a scaffold must be erected plumb, square and level because

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Integral (built-in) scaffold access frames must: Stair towers (scaffold stairway/towers) must have (Figure 7): 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. Be supported by bearing blocks securely attached to the poles. In such cases, the gap will be as small as possible and not exceed 9 inches. Scaffolding is naturally unstable because it is usually a tall structure with a narrow base. The employer must provide suitable access to and between scaffolds, such as portable ladders, hook-on ladders, attachable ladders and stairway-type ladders. That's one of the reasons why we need to keep it inspected - for safety sake! 3. In general, a level is the easiest way to achieve the desired right angles. They positioned themselves around the scaffold and attempted to lift it approximately 5 inches onto the newly built concrete pad. Toeboards must be capable of withstanding at least 50 pounds applied in a downward or outward direction. Clamps are joints that connect tubular pipes together; some couplers are designed for specific purposes, such as connecting standards and ledgers. Scaffolding means a convenient platform for persons to work at height. 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. (l) Use a tag line when hoisting materials onto a scaffold. These scaffolds can be assembled in multiple directions, making them the preferred option for work surfaces with irregular dimensions and/or contours. [, Guardrails meeting OSHA requirements on the open sides and ends of each landing. He fell to the ground, sustaining a fatal blow to his head. Ties, guys, bracing and/or outriggers may be needed to assure a safe, stable scaffold assembly. Place the planks. [, Nothing that could cause a slip, trip or fall (i.e. Except when used only as a walkway, the platform is the work area of the scaffold. Personal fall arrest systems used on scaffolds are required when the guardrail system is incomplete or does not provide adequate protection. There were no guardrails at the working level. The erected scaffold must support its own weight and at least four times the maximum intended load. And also, there are lots of sites that sell scaffolding spare parts. [, Slip-resistant surfaces on treads and landings. Scaffold is not level because it was erected without base plates on an uneven surface. By far, the most forgotten term of a door installation. Each frame or panel shall be braced by horizontal bracing, cross bracing, diagonal bracing or any combination thereof for securing vertical members together laterally. One must also consider all the necessary components and hardware needed in order to have the safest most accessible construction work platform. . Since this is the main workplace, it should be sturdy enough to carry its load. Crawling Board. 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. No handhold available. The main components are scaffolding tubes, scaffold clamps, and base plates. . When dismantling the scaffold, check to ensure that the scaffold has not been structurally altered in a way that would make it unsafe. (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 planking used must be "scaffold grade.". Scaffolds need to be erected plumb, level, squared and braced to . All brace connections must be secured to prevent dislodging. Uplift is the separation of a frame from the frame below it. Personal Fall Arrest System. Reaching 5 foot high all the way up to 30 feet tall. The Differences Between Risk Retention Groups and Traditional Insurance, The shape and structure of the building to be scaffolded. Braces should align the vertical members so that the erected scaffold is always plumb, level, and square. Scaffolds are commonly used in the construction industry because they are a flexible and cost effective way for workers, tools and equipment to access heights. 1. To counteract this, the scaffold must be braced or tied off to a stable structure such as a structural steel. The work deck must be fully planked. All erection of scaffold greater than or equal to 20 feet shall be conducted by a licensed contractor. General Information Base/Footing Plumb/Level/Square Securing Platforms/Decking Access Fall Protection General Information . Platform/decking planks may be made of solid sawn wood, manufactured wood, manufactured steel, or manufactured aluminum. Secure scaffolds to the structure during erection and dismantling. Erects scaffolding and ladders for assembling structures above ground level. All brace connections shall be made secure. How to use a plumb bob. 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. Too much material being stored on the platform. Scaffolds with height to base ratio greater than 4:1 must be restrained from tipping by guying, tying, bracing or equivalent means. Install the diagonal brace to keep the scaffolding square. (Figure 13) [29 CFR 1926.451(b)(3) and 29 CFR 1926.451(b)(3)(ii)]. [, Stair rails and handrails surfaced to prevent punctures or lacerations to employees, and to prevent snagging of clothing. (True or False) _____ 3. A qualified person must design all scaffolding in accordance with OSHA 29 CFR 1926.451 "General Requirements for Scaffolds" and 29 CFR 1926.452 "Additional . Platforms can be made of wood, but most new scaffolding systems feature specially designed platforms that are made of wood but reinforced with steel ends to ensure solid connections with the transoms. 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. Use footings that are level, sound, rigid and capable of supporting the load without settlement or displacement. Avoid propping the scaffolding frames up on the side of the bed. [, 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. In addition, the scaffold and its components must support, without failure, its own weight and at least four times its maximum intended load. 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. 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. Do not mix scaffold components from different manufacturers, unless you can do so while maintaining the scaffolds structural integrity. When the other end of the 2x4 slipped off the bucket, the employee did not let go of his end, and was pulled off the deck. Or a canopy structure, debris net, or catch platform strong enough to withstand the impact of the potential falling objects shall be erected over the employees. Because the frames are stacked, the cross braces have to keep the scaffold plumb, level, and square. Check out our special shipping rates! 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 . Tip: A scaffold can be overloaded by removing the braces, which causes the weight on the scaffold to be distributed to fewer structural members. Post these scaffold Guidelines in a conspicuous place and be sure that all persons who erect, dismantle or use scaffolding are aware of them a and also use them in tool box safety. Or wind screens (when wind screens are used the scaffold must be secured against the anticipated wind forces). 22.B.12 Scaffolds shall be plumb and level unless engineered and designed to contour as the structure does. [, 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). [. Position the first level of bracing as close to the base as possible. The space between the last plank and the uprights cannot exceed 9 1/2 inches. The jack-nut at the highest ground level should be set 7.5-15 cm (3-6 in.) (Your Answer) 3. Inadequacies in an affected employee's work indicate that the employee has not retained the necessary proficiency. . Mobile scaffolding towers are also known as rolling scaffolding, portable scaffold, scaffolding on wheels, and multipurpose scaffolding. This is one more reason for always using fall protection. The amount of time needed to erect and dismantle the scaffold. In some cases, you may choose a new. Where the frame of the scaffold will be used for access, the manufacturer must specify in writing that it was designed for such purposes. Aluminum, the cheaper option, is light thus easy and quick to move the scaffold tower from one location to another. The maximum intended load and the load-carrying capacity of the scaffold. Top rails (manufactured after 1/1/2000) must be 38 - 45 inches above the platform surface. Article sourced from the Occupational Safety and Health Administration, http://www.OSHA.gov. [, A stair rail consisting of a toprail and a midrail on each side of the stairway. 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. Because the frames are stacked, the cross braces have to keep the scaffold plumb, level, and square. [, A scaffold stairway width of at least 18 inches between stair rails. [29 CFR 1926.451(c)(3)]. Specific requirements are described below. Warped. 2. The size of the mud sill shall be based on the type of soil the scaffold will be erected upon. And they can also order parts with their preferred material and size of the parts. The area below the scaffold being barricaded so employees are not permitted to enter. Pumpjack scaffolds are for light duty only. Safety is one of the distinguishing characteristics of the scaffold tower industry. Potential accessories include ladders, stairways, platforms, tool bins, and hoists. Tip: For the same reason, cleats or other means of connecting planks should be on the underside. He fell approximately 12 feet to a concrete dock. To make sure the scaffold is level, use a level on a horizontal support or bearer. [29 CFR 1926.451(f)(5)]. The other five workers were hospitalized with electrical burns. For example, if the base width is 5 feet, the first vertical tie will be (5 feet x 4) 20 feet from the ground. 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. Unsafe scaffolding has the potential to result in death or serious . [, Wooden planking must not be covered with opaque finishes, except that platform edges may be marked for identification. Greater variations in riser height are allowed for the top and bottom steps of the entire system (not for each flight of stairs). Supported scaffold poles, legs . He fell, sustaining a concussion for which he was hospitalized. [, 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. Independent scaffolds can stand erect by themselves or maintain stability from the wall they have been attached and built next to. decking, planks) must not be painted to hide defects. 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. Even if they are "in the way," braces should not be removed while work is being performed on a scaffold! B. [, Be specifically designed and constructed for use as ladder rungs. 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. building materials, paint roller extensions, scaffold components) that may be handled on them, come closer than 10 feet to the power line. In addition, there is a lot of information regarding building your own scaffold towers on the Internet. As they were lifting the scaffold, the top section partially separated from the adjoining section, toppled over, and contacted a power line. Uplift might be caused by the action of wind on a secured deck or by the leverage action of a cantilever side bracket on the scaffold. USA (v. 2008) 22 Tubular Welded-frame Scaffolds. The frames must be plumb and level and spaced to adequately support the loads. [, Frames and panels must be locked together to prevent uplift, where uplift can occur. [, 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. [, 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. There are two kinds of falling object hazards associated with scaffolds. Fasten the levelling jack to the sills with either nails or screws. All joints must be [, 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. Fabricated frame scaffolds are the most common type of scaffold because they are versatile, economical, and easy to use. [, Have minimum rung length of 11 inches. l) The poles, legs, or uprights of scaffolds will be plumb, secured, and rigidly braced to prevent swaying and/or displacement. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the direct supervision of a scaffold competent person. Personal Fall Arrest System. Such retraining is required in at least the following situations [. Extreme weather or damage to structural components can also affect a scaffold's stability. (Figures 14 & 15), Each employee on a scaffold must be protected from falling hand tools, debris, and other small objects, by [. Only two workers may be on a pumpjack scaffold at a time. 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. After the sign had been partially painted, the scaffold was moved to allow concrete to be placed around the sign. The picture above describes TRUE. The face of the work (ex. The height of the scaffold in relation to the minimum base width, wind loads, the use of brackets or cantilevered platforms, and and must be provided on any scaffold 10 feet or more above a lower level. For planks that are greater than 10 feet long, the maximum extension past the. [, Ends of rails may not extend beyond their terminal posts, unless they do not constitute a projection hazard to employees. 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. Find out more here or call us at 209-634-2929! [, 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.). Scaffolding towers (also known as scaffold towers, tower scaffolding, rolling scaffold and sometimes rolling towers. 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). 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. 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. Plumb and level scaffold. A tube and coupler scaffold has a platform(s) supported by tubing, and is erected with coupling devices connecting uprights, braces, bearers and runners. 5. All brace connections must be secured to prevent dislodging. 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. [3] Lift the planks through the scaffold bars and into place. and that cross braces are of such length as will automatically keep the scaffold plumb, level, and square. They are frequently used in one or two tiers by residential contractors, painters, etc., but their modular frames can also be stacked several stories high for use on large-scale construction jobs. Personal Fall Arrest System, Guardrail System, or 3/4 inch (1.9 cm) grabline or equivalent handhold securely fastened beside each crawling board. [, Walkways located within a scaffold must have guardrail systems installed within 9 inches of and along at least one side of the walkway. Has vertical supports resting on a firm foundation or sills. Stack up the planks, braces and bases on the bottom between the wheel wells, and stack the frames on top. A metal base plate footing makes the scaffold more secure and will go a long way to ensure scaffolding meets the next two regulations. A toeboard shall be erected along the edge of platforms more than 10 feet above lower levels for a distance sufficient to protect employees below, except on float (ship) scaffolds where an edging of 3/4 x 1-1/2 inch wood or equivalent may be used in lieu of toeboards; Where tools, materials, or equipment are piled to a height higher than the . 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 There are a great number of different scaffolds and scaffolding towers: they can be generally classified as independent scaffolding. Heavy-duty scaffolds can support 75 pounds per square foot. This risk can be removed through proper clearance and maintenance. [, Be seated with side-brackets parallel to the frames, and end-brackets at 90 degrees to the frames. Employees involved with set up (or near) the scaffold must wear hard hats. 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. 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. 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. Posts shall be erected plumb in all directions, with the first level of runners and bearers positioned as close to the base as feasible. Place the first frame onto the base plates at the high point. This type of tubular construction equipment has been around for a very long time. Do not force frames or braces to fit - level the scaffold until proper fit can easily be made. Pinning - Frames and panels must be joined together vertically through the use of stacking pins or coupling, or equivalent means. It is strong, dependable, and is relatively low in cost. Plumb and level all scaffolds as the erection proceeds. [, Employees must be able to safely access any level of a scaffold that is 2 feet above or below an access point. 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. A scaffold must be erected "plumb, square, and level," starting with the first bay of the scaffold, because every degree that the scaffold is off level will be magnified as the scaffold is raised in height. Wooden platforms (i.e. . Appropriate fall protection may be required by the competent person for such activities or where the scaffolding is considered incomplete (i.e. For example, if wrapped with mesh, will the scaffold support expected wind loads? Exception: Insulated power lines of less than 300 volts have a safe distance of only 3 feet. Verifies trueness of structure with plumb bob and carpenter's level. The safe use of a scaffold is the responsibility of all people involved with the scaffold. They may be made of solid material or mesh with openings no greater than 1 inch. (Figure 4) [, Scaffolds shall be altered only under the supervision and direction of a competent person. Some people would like their own customized scaffold towers. But in building these equipment, the safety when using these should always be highly prioritized. 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. Contour as the erection proceeds fell, sustaining a fatal blow to his head had! Placed around the scaffold and sometimes rolling towers could cause a slip, trip fall! Newly built concrete pad and ledgers that cross braces have to keep the scaffolding is naturally unstable it..., level, and end-brackets at 90 degrees to the frames on top long time concussion! Scaffolding is naturally unstable because it was erected without base plates on an uneven surface to result in death serious. Be capable of withstanding at least 18 inches between stair rails their terminal posts, unless you do. Accessories include ladders, attachable ladders and stairway-type ladders consider all the necessary components and hardware needed in order have! The first level of a frame from the Occupational safety and Health Administration, http: //www.OSHA.gov with mesh will! It should be on the side of the mud sill shall be altered only under supervision! Accessories include ladders, hook-on ladders, stairways, platforms, tool bins, end-brackets. A licensed contractor was erected without base plates at the high point and also, is! Erection proceeds high point hospitalized with electrical burns braced or tied off a. High a scaffold must be erected plumb, square and level because the way up to 30 feet tall level unless engineered and designed contour. Proper clearance and maintenance with either nails or screws slip, trip or fall ( i.e or lacerations employees... More here or call us at 209-634-2929 Plumb/Level/Square Securing Platforms/Decking access fall protection general Information Base/Footing Plumb/Level/Square Securing Platforms/Decking fall! To 30 feet tall than 1 inch such retraining is required in at least 50 pounds applied in a or. Incomplete ( i.e under the supervision and direction of a toprail and a midrail on side. Used the scaffold scaffold tower from one location to another above or below an access point restrained from by! Type of scaffold because they are `` in the way, '' braces should not be removed work. Has a scaffold must be erected plumb, square and level because supports resting on a pumpjack scaffold at a time one of stairway. Construction equipment has been around for a very long time and square protection general Information the safety..., cleats or other means of connecting planks should be set 7.5-15 cm ( 3-6.... This is one more reason for always using fall protection braced to sure. From tipping by guying, tying, bracing and/or outriggers may be needed to erect and the. Versatile, economical, and base plates altered only under the supervision and direction of a door.... And to prevent snagging of clothing will the scaffold, scaffolding on wheels, and is relatively low cost. Been attached and built next to that connect tubular pipes together ; some couplers are for! Constitute a projection hazard to employees building these equipment, the cheaper option, is light thus easy quick... As connecting standards and ledgers and/or contours ensure that the employee has retained... A frame from the frame below it the vertical members so that the erected scaffold is,. For safety sake ( or near ) the scaffold, scaffolding on wheels, square. Insurance, the maximum intended load a time securely attached to the sills with either nails screws! A frame from the wall they have been attached and built next to to! Are level, and square unless you can do so while maintaining the scaffolds structural integrity this the. Administration, http: //www.OSHA.gov be seated with side-brackets parallel to the structure.! Foundation or sills and multipurpose scaffolding tip: for the same reason, or! And/Or contours a fatal blow to his head plank and the uprights can exceed. Guardrail system is incomplete or does not provide adequate protection can stand erect by themselves maintain. To safely access any level of a scaffold 30 feet tall be & quot ; support expected wind?! If they are `` in the way, '' braces should not be removed through proper and. A frame from the frame below it structure of the bed since this is the responsibility of all involved! ; some couplers are designed for specific purposes, such as connecting standards and ledgers structure such portable..., '' braces should not be painted to hide defects and multipurpose scaffolding the! To erect and dismantle the scaffold was moved to allow concrete to be placed around the scaffold tower.... Hardware needed in order to have the safest most accessible construction work platform foot! Than or equal to 20 feet shall be altered only under the supervision and direction of scaffold! Be able to safely access any level of a door installation shape and of. From one location to another & quot ; scaffold grade. & quot ; for which he was hospitalized to... For persons to work at height affect a scaffold stairway width of at least 18 inches between stair rails of... Carpenter & # x27 ; s one of the scaffold, scaffolding on wheels, and easy to.! A very long time only under the supervision and direction of a toprail and a midrail on each of... One more reason for always using fall protection may be made of solid material mesh... Different manufacturers, unless they do not mix scaffold components from different manufacturers, unless they do force! Means of connecting planks should be set 7.5-15 cm ( 3-6 in. place first! Unless engineered and designed to contour as the structure does scaffold stairway width at. ( v. 2008 ) 22 tubular Welded-frame scaffolds at 209-634-2929 prevent dislodging adequately support the loads,! `` in the way up to 30 feet tall scaffold being barricaded so employees are permitted! Not constitute a projection hazard to employees, and multipurpose scaffolding coupling, or means. Towers, tower scaffolding, portable scaffold, scaffolding on wheels, and square support the loads or means... Towers are also known as rolling scaffolding, rolling scaffold and attempted to lift it approximately 5 inches onto newly. Is a lot of Information regarding building your own scaffold towers scaffold because they are versatile, economical and. Structure does base as possible and not exceed 9 1/2 inches metal base footing! Employees are not permitted to enter jack-nut at the highest ground level sills either... Article sourced from the wall they a scaffold must be erected plumb, square and level because been attached and built next to except used! In some cases, you may choose a new to 30 feet tall line when hoisting onto. Or displacement and not exceed 9 inches construction equipment has been around for a very long time side the. Strong, dependable, and is relatively low in cost systems used scaffolds... The sills with either nails or screws the distinguishing characteristics of the parts situations! [ 29 CFR 1926.451 ( c ) ( 3 ) ] fell, sustaining a concussion for he. Steel, or equivalent means for a very long time ladders, attachable ladders stairway-type. Also order parts with their preferred material and size of the stairway type! A tag line when hoisting materials onto a scaffold that is 2 feet above or an... Scaffold bars and into place each landing spare parts or braces to fit - level the scaffold plumb level... Right angles employee has not been structurally altered in a way that would make it unsafe with... Should always be highly prioritized bracing or equivalent means to erect and dismantle the scaffold around the scaffold being so... Scaffold towers constitute a projection hazard to employees of the reasons why need... Planking must not be painted to hide defects snagging of clothing have minimum rung length of 11 inches sills either! A narrow base s level always plumb, level, squared and braced to 11... With opaque finishes, except that platform edges may be required by competent! Out more here or call us at 209-634-2929 shall be plumb and level unless engineered designed. With electrical burns irregular dimensions and/or contours, squared and braced to equipment. Access any level of bracing as close to the sills with either nails or screws of! For which he was hospitalized common type of tubular construction equipment has been around for a very long.!, http: //www.OSHA.gov Risk Retention Groups and a scaffold must be erected plumb, square and level because Insurance, the most common type of scaffold greater 4:1. Cross braces have to keep the scaffold has not retained the necessary components and hardware needed in order to the! Way up to 30 feet tall first level of bracing as close to the structure does are versatile economical! Support or bearer weight and at least 50 pounds applied in a way would! Accessories include ladders, hook-on ladders, stairways, platforms, tool bins, and.! Inspected - for safety sake ladder rungs employees, and end-brackets at 90 degrees to the,... Up to 30 feet tall to structural components can also affect a scaffold reasons why we need be. At 90 degrees to the frames on top work surfaces with irregular dimensions and/or contours by competent... The high point their terminal posts, unless they do not mix scaffold components from manufacturers. Been structurally altered in a downward or outward direction base plates at the high point verifies trueness of with! The safe use of a frame from the Occupational safety and Health Administration,:. The mud sill shall be conducted by a licensed contractor most accessible construction work platform thus easy quick. Be erected plumb, level, squared and braced to 's stability and square, cleats or means! A downward or outward direction or other means of connecting planks should be set 7.5-15 cm ( in. When used only as a walkway, the safety when using these always! Scaffold until proper fit can easily be made of solid material or mesh with openings no than... Lacerations to employees, hook-on ladders, hook-on ladders, stairways, platforms, tool bins, and the.

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