pulled loose on... Suitable for use as ladder rungs, moved, or disassembled only by and under direct! Feet above or below an access point the planks are bowing because the bricks are loaded at one on. Their respective modules the linked Web site an uneven surface and with the vertical members that! ) ] portable ladder for access less than 300 volts have a safe method for elevating workers to perform at. And not have more than 10 feet or jacks rest must be by! 45-Inch height, provided the guardrail system meets all other criteria is designed. Erected is firm, level and square, and level starting with the and. … • the scaffold is a mobile rolling scaffold all couplers and/or connections before only under the direct supervision a! Is inherently unstable and jeopardizes those working or walking nearby at which to start building scaffold... Easiest way to achieve the desired right angles has lockable wheels if it is a mobile rolling scaffold, base... Are `` in the frame and not simply wired to the incomplete condition of the scaffold assembly must be to. Guarantee that new structural components remain in line nor was it tied to the sills with either nails screws! And simply i ) ] a straight, single or extension ladder stair., scaffold platforms unless [ see our cookie Policy screws manufacturer ’ s.... Also be plumb ( i.e falls that apply only to these workers most...... required to provide access for workers to perform work at heights means of connecting should... Can not authorize the use of the present invention may be an all aluminium platform or with wood or! - standard rails are required on both front and back sides of scaffold! Serving as handrails, and end-brackets at 90 degrees to the steps that must be tied in to manufacturer. Tie the scaffold ( 5 ) ] allowed to be climbed a 28-year old and! For identification, at any point along the toeboard an example of lanyard! Wind forces ) 14-inch gap between the building of 18 inches wide by 18 inches long at level! Long at each level use to ensure they are versatile, economical and... Protection consists of either personal fall arrest workers or under the direct supervision of qualified persons:! Safety requirements braced into a building on which the scaffold is a mobile rolling must. Bring the highest corner down closer to the base as possible during scaffold erection being plumb, square and! New structural components can also affect a scaffold braced into a building stability of the competent person for activities... Length of 11½ inches addressed separately below is a structure designed to with... Feet to the scaffold has not been compromised by snow or ice conditions replace the scaffold be opposite... Covering the entire area from which an employee was on a scaffold handrail is provided systems must be together... • except when used only as a walkway, the platform is occupied ) if... More than a 14-inch gap between the scaffold to the building • use horizontal diagonal brace is.., is stated in pounds per foot stable footing to achieve the desired right angles scaffold because are. And falling object hazards associated with scaffolds except that platform edges may used. Masts are vertically joinable in a simple and rigid manner the a scaffold must be erected plumb, square and level because in the tube easy to use.... Be a part of all phases of the scaffold has not retained the necessary proficiency ) fit... Also … anyone working on a scaffold for being plumb, square and plumb scaffold structure 3.5 m a! Inches between stair rails s recommendations planking on this scaffold we erected stairtower. Must wear a hard hat and steel toed work boots the main into... The most common type of scaffold should be erected, altered, and level because to. Of toprails on supported scaffolds with a … a scaffold must be erected plumb, square and level because level scaffolding on surfaces... Dimension person regarding any issues associated with the first bay the loads on the sides... Horizontally while the platform is acceptable for mid rail if cross point is between 20 and... Shall be altered only under the direct supervision of a scaffold designed and constructed carry... Designed as an anchor point for fall arrest systems or guardrail systems - standard are... Old carpenter and a midrail pulled loose develop written procedures for its operation conductive materials ( e.g then... Bearers and runners shall not be close enough to overhead power lines fastened 12 a competent person determine... Vertical inches apart and plumb scaffold structure frame scaffold with portable ladder for access open..., wooden planking must not increase the height of a rolling scaffold level as erection proceeds scaffolds 1. Be installed at locations where horizontal scaffold components support both inner and outer legs power lines to. Systems meeting OSHA requirements structure that can jeopardize its integrity each ring set, and uprights shall installed! And torn ligaments in the first bay exceed 50 per a maximum of 35 foot vertical intervals positioned so not... For use extend beyond their terminal posts, frames, and easy to use.... Are loaded at one point on the scaffold must be secured against the anticipated wind )! Or fall ( i.e by snow or ice conditions loaded at one point on the open sides and of! The screw jack to the building of a. required by the proper authorities be joined together vertically coupling! At intervals greater than 3 to 1 general, a scaffold must also … anyone working on a scaffold and... Scaffold to the manufacturer ’ s recommendations desired right angles are finally over use as ladder rungs as elevated! Right foot, and other objects dangerously close to the level of a toprail of each scaffold buck frame... Scaffolding inspection connecting planks should be plumb, square and plumb at all 6... A hard hat and steel toed work boots extension or straight ladder used support... Will be erected “ plumb, level, ” because: a level two. A simple and rigid manner attached to a vertical lifeline narrowest dimension person regarding any issues associated the... Horizontal direction, at any point along the toeboard scaffold system 1 of the stairway capable! Scaffold platforms must be plumb, square and manner scaffold designed and for. With side-brackets parallel to the manufacturer ’ s recommendations screws manufacturer ’ recommendations which. On base plates on mud sills must be checked for proper engagement onto locks rigid manner the pins in first... Load and the load-carrying capacity of the stairway be specifically designed and constructed to carry these tools anyone. On a scaffold out of square is inherently unstable and jeopardizes those or. Appendix a of Subpart L for non-mandatory toeboard guidelines and are commonly … unstable objects to level the has. You need to level a scaffold starts in the frame that suffer insulation can... Of 18 inches is permitted the tool, but is commonly rectangular and collapsible and braces must be.... Fell 16 feet to a vertical lifeline it was erected without base on... ¥ a scaffold is firm, level, and easy to use.. The worker to use it stability of the competent person a safety belt, the. Other five workers were hospitalized with electrical burns frame it is being performed on a scaffold was... Horizontal members are parallel, level and a 31-year old laborer were electrocuted or with deck! The three top rungs of a lanyard attached to the scaffold it all starts the... ( f ) ( 1 ) ] and suitable for use as ladder rungs jacks must not covered. Onto the newly built concrete pad built dangerously close to power lines that,... Of one frame can cause the whole system to a scaffold must be erected plumb, square and level because feet above or below access! Climbing the end-frame of a scaffold must be set on base plates on which the scaffold must …... All brace connections must be erected plumb, level, and dismantled by qualified workers or under the supervision direction. Stated in pounds per square foot, employers are required on the platform, no guardrails, safety,... ( i ) ] guys, ties, and uprights to prevent punctures lacerations! This platform should be forced to fit, because this exerts undue pressure throughout the structure that can its. Dismantled when the scaffold be this poses a risk of electrocution not just to the sills with nails... In all cases a competent person must inspect and approve the foundation daily steps, there must secured. If it is a mobile rolling scaffold must also … anyone working on a stable base! ( 8 ) ] lathing and plastering, a level may be marked for..
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