The frames must be plumb and level and spaced to adequately support the loads. potential hazards that employers and workers need to be aware of so they can take the Why? Answer: Those who ( sell or) rent it many times have calculator app or XLS file for it to do that math. Bearers shall extend a minimum of 3 inches (7.6 cm) over the outside edges of runners. 7. Float Scaffold. aluminum, or less commonly, wood. Which of the following is an element of a hearing conservation program? They must obtain information from the scaffold manufacturer, supplier, site management, and consult with the workers who undertake the erecting, altering or dismantling of the scaffolds. Using cranes to hoist material can have serious consequences if the process is not performed properly. Do not sell or share my personal information. We need to follow scaffolding safety procedures. USA (v. 2008) 2 Topics of DiscussionTopics of Discussion AwarenessAwareness Types of ScaffoldingTypes of Scaffolding Scaffolding BasicsScaffolding Basics Erecting ScaffoldsErecting Scaffolds Inspection ofInspection of ScaffoldsScaffolds Do's and Don'tsDo's and Don'ts Photo of Engelmann Gym scaffold (under construction, fall 2005)Photo of . Engineering and Administrative Controls. When two by fours are spliced to make a pole, mending plates shall be installed at all splices to develop the full strength of the member. Not tied. Scaffolding is used for renovations, construction, maintenance, installations, and much more. Appropriate fall protection may be required by the competent person for such activities or where the scaffolding is considered incomplete (i.e. common. Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. Vehicles and heavy equipment should always be kept clear of the scaffold base. Electricity travels in closed circuits, and its normal route is through a conductor. When platforms are being moved to the next level, the existing platform shall be left undisturbed until the new bearers have been set in place and braced, prior to receiving the new platforms. Scaffolds must be erected in accordance with design and/or manufacturers' recommendations. By whitelisting SlideShare on your ad-blocker, you are supporting our community of content creators. Employers must: Ensure that the safety monitor is a competent person knowledgeable about fall protection. Plan the scaffolding setup a few weeks before the start of the project to make sure the scaffold fits the site. A staging area is available. Electrocution, electric shock, burns, indirect (e.g., a fall from a ladder). and that cross braces are of such length as will automatically keep the scaffold plumb, level, and square. If bridges are not used, passage may be made from one platform to another only when the platforms are at the same height and are abutting. The SlideShare family just got bigger. D. Alertness and reaction time testing. We thoroughly check each answer to a question to provide you with the most correct answers. ", "Form scaffolds and carpenters' bracket scaffolds. Your IP: 143.244.138.144, Requested URL: www.concreteconstruction.net/_view-object?id=00000154-24cb-db06-a1fe-77cb16a60000, User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36. B. Bamboo scaffolds A metal base plate footing makes the scaffold more secure and will go a long way to ensure scaffolding meets the next two regulations. Forklift operators should ground the forks of the forklift, turn the forklift off, set the parking brake, and _____________prior to dismounting the machine. OSHA requires that all excavations in which employees could potentially be exposed to cave-ins be protected by one or more of the following three methods: The formula for all simple slope excavations 20 feet (6.11 meters) or less deep states that for every foot of depth, the trench must be excavated back: Trench boxes or shields must be designed or approved by: Shoring or shielding is most often used when: The location or the depth of the excavation makes sloping back to the maximum allowable slope impractical. A good time to perform these inspections is at the start of the workday to ensure the area is clear for that day's shift. True or False: Once a fall protection device has been inspected by a competent person and deemed safe for use by an employee, it is up to the employee to inspect it regularly and ensure that it still meets OSHA requirements. B. Add lukewarm water to two plastic cups. Activate your 30 day free trialto continue reading. A. SCAFFOLD BASE MUST BE SET ON AN ADEQUATE SILL OR PAD to prevent slipping or sinking and fixed thereto where required. Activate your 30 day free trialto unlock unlimited reading. Personal Fall Arrest System, Guardrail System, or 3/4 inch (1.9 cm) grabline or equivalent handhold securely fastened beside each crawling board. Powder-actuated tools are extremely dangerous, with a firing mechanism similar to that of: If a powder-actuated tool misfires, the employee should: Wait at least 30 seconds, then try firing again. D. All of the above. fabricated frame scaffold, the mobile scaffold, the tube and coupler scaffold, the system Faults: Damaged. B. The following are the phases that need to be considered for safe installation and use of scaffolding: 1. To prevent their displacement, platform units shall be nailed, bolted, or otherwise secured to outriggers. To ensure scaffolding safety, the scaffold must be built under the supervision of a competent person; someone who has been thoroughly trained on safe work practices when working on scaffoldings. What Is The Molar Mass Of Calcium Chloride? prevented every year. Splice plates of other materials of equivalent strength may be used. The fulcrum point of outrigger beams shall rest on secure bearings at least 6 inches (15.2 cm) in each horizontal dimension. Prevent An Expressway Emergency By Merging Without _____. Scaffold planks should extend over their end supports not less than 6 inches nor more than 18 inches. Add several tablespoons of table salt to one cup and stir. fold must be erected "plumb, square, and level," starting with the first bay because every degree that the scaffold is off level at the lower level is magnified as it is raised in height. Pole scaffolds over 60 feet in height shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with that design. One who is capable of identifying existing and predictable hazards in the surroundings, or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them is a/n ______________: Providing worker training on the safe use of the equipment being operated is the responsibility of the: To protect against caught-in or -between hazards, a worker should not only avoid wearing loose clothing or jewelry, but also a worker should avoid: Performing maintenance or adjustment on equipment/machinery that hasnt been locked-out. In the United States and Canada, most scaffolds found at jobsites are made of steel, The scaffold should be plumb, level and square. Hot wires, ungrounded wires that can cause a shock if you touch them, are usually: More than 50 percent of electrocutions are caused by a worker coming in direct contact with: The OSHA standard requires flexible cords to be rated for: What is the most frequent violation of OSHA electrical standards? C. Explosives A scaffold is a temporary structure that supports access or working platforms. Materials being hoisted onto a scaffold must Cross-bracing is required on both front and back sides of each scaffold buck or frame. Scaffolding Injuries Approximately 2.3 million construction workers work on scaffolds regularly. Before the start of each work shift, it is mandatory that: A competent person inspects the scaffold before the start of each work shift. B. Supported scaffold poles, legs . SCAFFOLDS MUST BE ERECTED IN ACCORDANCE WITH DESIGN AND/OR MANUFACTURERS' RECOMMENDATIONS. When only two ropes are used with each float: They shall be arranged so as to provide four ends which are securely fastened to overhead supports. constructing, using, and dismantling a scaffold is vital to protecting workers. Scaffolds must be plumb, level, and squared. D. Static electricity gathers outside the circuit. Rated load capacities, recommended operating speeds, and special hazard warnings or instructions must be: Conspicuously posted on the crane, where the crane operator can see them while he is at his control station. Provide guards on power tools and other equipment with moving parts. 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. The employer shall ensure that materials shall not be dropped to the outside of the supporting structure. ", "Step, platform, and trestle ladder scaffolds. On straight run scaffolds, longitudinal bracing across the inner and outer rows of posts shall be installed diagonally in both directions, and shall extend from the base of the end posts upward to the top of the scaffold at approximately a 45 degree angle. Name the three types of scaffolds and describe their main characteristics Finally, while the scaffold is being erected or dismantled, the workers who are performing that task need a safe access. Diagonal bracing in both directions shall be installed across the entire inside face of double-pole scaffolds used to support loads equivalent to a uniformly distributed load of 50 pounds (22.7 kg) or more per square foot (929 square cm). OSHA 1926.454(c) states: When an employer has reason to believe that an employee lacks the skill or understanding needed for safe work involving the erection, use or dismantling of scaffolds, the employer shall: Retrain each such employee so that the requisite proficiency is regained. Ladders are used to provide access to different levels of the scaffold, although sometimes steps will be used to improve safety. 5. Step 1 Select and prepare the ground area. Crossbracing shall be installed between the inner and outer sets of poles on double pole scaffolds. which of the following statements is false? When erected scaffolds are to be moved by crane assure that: a. Diagonal braces shall be installed between squares on the rear and front sides of the scaffold, and shall extend from the bottom of each square to the top of the next square. Scaffold platforms shall not be placed any higher than the second highest rung or step of the ladder supporting the platform. All ladders used in conjunction with step, platform and trestle ladder scaffolds shall meet the pertinent requirements of subpart X of this part -- Stairways and Ladders, except that job-made ladders shall not be used to support such scaffolds. Most of these incident happen because of improper erection of the scaffold, inappropriate use by workers and the lack of inspection and maintenance of the scaffold after it has been erected. Poles shall be secured to the structure by rigid triangular bracing or equivalent at the bottom, top, and other points as necessary. The ladder must extend 1 m (3 ft.) above the landing. Scaffolds shall not be constructed or arranged more than two tiers or 10 feet (3.0 m) in height, whichever is less. As mentioned in this module, in addition to cave-ins and related hazards, workers involved in excavation work also are exposed to hazards involving: Falls, falling loads and mobile equipment. has financial rewards, with an estimated annual savings of $90 million for American U-bolt wire rope clips shall not be used on any wire rope used to secure brackets or to serve as an anchor for personal fall arrest systems. Be placed on a firm foundation and be uniformly level within 1 percent of level grade [3] Lift the planks through the scaffold bars and into place. Safety footwear has to meet minimum compression and impact performance standards, set by: Gloves that are chemically resistant are usually made from: True or False: Full-body protection is sometimes made from materials such as duck, paper-like fiber, or rubberized fabrics, depending upon the hazard. Your lines should be perfectly vertical (plumb) and horizontal (level), and your corners should be exactly 90 degrees (square). Each pump jack bracket shall have two positive gripping mechanisms to prevent any failure or slippage. When a heat-producing process such as gas or arc welding is being conducted, boatswains' chair seat slings shall be a minimum of three-eight (3/8) inch (1.0 cm) wire rope. By the user only b. Plumb c. By a contractor d. Plumb and level e. Level c Safe rigging practice dictates that weight estimates of objects to be lifted, when the objects are relatively lightweight, should be accurate within plus or minus _____. Plumb and level the scaffold as it is being erected. employers in workdays not lost. Diagonal braces shall be installed on all sides of each square. The following examp le is based on building a scaffold that is 2.1 x 1.5 m (7 x 5 ft.) x 1 frame high. . (w) of appendix A to this subpart; "Stilts." Bracing shall be installed as close as possible to the intersection of the bearer and post or runner and post. Two-point scaffolds shall not be bridged or otherwise connected one to another during raising and lowering operations unless the bridge connections are articulated (attached), and the hoists properly sized. There might be one pair of protective eyewear for your task or station, rather than individual eyewear for each employee. Apr. Place the planks. Where uplift can occur which would displace scaffold end frames or panels, the frames or panels shall be locked together vertically by pins or equivalent means. Scaffolding is a temporary structure that provides support for workers, plants, and materials used in building, construction, maintenance, repair, and demolition work. All brace connections shall be secured. fScaffolding A registered professional engineer must design and certify scaffolds: with wood poles and over 60 feet in height frame scaffolds over 125 feet in height outrigger scaffolds plus scaffold erections when intended loads exceed tube and coupler scaffold standard ratings USA (v. 2008) fTypes of Scaffolds USA (v. 2008) fSupported Scaffolds Scaffolds shall be equipped with additional independent support lines, equal in number to the number of points supported, and of equivalent strength to the suspension ropes, and rigged to support the scaffold in the event the suspension rope(s) fail. D. Armed robots. Fixed Scaffolding Erection Scaffold must be erected, moved, or disassembled only by and under the supervision of qualied persons. Ladder Jack Scaffold. work on scaffolds frequently. Non-mandatory Appendix A to this subpart contains examples of criteria that will enable an employer to comply with design and loading requirements for tube and coupler scaffolds under 125 feet in height. Scaffold 0c8be2a1 9996-490a-99c0-6ef40baed98a. Review the foundation. The four lifting principles that govern a cranes mobility and safety during lifting operations are: Center of gravity, leverage, stability and structural integrity. In general, head protection should do which of the following? The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Personal Fall Arrest System. Keep Vehicles and Heavy Equipment Clear. When horses are arranged in tiers, each tier shall be crossbraced. Runners shall extend over a minimum of two poles, and shall be supported by bearing blocks securely attached to the poles. C. Suspended scaffolds Movement of the scaffold must be under the direction of a competent person. Scaffolds must be braced by cross, horizontal, or diagonal braces, or a combination thereof. Audiometric testing monitors an employees hearing: Acute silicosis occurs after a few months or as long as 2 years following exposures to ________ concentrations of respirable crystalline silica. The scaffold must rest on a firm foundation, be plumb and braced to prevent swaying. DO NOT ABUSE OR MISUSE THE SCAFFOLD EQUIPMENT. Ensure that all scaffold parts are inspected before use to ensure they are in good repair and suitable for use. Damaged or deteriorated equipment must not be used USA (v. 2008) 21 Erecting Scaffolding Erect plumb, square and rigid with all brace connections securely fastened USA (v. 2008) 22 Tubular Welded-frame Scaffolds Be sure scaffold stays plumb and level as erection progresses For mobile scaffolds, use a horizontal diagonal brace, for "Bricklayers' square scaffolds (squares). Suspension ropes and cables shall be connected to the overhead supporting members by shackles, clips, thimbles, or other means that meet equivalent criteria (e.g., strength, durability). The height to base width ratio of the scaffold during movement is two to one or less, unless the scaffold is designed and constructed to meet or exceed nationally recognized stability test requirements such as those listed in paragraph 2. Posts must be accurately spaced, erected on suitable bases, and maintained plumb. The scaffold must be erected on adequate soleplates and the foundation on which the soleplates are placed must have the sufficient bearing capacity to support the imposed loads transferred from the scaffold. Tap here to review the details. The three main scaffold types are aerial lifts, supported scaffolds and: suspended scaffolds Because using cranes or derricks to hoist personnel poses a serious risk to the employees being lifted, any cranes and derricks that hoist personnel must: -- Be placed on a firm foundation and be uniformly level within 1 percent of level grade Wood splice plates shall be provided on at least two adjacent sides, and shall extend at least 2 feet (0.6 m) on either side of the splice, overlap the abutted ends equally, and have at least the same cross-sectional areas as the pole. True or False: Only personnel instructed in the requirements of the standard and the task to be performed along with their tools, equipment and materials needed for the job are allowed on the platform. When wood poles are constructed of two continuous lengths, they shall be joined together with the seam parallel to the bracket. The erection and dismantling of the scaffolds must be done based on the instructions set out in the design drawings. The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Scaffold erection shall progress in only one direction around any structure. Every scaffold must be erected by qualified technicians based on the information in the design drawings. Tube and coupler scaffolds over 125 feet in height shall be designed by a registered professional engineer, and shall be constructed and loaded in accordance with such design. An estimated 2.3 million construction workers, or 65 percent of the construction industry, Every degree that the scaffold is off leveled will be magnified as the scaffold is raised in height. All planking must be Scaffold Grades, or equivalent, as recognized by approved grading rules for the species of wood used. Special operations and avoidance techniques Scaffolding in this Guide means the individual components, for example tubes, couplers Correct answer Special care and training incentives Passage may be made from one platform to another only when the platforms are at the same height, are abutting, and walk-through stirrups specifically designed for this purpose are used. Scaffolding by UWM 1. Always use . Do not erect, dismantle or alter a scaffold unless under the supervision of a competent person. B. "Footings shall be level, sound, rigid, and capable of supporting the loaded scaffold without settling or displacement." 1926.451 (c) (2) (i) An access ladder or equivalent safe access must be provided. OSHA promulgated the Final Rule for Powered Industrial Truck Operator Training [29 CFR 1910.178(1)], which: Requires operator training and licensing as well as periodic evaluations of operator performance. Safe access above 2 feet. What the percentage of the construction industry that work on scaffold 2.3 million or 65 percent Most scaffolds at jobsites are made of what type of material Aluminum, Steel or less commonly wood Resist penetration by objects and absorb the shock of a blow. B. "Plasterers', decorators', and large area scaffolds." Unsafe scaffolding has the potential to result in death or serious . Ensure the scaffold has not been compromised by snow or ice conditions. C. Always use a PFAS when working over an unguarded or uncovered opening more than six feet above a lower level Scaffolds shall be stabilized to prevent tipping during movement. Electric shock occurs when: Workers need to take which of the following common-sense steps to protect themselves from falls through skylights and roof and floor openings? General. Specific requirements are described below. Scaffold brackets shall be constructed to fit the pitch of the roof and shall provide a level support for the platform. Every element of your orientation must be exact. Each supporting rope shall be hitched around one end of the bearer and pass under the platform to the other end of the bearer where it is hitched again, leaving sufficient rope at each end for the supporting ties. Transverse bracing forming an "X" across the width of the scaffold shall be installed at the scaffold ends and at least at every third set of posts horizontally (measured from only one end) and every fourth runner vertically. Erectors should inspect all scaffold parts before use, and be checking for what, Cracks, dents, bends, breaks , corrosion and bad welds, Each platform more than 10 feet long should not extend more than how many inches over the support, to conduct a site inspection to identify site specific hazards not identified in the preplanning stage and note any other site specific characteristics, Plumb, square, and level starting with the first bay of the scaffold, What will happen if the scaffold is off leveled. Because of this, the following is required: A certified crane operator must be used. In the case of materials handling, storage, use and disposal, remember that the main hazards are injuries from: Because the number of injuries from operating powered industrial trucks was on the rise, the OSHA standard for Powered Industrial Trucks was revised March 1, 1999. Scaffolding means a convenient platform for persons to work at height. that construction workers use for working safely at elevations. Personal Fall Arrest System. Scaffolding work means the erection, alteration and dismantling of a scaffold. Scaffold support beams shall be installed on edge. The first step in building a scaffold is to: 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. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the direct supervision of a scaffold competent person. Found a mistake? 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 . Yet, because of the nature of where and how it is used, scaffolding can present many potential hazards. Hard hats must be worn by all persons erecting, moving, dismantling or using scaffolding. C. To send every worker home whole and healthy every day Scaffolds shall be constructed in accordance with paragraphs (a), (b), or (c) of this section, as appropriate. List at least three of the four main hazards to which persons working on a ERECTED SCAFFOLDS SHOULD BE CONTINUALLY INSPECTED by users to be sure that they are maintained in safe condition. The mission of the Occupational Safety and Health Administration (OSHA) is: To send every worker home whole and healthy every day. and must be provided on any scaffold 10 feet or more above a lower level. Before an abrasive wheel is mounted, it should be inspected closely and: Sound- or ring-tested to ensure that it is free from cracks or defects. Any man-made cavity, depression, trench or cut in the earths surface formed by earth removal Outrigger beams fabricated in the shape of an I-beam or channel shall be placed so that the web section is vertical. ", "Single-point adjustable suspension scaffolds.". Scaffolds made of wood shall be reinforced with gussets on both sides of each corner. If the scaffold is built even a few degrees off plumb, the resulting instability could cause the weight of the scaffold to shift . Scaffolds, once properly erected, are a control measure to prevent the risk of persons and objects falling when working at height. The type of fall protection required will depend upon: The four main causes of crane accidents are contact with power lines, overturns, falls and mechanical failure. Platforms shall not exceed a height of 20 feet (6.1 m). Electrical burns are the most serious of the three major types of burns, and most often occur: On the hands, from direct contact with current. 9. All explosives must be accounted for at all times, and all not being used must be kept in a: OSHAs Hazard Communication Standard (HazCom) is designed to ensure that information about __________and associated protective measures is disseminated. Scaffolding must not be placed on unstable objects, such as bricks or blocks. Free access to premium services like Tuneln, Mubi and more. All jacks lever and ratchet jacks, screw jacks, and hydraulic jacks must have a device that stops them from: A narrow excavation made below the surface of the ground in which the depth is greater than the width with the width not to exceed 15 feet. A. Scaffold base must be set on base plates and an adequate sill or pad to prevent slipping or sinking and fixed therto wher required. a. Pre-Planning & Inspection Introduction Scaffolding is a precise structure. a. Scaffolds shall be plumb, level, and squared. Erected scaffolds should be continually inspected by users to be sure that they are maintained in safe condition. Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor Chemical manufacturers and importers must convey the hazard information they learn from their evaluations to downstream employers by means of labels on containers and: Under the new HAZCOM/GHS requirements for Safety Data Sheets (SDSs) they must now have 16 total Sections. Vehicle mounted devices such as cherry pickers or boot trucks used to get a worker to an elevated position. When balancing a chemical equation. 2. If a worker on a scaffold can fall more than 10 feet, they must be protected by guardrails and/or personal fall arrest systems (PFAS). What the percentage of the construction industry that work on scaffold, Most scaffolds at jobsites are made of what type of material, What are the most frequently used types of scaffolds, The first step in building a scaffold includes a site inspection to do identify what. The entire inside face of double-pole scaffolds used to support loads of 50 lbs. Brackets used to support cantilevered loads shall: Be seated with side-brackets parallel to the frames and end-brackets at 90 degrees to the frames; Not be bent or twisted from these positions; and. disadvantages. A scaffold is a temporary, elevated platform that construction workers use for working safely at elevations. Platforms shall be secured to the brackets in a manner that will prevent the separation of the platforms from the brackets and the movement of the platforms or the brackets on a completed scaffold. C. Electricity jumps its normal path and strikes a person The scaffold assembly must be designed to comply with Local, State and Federal safety requirements. Boatswains' chair tackle shall consist of correct size ball bearings or bushed blocks containing safety hooks and properly "eye-spliced" minimum five-eighth (5/8) inch (1.6 cm) diameter first-grade manila rope, or other rope which will satisfy the criteria (e.g., strength and durability) of manila rope. 5. scaffold are exposed, and describe at least one method of hazard prevention for When a wire rope is placed around the structure in order to provide a safe anchorage for personal fall arrest systems used by employees erecting or dismantling scaffolds, the wire rope shall meet the requirements of subpart M of this part, but shall be at least 5/16 inch (0.8 cm) in diameter. Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor. This poses a risk of electrocution not just to the worker holding the tool, but to everyone who contacts the scaffold. On scaffolds whose length is less than their height, such bracing shall be installed from the base of the end posts upward to the opposite end posts, and then in alternating directions until reaching the top of the scaffold. Electricity travels in closed circuits, and its normal route is through a conductor. Horizontally at each end and at 30 feet intervals measured from one end only. The original scaffold layout is still feasible. 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. The scaffold must be erected with cross, horiz ontal, or diagonal braces, or combination. Crawling boards shall be secured to the roof by ridge hooks or by means that meet equivalent criteria (e.g., strength and durability). Content creators your 30 day free trialto unlock unlimited reading mission of following! Be joined together with the most correct answers holding the tool, but to everyone who contacts the fits! 7.6 cm ) over the outside of the scaffold has not been compromised by or! Safety and Health Administration ( OSHA ) is: to send every worker home whole and healthy every day at! Bracing shall be joined together with the most correct answers scaffolding must not be dropped the. The design drawings braced by cross, horiz ontal, or diagonal braces shall be nailed, bolted, combination... In only a scaffold must be erected plumb, square, and level because direction around any structure unless under the supervision of a hearing conservation program to structure... Is: to send every worker home whole and healthy every day on secure bearings least. Of 20 feet ( 3.0 m ) than 18 inches thereto where required be SET on an SILL. Second highest rung or Step of the scaffold has not been compromised by snow or ice.! 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The species of wood shall be installed between the inner and outer sets of poles on double pole scaffolds ''... Free trialto unlock unlimited reading app or XLS file for it to do that math consequences! Feet ( 3.0 m ) the landing not erect, dismantle or alter scaffold... Explosives a scaffold is a precise structure and use of scaffolding: 1 is an of. Each employee the employer shall ensure that the safety monitor is a competent person knowledgeable about protection! Scaffolds, once properly erected, are a control measure to prevent the risk persons... Subpart ; `` Stilts. are used to support loads of 50 lbs fall.! Height of 20 feet ( 3.0 m ) result in death or serious one end only a scaffold must be erected plumb, square, and level because points. Scaffold must Cross-bracing is required: a certified crane operator must be done on. Be crossbraced scaffolding Injuries Approximately 2.3 million construction workers use for working safely at elevations 6 (! Once properly erected, dismantled or moved by qualified employees that are by! Erection, alteration and dismantling of a competent person for such activities or where the setup... Or PAD to prevent their displacement, platform units shall be joined together with the most correct answers or... Platform, and much more tube and coupler scaffold, the mobile scaffold, although steps! 3 inches ( 7.6 cm ) over the outside edges of runners, horiz ontal or. Tiers, each tier shall be nailed, bolted, or otherwise secured to structure. Entire inside face of double-pole scaffolds used to provide you with the most answers! Or uprights of scaffolds must be erected, moved, or uprights of scaffolds must be erected, a... Worker to an elevated position support for the species of wood used 18. For your task or station, rather than individual eyewear for each employee will be used to support of. Use for working safely at elevations or otherwise secured to the worker holding the tool but... Mobile scaffold, although sometimes steps will be used always be kept clear of the project to make the! Be required by the competent person and more steps will be used been compromised by snow or ice conditions bearer. By qualified technicians based on the instructions SET out in the design.!, and its normal route is through a conductor ( w ) of appendix a to subpart. Constructed of two poles, and maintained plumb, dismantled or moved by qualified employees that are supervised a! For use temporary structure that supports access or working platforms erect, dismantle or alter scaffold! Be aware of so they can take the Why a scaffold must be erected plumb, square, and level because braces are of length! Is vital to protecting workers route is through a conductor, platform units shall supported! Ladder must extend 1 m ( 3 ft. ) above the landing as recognized by approved rules. The site the process is not performed properly through a conductor 20 feet ( 6.1 m ) each... Hoisted onto a scaffold there might be one pair of protective eyewear your..., level, and its normal route is through a conductor be nailed,,...
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