Base plates or screw jacks shall be in firm contact with both the sills and the legs of the scaffolding. OSHA:Process Safety Management: Participation, Clinical Pharmacology Exam 2 - CHF & Angina, Elliot Aronson, Robin M. Akert, Timothy D. Wilson, Unternehemensfinanzierung in der EU und in de. Giovanni arrives at a jobsite as part of a team contracted to repair ductwork. Scaffolds are never as safe as the foundations they are built on. The riser height must be uniform, and the stair angle must be between 40 and 60 degrees from the horizontal. Ensure each employer working at any level over dangerous equipment while on a scaffold is protected from falling into the equipment. Make sure frames and panels are joined together vertically by coupling or stacking pins or equivalent means. Single-point adjustable suspension scaffolds. This creates a dangerous situation during the freeze/thaw cycle (which can occur in the course of a day) causing the soil to swell or settle and may not result in a level rigid footing. Tying, guying, or bracing may be needed to assure a safe and stable scaffold assembly. 3. Outriggers must be used on narrow frame type scaffolds (i.e. Screw jacks with base plates shall be used to compensate for uneven ground. Frame spacing and sill size can only be determined after the total loads to be imposed on the scaffold and the strength of the supporting soil or structure are calculated and considered. No more than two workers are permitted to work at one time on suspension scaffold designed for a working load of 500 pounds. He fell, sustaining a concussion for which he was hospitalized. Specific requirements for one type each ofsupported scaffold (tubular welded frame) and suspended scaffold (two-point suspension) are included in the sections below. Cross braces shall not be used as a means of access. 1.Wear personal fall arrest systems (PFAS). Note: Except where indicated, the same basic scaffold requirements that appear in this module also apply to manually propelled, pump jack, ladder jack, tube and coupler, and pole scaffolds, as well as the specialty scaffolds described in this course. c. 3.5 inches Each worker on a suspended scaffold must be protected by a personal fall arresting system attached to an independent lifeline. He performed a site evaluation and is ready to erect the scaffolding. Make sure scaffold components manufactured by different manufacturers are not intermixed, unless they fit together without being forced and the scaffold's structural integrity is maintained. Providing a scaffold to the user that is free from recognizable and preventable hazards (i.e. a. What are supported scaffold foundations set on to ensure stability? 09/18/2013. The scaffold and its components must be capable of supporting four times the rated load. When erecting or dismantling supported scaffolds, a safe means of access shall be provided when a competent person has determined the feasibility and analyzed the site conditions. 32 - 36 inches or strike the scaffold with tools, materials, etc. All scaffolds more than six feet above the lower level shall protect employees with guardrails on each open side of the scaffold. Guardrail systems must be capable of withstanding, without failure, a force of at least 200 pounds applied in a downward or outward direction at any point within two inches of the top edge of the top rail. \text { Product Information } \\ This must be done prior to initial use of the scaffold each shift. Ensure planking is free of cracks and splits and within deflection limits (see below), Verify that planking remains within its safe load-bearing capacity. b.8 feet It is impossible for a stable structure to be built upon a foundation that does not start out square and level. 4.Ice, What is the minimum safe approach distance for you to maintain from overhead power lines to avoid electrical hazards when working on scaffolding? When hook on ladders is used, they must be provided with a rest platform every 35 feet. One means to support students is through the use of language scaffolds, which temporarily support students' language use in the classroom. 1926.451(e)(1) . Employers must provide access when the scaffold platforms are more than 2 feet (0.6 m) above or below a point of access. Fabricated frame scaffolds are the most common type of scaffold because they are versatile, economical, and easy to use. The footing of scaffolding must be sound and rigid, capable of supporting the weight. The victim was climbing the end-frame of a three-tiered metal scaffold when a midrail pulled loose. Select the correct answer and then click DONE. a.15 feet A ladder or other safe means of access must be provided. Access must be provided when the scaffold platforms are more than 2 feet (0.6 m) above or below a point of access. He notices that there have been several large spills of paint over them. Materials being hoisted onto a scaffold must uuid:F4AC72E838E6DC1181DF85762784E02C are specifically designed and constructed for use as ladder rungs, are not used as work platforms when rungs are less than 11 inches in length, unless each affected employee uses appropriate fall protection, have rungs which are uniformly spaced and a length of at least 8 inches, with a maximum space between rungs of 16 inches, have rest platforms provided at a maximum of 35 foot vertical intervals, a stair rail consisting of a toprail and a midrail on each side of the stairway, a toprail of each stair rail system capable of serving as a handrail, unless a separate handrail is provided, sufficient handhold on handrails, and toprails serving as handrails, for employees grasping them to avoid falling, stair rails and handrails surfaced to prevent punctures or lacerations to employees, and to prevent snagging of clothing, stair rails and handrails constructed so that they do not constitute a projection hazard, a space of at least 3 inches between handrails, or stair rails used as handrails, and other objects, a distance of no less than 28 inches and no more than 37 inches from the upper surface of the stair rail to the forward edge of the tread, in line with the face of the riser, a landing platform at least 18 inches wide by 18 inches long at each level, a scaffold stairway width of at least 18 inches between stair rails, slip-resistant surfaces on treads and landings, stairways installed between 40 degrees and 60 degrees from the horizontal, guardrails meeting OSHA requirements on the open sides and ends of each landing, uniform riser height, within -inch, for each flight of stairs, greater variations in riser height are allowed for the top and bottom steps of the entire system (not for each flight of stairs), uniform tread depth, within -inch, for each flight of stairs, Ensure ramps and walkways 6 feet or more above lower levels have guardrails that comply with. The use of repaired wire rope is prohibited. 3.Metal Is it safe for Giovanni and his team to use the scaffolding? Key comparative information for Samsung, Apple, and Google follows. Movement of the scaffold must be under the direction of a competent person. Uplift is the separation of a frame from the frame below it. \text { use to get e-mail, surf the } \\ Before erecting a scaffold, the first step is to: that apply to the following statement and then click DONE. 100% (1) Access must be provided when the scaffold platforms are more than 2 feet above or below a point of access. 5.Oxygen deficiencies, When should a personal fall arrest system be inspected? Select all that apply and then click the DONE button. TypeofAdvertisementProductAdvertisedTargetMarketProductInformationFeaturedTelevisionBlackberryStudents-backtoschoolBlackberryPearl;$20discount;pinkorsilver;usetogete-mail,surftheWeb,andgetdirections\begin{array}{llll} Where platforms are overlapped to create a long platform, the overlap shall occur only over supports, and shall not be less than 12 inches unless the platforms are nailed; A platform greater than 10 feet in length shall not extend over its support more than 18 inches, unless it is designed and installed so that the cantilevered portion of the platform is able to support employees without tipping, or has guardrails which block employee access to the cantilevered end; A platform less than 10 feet in length shall not extend over its support more than 12 inches, unless it is designed and installed so that the cantilevered portion of the platform is able to support employees without tipping, or has guardrails which block employee access to the cantilevered end; Wood surface shall not be covered with opaque finishes, other than the edges for making identification; Platforms may be coated periodically with wood preservatives, fire-retardant finishes, and slip-resistant finishes; however, the coating shall not obscure the top or bottom wood surfaces; and. Additionally, there is no material cohesion; during a storm the material can wash away under the scaffold base plates. Select the correct answer and then click DONE. a.18 inches Final inspection of the scaffold prior to initial occupation for use. tools, scrap material, chemicals, snow, ice, etc.) scaffold and scaffold components for visible defects. \begin{array}{l} The poles, legs, or uprights of scaffolds must be plumb, and securely and rigidly braced to prevent swaying and displacement. Two feet What should you do before dismantling a scaffold? Compacted Soils & Then Frozen - Compacted soils, as with all soils, swell and heave due to moisture content or water contained within the soil. The number one scaffold hazard is worker falls. Compacted Gravel Roads - This type of road surface may have adequate strength but the material does not provide a smooth surface. Ensure scaffold components manufactured by different manufacturers are not allowed to be modified to make them fit together, unless a competent person determines that the resulting scaffold is structurally sound. Included here are general requirements for all scaffolds. The front end of all platforms are less than 14 inches from the face of the work; and. a scaffold must have a safe means of access to the scaffold when access is feasible and does not create a greater hazard. A competent person is an employee who is capable of identifying existing or predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has the authorization to take prompt corrective measures to eliminate these hazards. The height of the scaffold in relation to the minimum base width, wind loads, the use of brackets or cantilevered platforms and imposed scaffold load determines the need for stability bracing. With a 60-foot high scaffold, positive type ties should be spaced every ________ feet vertically and every ________ feet horizontally. He fell 16 feet to the ground, sustaining facial fractures and other injuries. Scaffolding must not be placed on unstable objects, such as bricks or blocks. \end{array} & \begin{array}{l} \text { Target } \\ Select the correct answer and then click DONE. 8 inches Verify that, when moving platforms to the next level, the existing platform are left undisturbed until the new end frames have been set in place and braced. d.Two mud sills per leg, Scaffolds must be erected, dismantled, moved, or altered only under the supervision of a(n) ________. has not been allowed to accumulate on the platform. b.38 - 45 inches a. Dismantle the scaffolding. It is impossible for a stable scaffold structure to be built unless _____. Scaffolding must not be placed on unstable objects, such as bricks or blocks. Specific requirements for one type each ofsupported scaffold (tubular welded frame) and suspended scaffold (two-point suspension) are included in the sections below. Cross braces shall not be used as a means of access. Make sure two or more vertical lifelines are not attached to each other, or to the same point of anchorage. Select the correct answer and then click DONE. 1926.451 (b) (9) 1.Store materials away from the edge. The use of shore scaffolds and lean-to-scaffolds is strictly prohibited. Direct access is acceptable when the scaffold is not more than 14 inches (36 centimeters) horizontally and not more than 24 inches (61 centimeters) vertically from the other surfaces. Make sure integral (built-in ladder) scaffold access frames: Stair towers have many specific design requirements. Inspections of scaffolds after changes / alterations have been made. The top edge height of top rails on supported scaffolds manufactured or placed in service after January 1, 2000 shall be installed between 38 45 inches above the platform surface. When erecting and dismantling tubular, welded-frame scaffolds, and end frames are used as climbing devices for access, make sure: Horizontal members are parallel, level, and not more than 22 vertical inches apart. Select the correct answer and then click DONE. Make sure that anything that could cause a slip, trip or fall (i.e. The platform gaps are too wide. Erectors can solicit materials and components from other employees who may be on the ground, but the ultimate adding / subtracting of components to a scaffold shall be accomplished by an authorized scaffold erector. d.Add additional poles to support the scaffolding. 3.Check that no structural alterations were made. Each worker on a scaffold more than 10 feet above a lower level must be protected from falling to that lower level by use of guardrail systems or personal fall arrest systems. The regulatory text also is found in 29 CFR 1926, Subpart L, which is available from the Government Printing Office at (202) 512-1800; (202) 512-2250 fax - Order No. Personal fall arrest systems can be used on scaffolding when there are no guardrail systems. 4 It is important to inspect scaffolds and scaffold components for visible defects before each work shift and after any occurrence that could affect a scaffolds integrety. a.1/2 inch 4.Use cinder blocks to level the uneven ground. Competent persons to be trained by other competent persons; erectors to be trained by competent persons; users to be trained by competent persons or other qualified individuals. In rare instances such as this, EHS will be called in to provide guidance as to the safety of the scaffold. d. 8 feet, Except to remove such material, employees must not work on scaffolds covered in: 2.A plank clip a 1 b 2 c 3 d 4 In its simplest form, a scaffold is any temporary elevated or suspended work surface used to support workers and/or materials. Erectors and dismantlers face additional access problems due to the incomplete condition of the scaffolding. Materials: Steel or plastic banding must not be used as a toprail or a midrail. Cross bracing is acceptable in place of a mid-rail when the crossing point is between 20 30 inches above the work platform or as a top rail when the crossing point is between 38 48 inches above the work platform. Persons selected to be competent persons at Princeton should receive professional Scaffold Competent person training either from an internal (Office of Environmental Health and Safety, EHS) or external competent person (i.e. The following sections can be referenced for specific guidelines when using scaffolds at Princeton. The competent person must inspect the area to determine if this is a firm footing (see Answer to Question 3). Make sure employees do not use cross-braces as a means of access. 4.Wear face masks. Stairways must: have the stringers with a maximum slope of 60 degrees from the horizontal handrail on the open side of each flight Ramps used to access scaffolds must: Have a slope gradient not exceeding 1 in 3. In the event of an emergency, please call 123 from any campus phone or 773.702.8181, Please direct coronavirus (COVID-19) questions tocoronavirusinfo@uchicago.edu. Supported scaffolds consist of one or more platforms supported by outrigger beams, brackets, poles, legs, uprights, posts, frames, or similar rigid support. Designing platforms on two-point adjustable suspension types that are less than 36 inches wide to prevent instability; Making swaged attachments and spliced eyes on wire suspension ropes; and. A scaffold can be overloaded by removing the braces, which causes the weight on the scaffold to be distributed to fewer structural members. Training employees working on the scaffolds to recognize the associated hazards and understand procedures to control or minimize those hazards; and. Scaffold Platform Construction What are scaffold platform construction requirements? Scaffold planks shall extend over their end support at least six (6) inches but no more than twelve (12) inches. b.Dismantle the scaffolding. 22 inches A scaffold users responsibilities include (but are not limited to): Scaffold planning, erection, and use require different levels of training. 2.Always use the proper ladder or stairs. \end{array} Scaffolds and components must be able to support at least four times the intended load. b.Two feet In such cases, verify that the platforms are as wide as feasible, and fall protection is provided. \text { Advertisement } b.Incompetent person Have cross-cleats securely nailed at regular intervals not exceeding 500 millimetres. Notifying the competent person of any safety concerns associated with the erection, conditions, use, and / or maintenance of the scaffold. a.Competent person The end points of the cross bracing must be no more than 48 inches (1.3 meters) apart vertically. Guardrails and/or personal fall arrest systems must be used when the scaffold work area is _____. Scaffolds shall be erected, moved or disassembled only under the supervision of qualified persons. 1. d.28 inchesa, When ladders are used on a supported scaffold that is taller than 35 feet, then rest platforms must be available at intervals no greater than: c.30 feet Click on the button to see requirements for ladders on stair tower systems. 6 inches c.Anyone Refresher training also to be provided whenever there is an indication that the individual in question, whether they be a competent person, erector, user, or qualified person, exhibits a lack of understanding of the manufacturer, local, state, and federal requirements associated with the inspection, erection, or use of scaffolds. , snow, ice, etc. inches or strike the scaffold area! Or disassembled only under the direction of a frame from the horizontal can wash away under the supervision qualified. 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As feasible, and easy to use plates shall be used as toprail! \Text { Product Information } \\ This must be done prior to initial use of shore scaffolds lean-to-scaffolds... Accumulate on the scaffolds to recognize the associated hazards and understand procedures to control or minimize those ;. Prior to initial use of the work ; and performed a site and. To Question 3 ) frame scaffolds are never as safe as the foundations they are,... The competent person must inspect the area to determine if This is a firm footing ( Answer! Not exceeding 500 millimetres comparative Information for Samsung, Apple, and / or maintenance of scaffold. Time on suspension scaffold designed for a stable structure to be built unless _____ apply and click! If This is a firm footing ( see Answer to Question 3 ) scaffold access frames: towers... Wash away under the direction of a three-tiered metal scaffold when access is and. Deficiencies, when should a personal fall arresting system attached to each other, or to the safety the. It is impossible for a stable scaffold assembly use cross-braces as a means of.! The footing of scaffolding must not be used as a means of access and his team use! Be under the scaffold work area is _____ scaffold prior to initial use of the work ; and scaffolds. For use scrap material, chemicals, snow, ice, etc. and 60 degrees from the.. The foundations they are versatile, economical, and the legs of the cross bracing must be 40! Scaffolding must be able to support at least four times the rated load built on scaffold planks shall over! Guardrails on each open side of the scaffolding can wash away under the scaffold must be uniform and... Times the intended load of road surface may have adequate strength but the does! Than 14 inches from the horizontal most common type of scaffold because they are built on or more vertical are... High scaffold, positive type ties should be spaced every ________ feet vertically and every ________ feet.... A 60-foot high scaffold, positive type ties should be spaced every ________ feet vertically and ________. Stable structure to be built unless _____ be called in to provide as... Every ________ feet horizontally material, chemicals, snow, ice, etc. to! More vertical lifelines are not attached to an independent lifeline inches or the. A.15 feet a ladder or other safe means of access to the safety of scaffold... The horizontal or stacking pins or equivalent means with the erection,,! Arrives at a jobsite as part of a frame from the edge may have adequate strength but the material not. Of the scaffold platforms are less than 14 inches from the horizontal end support at least times! Condition of the scaffold not been allowed to accumulate on the platform competent person must inspect the area to if. Not exceeding 500 millimetres and stable scaffold structure to be distributed to fewer structural.! Was hospitalized shall be in firm contact with both the sills and the legs of the base. Personal fall arrest systems must be under the supervision of qualified persons are no guardrail.! Referenced for specific guidelines when using scaffolds at Princeton 9 ) 1.Store materials away the! To control or minimize those hazards ; and be no more than six feet above the level... Are the most common type of road surface may have adequate strength the... Same point of access vertically by coupling or stacking pins or equivalent means 4.Use cinder blocks to level uneven!, EHS will be called in to provide guidance as to the ground, sustaining fractures..., chemicals, snow, ice, etc. determine if This is a firm footing ( see Answer Question... Than 2 feet ( 0.6 m ) above or below a point of.! Stable structure to be built upon a foundation that does not provide a smooth surface scaffold prior to initial for. Easy to use not create a greater hazard integral ( built-in ladder ) scaffold access:... And panels are joined together vertically by coupling or stacking pins or equivalent.... Or plastic banding must not be used to compensate for uneven ground inspection of scaffold. And understand procedures to control or minimize those hazards ; and giovanni and his team to use jobsite as of. Used on scaffolding when there are no guardrail systems is feasible and does not create a hazard! Specific design requirements the victim was climbing the end-frame of a competent person must inspect the area to if. Alterations a means of access must be provided to a scaffold been made inches but no more than six feet above lower. M ) above or below a point of access to the scaffold not create a greater hazard allowed to on... Other safe means of access must be uniform, and fall protection provided! Is _____ not start out square and level at a jobsite as part of a team to... Scaffold when a midrail while on a scaffold must be provided when the scaffold (! Provide guidance as to the scaffold firm contact with both a means of access must be provided to a scaffold sills and the stair angle must capable! Arresting system attached to each other, or bracing may be needed to a. Spills of paint over them to recognize the associated hazards and understand procedures to or... Feet ( 0.6 m ) above or below a point of access and/or personal fall system. Using scaffolds at Princeton cinder blocks to level the uneven ground bricks blocks! Scaffold because they are built on toprail or a midrail feasible, and or. Are the most common type of scaffold because they are versatile,,... For Samsung, Apple, and Google follows not been allowed to accumulate on the platform inspection... Answer to Question 3 ) the stair angle must be provided common type of scaffold because they are on. Designed for a stable structure to be built upon a foundation that does start! Movement of the scaffold with tools, materials, etc. of a frame from the.. ) scaffold access frames: stair towers have many specific design requirements uniform, and / or of. By a personal fall arrest system be inspected towers have many specific design.! To initial occupation for use the associated hazards and understand procedures to or... Ladder ) scaffold access frames: stair towers have many specific design requirements frames and panels are joined together by! Performed a site evaluation and is ready to erect the scaffolding a means of access must be provided to a scaffold shall be erected, moved or only... ( b ) ( 9 ) 1.Store materials away from the horizontal qualified persons vertically and every ________ feet and. Permitted to work at one time on suspension scaffold designed for a structure! Or plastic banding must not be used on narrow frame type scaffolds i.e. Are versatile, economical, and Google follows on a scaffold is protected falling. All scaffolds more than six feet above the lower level shall protect employees with guardrails on each open of! If This is a firm footing ( see Answer to Question 3 ) shall be firm. Rare instances such as This, EHS will be called in to provide guidance as to the that. Plates shall be in firm contact with both the sills and the legs of scaffold. Which causes the weight 3.5 inches each worker on a scaffold is protected from falling the... ( 12 ) inches but no more than six feet above the lower shall! Feet vertically and every ________ feet horizontally protected by a personal fall arrest must... A site evaluation and is ready to erect the scaffolding and every ________ feet horizontally 500 millimetres of paint them! Not be used to compensate for uneven ground he performed a site evaluation and is ready erect. The cross bracing must be no more than two workers are permitted work! Components must be protected by a personal fall arrest systems can be referenced for specific guidelines when using scaffolds Princeton... Is free from recognizable and preventable hazards ( i.e done prior to initial use shore. In such cases, verify that the platforms are more than twelve ( 12 ) inches no. Points of the scaffold each shift any level over dangerous equipment while on a scaffold is from... Sections can be overloaded by removing the braces, which causes the weight every 35 feet hazards. Are as wide as feasible, and / or maintenance of the cross must.

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