scaffolding or scaffolds must ensure, so far as is reasonably practicable, all workplace activity relating to the plant or structure including its decommissioning or dismantling is without risks to health or safety. • Providing direction to those employees who may be assisting them in the erecting or dismantling of a scaffold. A qualified person has the right background such as education, degree, certification or professional standing that shows they are an expert in designing safe scaffolding. The size of the mud sill shall be based on the type of soil the scaffold will be erected upon.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. Scaffolds can be built on catwalks, on the space shuttle and anything else that someone may have to work on. In other words—they know all there is to know about scaffolds! However, pouring sidewalks, slabs, and other elements early in the project means that you’ll have solid, level surfaces for scaffolds. That is why hazard analysis needs to be an ongoing process. The term “little known,” is subjective at best. For starters, any scaffold should have a base of some sort. As an example, a yellow tag may mean that the workers need to be aware of a specific trip hazard, or may need to use fall protection. Failure to do so makes the scaffold less stable and, while it may not topple, it may sway or move enough to knock someone off the platform. In OSHA’s eyes, if you fail to document that you performed the inspection and placed the tag, that never took place. One way to enhance the safety of scaffolds is to consider the need for scaffolding when staging construction projects. All wood planking shall be selected for scaffold plank use as recognized … Supported scaffolds with a height to base width ratio of more than 4:1 must be restrained by guying, tying, bracing, or an equivalent means. But the more important reason is to ensure their safety. (2) You must make sure supported scaffold poles, legs, posts, frames, and uprights, bear on base plates that rest on: (a) Mudsills; or (b) Other firm foundations such as concrete or dry, compacted soil. Competent Persons can have other duties, such as working on the scaffold or other supervisory duties and verification of fall arrest anchor points. This is actually not correct. A platform that becomes wet or icy creates a risk for skips and falls. Read and follow all directions That brings us to screw jack height. Safety Management Group offers a full complement of state-of-the-art services delivered through a wide variety of channels addressing industry specific issues. Learn More, By Jordan Hollingsworth, MS, ASP, CHST, CHSP, CRIS® © 2020 Masonry Magazine masonrymagazine.com All rights reserved. scaffold shall be protected by both a personal fall arrest system and a guardrail. Supported scaffolds' poles, legs, posts, frames, and uprights must bear on base plates and mud sills, or other adequate firm foundation. Going beyond that limit – even for a task that takes just a few minutes – is inviting trouble. An adequate foundation is one that, like base plates on mud sills, will prevent the scaffold from settling into the ground. OSHA 10-Hour Construction Course: Module 5 – Scaffolds Page 1 of 22OSHA MODULE 5 – ScaffoldsLearning ObjectivesUpon completion of the lesson, participants will be able to: • Name the three types of scaffolds and describe their main characteristics • List at least three of the four main hazards to which persons working on a scaffold … Check the hazards at the beginning of every shift Unless the manufacturer specifically indicates that the components are compatible and can work together, don’t mix them. The top rail should be able to withstand 200 pounds of downward and outward force placed upon it. Now, hopefully you already knew all of this, but as you know, the three steps to remembering are Repetition, Repetition, Repetition! Another item that should be noted is that you never increase the scaffold height by adding boxes, barrels, concrete block, brick etc… to the platform. Here’s one that you may not know; if a board is 10-foot-long or less you cannot have more than 12 inches of the end of the board over it support. Scaffolds must always be set on a firm foundation, so if the surface below the legs doesn’t offer sufficient strength to withstand the weight and stress, steps must be taken to compensate. Under safety regulations, a competent person is responsible for overseeing and coordinating all aspects of scaffolding. A red tag makes it clear that nobody can occupy the scaffold because it’s not ready for use, or because there’s a problem with it (or the environment). 1926.451(c) Supported scaffolds (contd) Scaffold platforms must be fully planked ; 19 1926.451(c) Supported scaffolds (contd) Must bear on adequate foundations ; Unstable objects will not be used as working platforms ; Plumbed and braced ; 20 1926.451(d) Suspension scaffolds. Any minor damage to those surfaces that is caused by the scaffolds is easy to repair, and the cost of those repairs is usually clearly offset by the time and trouble saved when erecting scaffolds — not to mention the substantially lower risk of injury resulting from a collapse. Regardless of the tissue type, a number of key considerations are important when designing or determining the suitability of a scaffold for use in tissue engineering: (i)BiocompatibilityThe very first criterion of any scaffold for tissue engineering is that it must be biocompatible; cells must adhere, funct… Scaffolds must be inspected at least once a day by a competent person. Competent Persons shall be physically present at the scaffold during such work. Unstable objects, such as bricks, cinder blocks, buckets, scrap lumber, etc., shall not be used to support or level scaffolds. Any bracing must be properly secured to ensure that it will not become loose once under stress. That’s why proper training is critically important for every worker who erects, inspects, maintains, or uses scaffolding on a worksite. Access to and from the scaffold can create its own set of hazards, because the potential for slips and falls increases as workers ascend or descend from the scaffold. OSHA does allow a ladder to be used on top of the scaffold if many stipulations are met, but this is not a suggested practice. timber scaffolds must be rattan or such other material as approved in writing by the chief inspector. An “adequate foundation” is what OSHA says that every scaffold must have. Use and document a tagging system OSHA gives a little leeway in the top rail; it can be between 38 and 45 inches in height. Training should be updated whenever substantial changes are made to the scaffold’s structure or to the tasks that are being performed. Hook-on or attachable ladders must be designed specifically for the scaffold and positioned so that they do not cause it to tip. Icicles that form on portions of the structure above the scaffold may thaw and suddenly drop on workers. As many as 50 workers actually die. That height for the first rung is actually quite high, and most people prefer sitting the ladder on the ground so they’re not required to have such a tall first step. A couple of points about scaffold access. Prior to assembly, a qualified person must design the scaffold and set the specifications for using it. Another thing that most people that are reading this are aware of is that the ladder must reach at least 3 feet above the scaffold platform. Re … They are the platforms and climbing devices we describe as scaffolding. At the beginning of each shift, a competent person inspects the scaffold and attaches one of three tags. structure. Even the most carefully engineered and assembled scaffold will be unsafe if it doesn’t have a firm foundation. Any scaffold that is more than 125 feet in height above the base must be designed by a registered professional engineer. This is for several reasons, but one main reason is so that small items like wrenches, wall ties, jointers, etc. Generally, the adequacy of a foundation to support a scaffold cannot be determined in the abstract because of the numerous factors which may exist at a work site. When performing those inspections, focus on the tasks that will be performed that day, and verify that the scaffold will provide a safe platform. • Ensuring that a tag is placed on scaffold indicating its current condition (i.e. In the introductory text to §1926.451(c)(2), the revised standard requires base plates (and mud sills or other adequate firm foundation) at all times now for support scaffold poles, legs, posts, frames, and uprights. Pump Jack Scaffold. An “adequate foundation” is what OSHA says that every scaffold must have. It isn’t that scaffolds are any more or less inherently dangerous than other aspects of worksites. Although they may not get the attention they deserve from the workers who use them, the people who are responsible for those workers’ safety recognize the danger. That requirement reflects the additional hazards and structural stress involved with such heights. While they may be ordinary and utilitarian, they tend to fail in dramatic, newsworthy ways. Finally, weather conditions can create or contribute to hazards. Even if the scaffold is only out of level by a very small amount, it is not considered safe. 1926.451(c)(2) 22.B.14 Working levels of work platforms shall be fully planked or decked. 1926.451(g)(1) • Guardrail height—The height of the toprail for scaffolds manufactured and placed in service after January 1, 2000 must be between 38 inches (0.9 meters) and 45 inches (1.2 meters). Scaffolding. Construction sites are places of constant change. Scaffolds have been used for tissue engineering such as bone, cartilage, ligament, skin, vascular tissues, neural tissues, and skeletal muscle and as vehicle for the controlled delivery of drugs, proteins, and DNA. Many of you being in the construction industry, maybe very well aware of most of these OSHA guidelines for safe scaffolding. When scaffold platforms are more than 2 feet above or below a point of access, access is required to be provided. If the structure of the scaffold or its surrounding area have been altered, or if weather conditions change, it should be re-inspected. Above all: respect scaffolding Each manufacturer designs his screw jack differently, and some design them so that they can be raised higher than 12 inches. It must have a base plate or screw jack at a minimum. That isn’t the case. They need to be cognizant of fall-protection requirements and other safety features such as toe boards. Supported scaffolds must bear on base plates and mud sills or other adequate firm foundation. Create a firm foundation D. Suspension Scaffolds • Before a scaffold is used, the competent person shall evaluate all direct connections. What I will try to do in this article is to address both things that are commonly found on any construction site and not so obscure that it would never be utilized. A Competent Person shall be available on site at any time scaffolding is in use in the event conditions change or the scaffolding is moved or modified. will not fall through the gap and strike someone below. A scaffold that was safe a month ago may have become unsafe because of something that was constructed nearby, or because of a task that is now being performed in an adjacent area. A yellow tag sends the message that the workers can use the scaffold only under certain conditions. Interchanging components from other systems or manufacturers may look safe, but it also may compromise the scaffold’s structural integrity. They should be taught to look around to identify adjacent hazards, such as moving equipment, electrical wires, or hot pipes. Simply tying the scaffold in place with wire may be an accepted practice among workers, but it violates OSHA regulations. Any bracing must be properly secured to ensure that it will not become loose once under stress. There are many different foundations out there; there could be dirt, rock, mud, water, asphalt, grass, a roof, a metal top to a tank or concrete. Workers take them for granted, failing to give them a second thought. Here at SoCal Removal we have implement a stringent policy to ensure that employees are not exposed to hazards while working on or with scaffolding or elevated work platforms. One reason is that OSHA demands it. Additionally, extreme weather conditions may rule out the use of an otherwise safe scaffold. However, that rule applies only when the scaffold has been properly assembled, has been set on the correct base, and is in plumb. The standard recognizes that certain foundations may be of adequate firmness to support a scaffold without the use of mud sills. Scaffolds must be exactly plum and exactly level for it to be considered safe. For example, the competent person has to decide whether the workers who are assembling or dismantling the scaffold will need fall protection while performing those tasks. as a midrail, it must be between 20 inches (0.5 meters) and 30 inches (0.8 m) above the work platform. 22.B.14 Working levels of work platforms shall be fully planked or decked. Words: Zach Everett, Corporate Safety Director Brazos Masonry Inc., Legacy Masonry Inc. HomeArticlesAdvertiseSubscribeVideosContactTerms of ServicePrivacy Policy, Mason Contractors Association of America1481 Merchant DriveAlgonquin, IL 60102, Phone: 800-536-2225 | 224-678-9709Fax: 224-678-9714. such as tie-ins, as the assembly progresses. plus 4 times the applied or transmitted load on the scaffold without failure. Note that the list includes workers who “use” scaffolding. Placing the tag is only part of the process. a. Another not so commonly-known allowance is that a cross brace can be used for a mid-rail if the crossing point of the brace is between 20 and 30 inches above the platform and the ends of the cross brace are no more than 48 inches apart. That’s why the companies that design and build them invest so heavily in engineering – and why it’s so important to ensure that the people entrusted to oversee them on jobsites receive adequate training. Finally, while the scaffold is being erected or dismantled, the workers who are performing that task need a safe access. 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