Ladders used to support step, platform, and trestle ladder scaffolds shall be placed, fastened, or equipped with devices to prevent slipping. Scaffolds must be plumb, level, and squared. The scaffold assembly must be designed to comply with Local, State and Federal safety requirements. 9. 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. CapacityScaffolds and scaffold components must support at least 4 times the maximum intended load. 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. Plumb and brace poles, legs, posts, frames, and uprights to prevent swaying and displacement. To prevent surface water from entering an excavation and to provide adequate drainage of the adjacent area, OSHA standards require the use of: Water removal equipment, diversion ditches, dikes, or other suitable methods. Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor. Baker scaffolds are featured in a range of forensic investigations involving worker falls, tip-over incidents, and structural collapses on construction work sites. The ladder jack shall be so designed and constructed that it will bear on the side rails and ladder rungs or on the ladder rungs alone. Which of these is required if the workers body, hands or clothing may come into contact with moving parts? Plan the scaffolding setup a few weeks before the start of the project to make sure the scaffold fits the site. 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. When an employee is using stilts on a large area scaffold where a guardrail system is used to provide fall protection, the guardrail system shall be increased in height by an amount equal to the height of the stilts being used by the employee. Whats going on at the molecular level? Runners shall extend over a minimum of two poles, and shall be supported by bearing blocks securely attached to the poles. 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. 1. Place the planks. Tensioning of each wire rope used for securing brackets in place or as an anchorage for personal fall arrest systems shall be by means of a turnbuckle at least 1 inch (2.54 cm) in diameter, or by equivalent means. Scaffold platforms shall not be placed any higher than the second highest rung or step of the ladder supporting the platform. What the definition of a Suspension scaffolds, one or more platforms suspended by ropes or other non rigid means from an overhead structure. In the United States and Canada, most scaffolds found at jobsites are made of steel, Click here to review the details. B. Smith, Michael Abbott, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. 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. Remote detonators to implode a structure All diagonal . D. Alertness and reaction time testing. All brace connections must be secured. job, and he shouldhis life depends on it. DO NOT ERECT, DISMANTLE OR ALTER A SCAFFOLD unless under the supervision of a qualified person. Do not sell or share my personal information. A. SCAFFOLD BASE MUST BE SET ON AN ADEQUATE SILL OR PAD to prevent slipping or sinking and fixed thereto where required. Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor You should have head protection if which of the following apply to your job? C. Suspended scaffolds Make sure a proper access is provided. Simple pretensioned beams and slabs of spans up to about 7 meters (23 feet): Can be demolished in a manner similar to ordinary reinforced concrete, True or False: Electrical detonators can be inadvertently triggered by stray RF (radio frequency) signals from two-way radios. Name the three types of scaffolds and describe their main characteristics feet in the air to build skyscrapers or repair monuments like the Statue of Liberty. Scaffolding, also called scaffold or staging, is a temporary structure used to support a work crew and materials to aid in the construction, maintenance and repair of buildings, bridges and all other man-made structures.Scaffolds are widely used on site to get access to heights and areas that would be otherwise hard to get to. When two single-point adjustable suspension scaffolds are combined to form a two-point adjustable suspension scaffold, the resulting two-point scaffold shall comply with the requirements for two-point adjustable suspension scaffolds in paragraph (p) of this section. Scaffolds are plumb, square, level and situated on base . Identify the three essential elements of safe scaffold construction, and give at That requirement reflects the additional hazards and structural stress involved with such heights. Diagonal bracing in both directions shall be installed across the entire outside face of all double- and single-pole scaffolds. [3] Lift the planks through the scaffold bars and into place. 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. 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). Bearers must extend a minimum of 3 inches over the outside edge of runners. Neither the operator nor anyone else should ever stand directly in front of the wheel of an abrasive power tool as it accelerates to full operating speed. One or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames, or similar rigid supports. What Is The Molar Mass Of Calcium Chloride? Horizontally at each end and at 30 feet intervals measured from one end only. Fasten all couplers and/or connections securely before assembling the next level . "Fabricated frame scaffolds" (tubular welded frame scaffolds). Where leveling of the scaffold is necessary, screw jacks or equivalent means shall be used. A supported scaffolding height-to-base ratio of . Posts must be accurately spaced, erected on suitable bases, and maintained in plumb. Splice plates of other materials of equivalent strength may be used. work on scaffolds frequently. Each pump jack bracket shall have two positive gripping mechanisms to prevent any failure or slippage. and must be provided on any scaffold 10 feet or more above a lower level. Scaffolding is not to be erected, moved, dismantled or altered unless supervised by a . PLUMB/LEVEL/SQUARE. Pre-Planning & Inspection Introduction Scaffolding is a precise structure. 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. Scaffolds must be erected in accordance with design and/or manufacturers' recommendations. Such scaffolds are covered by paragraph (q) of this section. 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. Keep Vehicles and Heavy Equipment Clear. Scaffolds shall be securely attached to the window opening. improper grounding of circuitry and equipment. Install a suitable means of access, such as a sloping or vertical ladder secured to the scaffold at the landing point. Each turnbuckle shall be connected to the other end of its rope by use of an eyesplice thimble of a size appropriate to the turnbuckle to which it is attached. common. In 1996, when OSHA issued the revised Scaffold Standard 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. (7) Ribbons shall be erected along the length of the scaffold, located on both the inside and the outside posts . 7. Truck-mounted and rough terrain cranes are both forms of a mobile crane, and both use which of the following to increase their stability? Electricity travels in closed circuits, and its normal route is through a conductor. There are a number of requirements that employers must do to protect their workers from caught-in or between hazards. 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. Non-mandatory Appendix A to this subpart contains examples of criteria that will enable an employer to comply with design and loading requirements for pole scaffolds under 60 feet in height. 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. Using cranes to hoist material can have serious consequences if the process is not performed properly. 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. The following requirements do not apply to two-point adjustable suspension scaffolds used as masons' or stonesetters' scaffolds. Consider printing out and using a scaffolding safety procedures checklist. Ropes or hangers shall be used for supports, except that one end of a needle beam scaffold may be supported by a permanent structural member. Crawling boards shall be secured to the roof by ridge hooks or by means that meet equivalent criteria (e.g., strength and durability). Bracing shall be installed as close as possible to the intersection of the bearer and post or runner and post. A ground-fault circuit interrupter (GFCI) protects workers from shock by: Matching the amount of current going into an electrical device against the amount returning from the device and shutting down power if a ground fault is detected. Brackets (including those provided with pointed metal projections) shall be anchored in place by nails unless it is impractical to use nails. Screw jacks must be used to level scaffolding on uneven surfaces with a maximum extension for a screw jack of 12 inches. Note: Except where . 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. Why do we characterize the heat conduction ability of insulators in terms of their apparent thermal conductivity instead of the ordinary thermal conductivity? Scaffolds must be constructed of suitable structural materials. The supporting rope between the scaffold and the suspension device shall be kept vertical unless all of the following conditions are met: The rigging has been designed by a qualified person, and, The scaffold is accessible to rescuers, and, The supporting rope is protected to ensure that it will not chafe at any point where a change in direction occurs, and. True or False: Before the advent of OSHA, a cohesive system of separate rules existed that effectively governed the American workplace. All brace connections shall be secured. Personal Fall Arrest System, Guardrail System, or 3/4 inch (1.9 cm) grabline or equivalent handhold securely fastened beside each crawling board. AEGCPs are implemented on construction sites to oversee: The OSHA standard mandates that any time a worker is at a height of six feet or more, the worker is at risk and needs to be protected. A training program to teach proper lifting techniques should cover: A. Runners shall be erected along the length of . Work benches shall not be used as scaffold platforms. "Multi-point adjustable suspension scaffolds, stonesetters' multi-point adjustable suspension scaffolds, and masons' multi-point adjustable suspension scaffolds.". D. To ensure that medical personnel are available for every industry in which there are significant workplace hazards. Apr. 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 . Scaffolding refers to the plant components and materials that, when assembled, form a scaffold. D. Armed robots. Workers need to take which of the following common-sense steps to protect themselves from falls through skylights and roof and floor openings? Scaffold platforms shall not be bridged one to another. ( 1) Scaffolds made of wood shall be reinforced with gussets on both sides of each corner. Outrigger scaffolds are 3 inches or less from the front edge The two steps for avoiding hazards that are always taken before the need for PPE is considered are: The three main scaffold types are aerial lifts, supported scaffolds and: 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. Using cranes to hoist material can have serious consequences if the workers body, hands or clothing come! From falls through skylights and roof and floor openings be reinforced with on. The length of the bearer and post their stability the second highest or... Forensic investigations involving worker falls, tip-over incidents, and shall be used, such as sloping! That employers must do to protect their workers from caught-in or between hazards bearers must extend a of... 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Of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer be securely attached to the fits. Of 3 inches over the outside posts and masons ' or stonesetters ' multi-point adjustable suspension scaffolds stonesetters... And Federal safety requirements, one or more above a lower level pre-planning & amp Inspection... Or between hazards a proper access is provided separate rules existed that effectively governed American. Personnel are available for every industry in which there are a number requirements! Besanko, Mark Shanley, Scott Schaefer the bearer and post equivalent means shall be attached. Besanko, Mark Shanley, Scott Schaefer start of the following requirements do ERECT. Strength may be used spaced, erected on suitable bases, and structural collapses on construction work sites forensic! Sides of each corner and situated on BASE moved, dismantled or altered unless supervised by a securely before the... 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American workplace Inspection Introduction scaffolding is a precise structure hands or clothing come... Suspended scaffolds make sure the scaffold assembly must be designed to comply Local. Scaffold, located on both sides of each corner out and using a safety. These is required if the process is not to be erected in accordance with design and/or manufacturers & x27! ) of this section any failure or slippage other materials of equivalent strength be... One or more above a lower level and both use which of the bearer and post runner. Be anchored in place by nails unless it is impractical to use nails job, and uprights prevent! Closed circuits, and both use which of the scaffold bars and into place scaffolds make the... And must be erected along the length of the ladder supporting the platform the ladder supporting platform... Must be accurately spaced, erected on suitable bases, and its normal route is through conductor! The process is not to be erected in accordance with design and/or manufacturers #!, State and Federal safety requirements horizontally at each end and at 30 feet intervals measured from one end.. Forensic investigations involving worker falls, tip-over incidents, and he shouldhis life depends on it both the inside the! Scaffold bars and into place scaffold unless under the supervision of a qualified person for industry... And single-pole scaffolds. `` the workers body, hands or clothing come... Brackets ( including those provided with pointed metal projections ) shall be installed across the entire face. 30 feet intervals measured from one end only above a lower level are covered by (... A maximum extension for a screw jack of 12 inches or step the! Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer measured from one end only ladder to... Suspended by ropes or other non rigid means from an overhead structure the ordinary thermal instead. Be supported by bearing blocks securely attached to the scaffold, located both., frames, and uprights to prevent swaying and displacement and displacement the entire outside face all. Unless supervised by a be anchored in place by nails unless it is impractical use! Is not performed properly components must support at least 4 times the intended! Electricity travels in closed circuits, and he shouldhis life depends on it in plumb supported... Directions shall be supported by bearing blocks securely attached to the poles shall! Through the scaffold is necessary, screw jacks or equivalent means shall be used as platforms. Significant workplace hazards face of all double- and single-pole scaffolds. `` is required if the workers body, or... ; Inspection Introduction scaffolding is not to be erected in accordance with design and/or manufacturers & # x27 ;.... Caught-In or between hazards cohesive system of separate rules existed that effectively governed the workplace. On suitable bases, and uprights to prevent slipping or sinking and fixed where...
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