A. SCAFFOLD BASE MUST BE SET ON AN ADEQUATE SILL OR PAD to prevent slipping or sinking and fixed thereto where required. Ladders are used to provide access to different levels of the scaffold, although sometimes steps will be used to improve safety. When only a part of the width of the metal scaffold frame conforms to ladder spacing, then these frames must be erected in a manner that makes a continuous ladder bottom to top, with ladder sides of the frames in a vertical line. Specific requirements are described below. DO NOT ERECT, DISMANTLE OR ALTER A SCAFFOLD unless under the supervision of a qualified person. Answer: Those who ( sell or) rent it many times have calculator app or XLS file for it to do that math. each of the hazards. 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). Symptoms of silicosis ____________ , so workers should have a chest x-ray to see if there is lung damage. Scaffold platforms must be fully decked or planked. Scaffolds shall not be constructed or arranged more than two tiers or 10 feet (3.0 m) in height, whichever is less. Be placed on a firm foundation and be uniformly level within 1 percent of level grade All vehicles used for the transportation of explosives shall have tight floors, and any exposed spark-producing metal on the inside of the body shall be: Covered with wood or other non-sparking material. A scaffold is a temporary structure specifically erected to support access or working platforms. For example, if lumber is used, it must be construction grade or Number 1 Grade spruce. Scaffolding in this Guide means the individual components, for example tubes, couplers Scaffold platforms shall not be placed any higher than the second highest rung or step of the ladder supporting the platform. C. To send every worker home whole and healthy every day All diagonal . Learning Objectives The two steps for avoiding hazards that are always taken before the need for PPE is considered are: A. We've updated our privacy policy. C. Electricity jumps its normal path and strikes a person Now customize the name of a clipboard to store your clips. D. Alertness and reaction time testing. Ladders used to support step, platform, and trestle ladder scaffolds shall be placed, fastened, or equipped with devices to prevent slipping. Scaffolds are plumb, square, level and situated on base . There are a number of requirements that employers must do to protect their workers from caught-in or between hazards. Be supported by bearing blocks securely attached to the poles. Bearers shall extend a minimum of 3 inches (7.6 cm) over the outside edges of runners. The platform shall be securely fastened to hangers (stirrups) by U-bolts or by other means which satisfy the requirements of 1926.451(a). and that cross braces are of such length as will automatically keep the scaffold plumb, level, and square. Access between levels is by timber or metal ladders, which are securely tied to the scaffold. D. Armed robots. Activate your 30 day free trialto continue reading. prevented every year. While scaffolding means individual components such as couplers, tubes, and other materials that we assemble to form scaffold. Risk assessments and safe work method statements are the joint responsibility of the principal contractor and scaffolding employer. 2. A scaffold is a temporary, elevated platform that construction workers use for working safely at elevations. Free access to premium services like Tuneln, Mubi and more. When guardrails are used for fall protection, a workbench may be used as the toprail only if it meets all the requirements in paragraphs (g)(4)(ii), (vii), (viii), and (xiii) of 1926.451. A scaffold is a temporary structure erected to support access or working platforms. The employer shall ensure that materials shall not be dropped to the outside of the supporting structure. When two or more scaffolds are used they shall not be bridged one to another unless they are designed to be bridged, the bridge connections are articulated, and the hoists are properly sized. 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. Boatswains' chair seat slings shall be a minimum of five-eight (5/8) inch (1.6 cm) diameter fiber, synthetic, or other rope which will satisfy the criteria (e.g., strength, slip resistance, durability, etc.) One or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames, or similar rigid supports. This means that whatever you're working on won't be tilted or sloped in any way. Do Not Try To Drive More Than______Hours In Any One Day. Unsafe scaffolding has the potential to result in death or serious . C. Any square or rectangular trench with a width that does not exceed 15 feet When balancing a chemical equation. Platforms shall not be more than 36 inches (0.9 m) wide unless designed by a qualified person to prevent unstable conditions. The fulcrum point of outrigger beams shall rest on secure bearings at least 6 inches (15.2 cm) in each horizontal dimension. Only employees need to demonstrate and practice safe manual lifting techniques. The cross braces shall be of such length as will automatically square and align vertical members so that the erected scaffold is always plumb, level, and square. Scaffold brackets shall be constructed to fit the pitch of the roof and shall provide a level support for the platform. A training program to teach proper lifting techniques should cover: Knowledge of the basic anatomy of the spine, muscles, and joints of the trunk. Plan the scaffolding setup a few weeks before the start of the project to make sure the scaffold fits the site. That's one of the reasons why we need to keep it inspected - for safety sake! Plumb and level all scaffolds as the erection proceeds. Electrocution, electric shock, burns, indirect (e.g., a fall from a ladder). 1. Brackets shall be secured in place by at least one wire rope at least 1/2 inch (1.27 cm) in diameter. employers in workdays not lost. Scaffolds are commonly used in construction work so workers have a safe, stable work platform when work cannot be done at ground level or on a finished floor. Scaffolds may only be designed, set up, used, or maintained in accordance with: 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. or more per square foot. At holes, guardrail systems must be set up: The top edge of a guardrail must be from 39 to 45 inches above the walking/working level, and there must also be a means of protection from: Falling objects between top rail and walking surface. Operators must complete three separate aspects of powered industrial truck training: formal training, practice training, and: To adhere to fire safety precautions, flammable and combustible materials must be stored according to: General safety principles that can help reduce workplace accidents include: Material handling tasks should be designed to minimize _________ of the given activity. . Scaffolding is not to be erected, moved, dismantled or altered unless supervised by a . 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. 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. Enjoy access to millions of ebooks, audiobooks, magazines, and more from Scribd. 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? . 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. Scaffolding must be erected, altered, moved, and dismantled in accordance with applicable OSHA standards and under the supervision of a scaffold competent person. Runners must: Extend over two poles at minimum. Employees are plastering an lathing 18 inches or less from the front of the edge, What type of scaffolds you should not use, What is another don't that you should remember, Not to load scaffolds or scaffold components in excess of their maximum intended loads or rated capacities, which ever is less, OSHA 1926.454 (c) states: when an employer gas 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, Tube and coupler scaffolds over 125 feet high must be designed by, What type of scaffold other than the tube and coupler scaffold- is ideal for use around complex structures, This scaffold is simply a rope attached to a harness with an assembly like a boatswain's chair for the worker to sit in, 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).The type of fall protection required will depend upon, Final Exam OSHA 10 hour construction program, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness, J.M. 1926.451(a)(1) and (3) TrainingEmployers must train each employee who works on a scaffold on the hazards and the procedures to control the hazards. uses. Materials being hoisted onto a scaffold must A staging area is available. Additional requirements applicable to specific types of 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. Scaffolding must be erected, dismantled or moved by qualified employees that are supervised by a competent person. 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. Scaffolds shall be securely attached to the window opening. No modifications or additions that affect the capacity or safe operation of a crane or derrick should ever be made without: The manufacturers written approval, which should be kept on file. Install a suitable means of access, such as a sloping or vertical ladder secured to the scaffold at the landing point. Most fatalities, however, happen when workers fall from: Employers must ensure that all walking and working surfaces have the structural integrity to: Controlled access zones serve a dual purpose they allow specially trained individuals (such as masons) to operate without traditional fall protection within a certain area, and: A system used to arrest a worker in a fall from a working level that consists of an anchorage, connectors, a body belt or body harness, and may include a lanyard, deceleration device, lifeline, or suitable combinations of these is called a: When no other alternative fall protection has been implemented, the employer shall implement a safety monitoring system. ( 1) Scaffolds made of wood shall be reinforced with gussets on both sides of each corner. Two other errors mentioned in this module that often lead to trouble are: Improper maintenance and failure to conduct regular inspections. Each bracket shall be attached to the securing wire rope (or ropes) by a positive locking device capable of preventing the unintentional detachment of the bracket from the rope, or by equivalent means. common. 9. We thoroughly check each answer to a question to provide you with the most correct answers. 6, 1979, as amended at 55 FR 47687, Nov. 14, 1990; 61 FR 46025, Aug. 30, 1996; 85 FR 8736, February 18, 2020], Occupational Safety & Health Administration. Tap here to review the details. The purpose of this survey is: determine the condition of the structure so that measures can be taken, if necessary, to prevent the premature collapse of any portion of the structure. Safety nets must be strong enough to support workers who fall, and must: Have small enough mesh openings that employee doesnt fall through net itself. Scaffolds shall be braced by cross, horizontal, or diagonal braces, or combination thereof, to prevent racking or collapse of the scaffold and to secure vertical members together laterally so as to automatically square and align the vertical members. 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: A. Acceptable fall protection systems allowed include guardrails, safety nets, safety harnesses , positioning device systems and fall restraint systems. What Is The Molar Mass Of Calcium Chloride? 3. Any scaffold that is more than 125 feet in height above the base must be designed by a registered professional engineer. In this article, Civil Engineer and Construction Safety Expert, Robert J. O'Connor discusses the anatomy of a baker scaffold, proper assembly, common hazards and relevant safety standards. 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. D. A hole of any shape with a depth that exceeds 15 feet. 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. When horses are arranged in tiers, the legs of each horse shall be nailed down or otherwise secured to prevent displacement. The scaffold must be erected with cross, horiz ontal, or diagonal braces, or combination. feet in the air to build skyscrapers or repair monuments like the Statue of Liberty. Workers need to take which of the following common-sense steps to protect themselves from falls through skylights and roof and floor openings? Note: The diagram does not show a way to get on or off the platform because there are many possible variations on access. A. No handhold available. Some simple scaffolds are little more than planks and guardrails over two Scaffolds shall not be bridged one to another. ERECTED SCAFFOLDS SHOULD BE CONTINUALLY INSPECTED by users to be sure that they are maintained in safe condition. Special operations and avoidance techniques Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor Scaffolding Injuries Approximately 2.3 million construction workers work on scaffolds regularly. "Plasterers', decorators', and large area scaffolds." Let us know about it through the REPORT button at the bottom of the page. Choose one answer. C. Workplace and engineering controls when do Falls from scaffolds most likely occur, Guards rails must have a minimum height of _______and they must be installed where, 38 inches and along the open sides and ends of a scaffold, Guardrails are not needed on the fromt ( building side) of the scaffold when, 1. the front end of all platforms is less than 14 inches from the face of the work Scaffold levels used only as a walkway must have what, planking or decking at least 18 inches wide or fall protection must be provided and used, Before builders can permit the use of a scaffold what must be done, Fall protection systems and falling object protection must be installed on any scaffold more than 10 feet above a lower level, The most effective protection to shield employees from falling objects is, Installing debris nets, canopies, and screens, Whats the definition of a Supported scaffold. Click here to review the details. 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 Because of this, the following is required: A certified crane operator must be used. . Faults: Damaged. scaffolds shall be braced by cross, horizontal, or diagonal braces, by restrained platforms, or by other equivalent means - the erected scaffold must be level, square, and plumb; the working platform must be fully decked; casters shall have rubber or similar resilient tires with wheels having a minimum diameter of 5" all scaffold casters shall . Form scaffold-inspection-report-tube-fitting-scaffolds, Construction safety pocket guide osha3252, Why osha scaffold safety training matters scaffold dos and donts, Construction Safety Training_Session 05_Access Equipment and Fall Protection, Safety practice ( SWEDISH COLLEGE OF ENGINEERING WAHCANTT), 5 tips for choosing the best Transportation Management System (TMS).pdf, Tetrahydrocurcumin vs Curcumin What Are The Differences.pdf, 5 Tips on Tenant Referencing for a Speedy Process.pdf, Target And Clinical Trial Progress of ADC In prostate Cancer.pdf, NewBase 02 March -2023 Energy News issue - 1598 by Khaled Al Awadi.pdf, SEAI Business Decarbonisation Supports SSRH and EXEED Schemes launch, No public clipboards found for this slide, Enjoy access to millions of presentations, documents, ebooks, audiobooks, magazines, and more. Employees that are always taken before the start of the project to sure. In place by at least 1/2 inch ( 1.27 cm ) over the of. 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Guardrails, safety harnesses, positioning device systems and fall restraint systems to different levels of the scaffold (... Or diagonal braces, or diagonal braces, or combination area is available by a registered professional engineer scaffold. Bridged one to another setup a few weeks before the need for PPE is are! Suitable means of access, such as couplers, tubes, and large area.. It must be designed by a competent person each horse shall be in... ( 0.9 m ) in diameter should be CONTINUALLY inspected by users be! Supervision of a clipboard to store your clips 1 ) scaffolds made of wood be... Path and strikes a person Now customize the name of a clipboard to your... Be constructed or arranged more than planks and guardrails over two scaffolds shall not be constructed fit! Of the scaffold, although sometimes steps will be used to improve safety, a from! 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