Presentation on theme: "Tank Builders Scaffold Guidelines"— Presentation transcript:
1Tank Builders Scaffold Guidelines Presented by:STI/SPFASafety & Health Committee
2NOTESThe following materials have been developed by STI/SPFA to generally illustrate industry practice. In developing these guidelines, STI/SPFA makes no judgment as to whether such industry practice reflects reasonable care. These materials merely set forth a general method by which scaffolding for tanks and vessels may be erected, used, maintained, and inspected, and by which personnel may gain a preliminary background in the hazards of Tank Builders Scaffold. These Guidelines are not in any manner to be construed as superseding or supplementing the OSHA Guidelines promulgated under 29 CFR through and as listed in Appendix A, or any other OSHA Guidelines or applicable federal, state or municipal laws, regulations and ordinances. Each employer has the responsibility to follow, and ensure that its employees comply with the OSHA Guidelines and all other applicable laws, regulations and ordinances concerning Tank Builders Scaffold and the erection, use, maintenance, inspection and employee training and safety in regard thereto. There Guidelines shall in no manner be construed as imposing any liability upon STI/SPFA for any bodily injuries or damage to personal property resulting from the implementation of any of the information contained within there Guidelines. Further, STI/SPFA accepts no liability for the use, misuse, interpretation, or misinterpretation of any of the information contained herein by any person or entity. STISPFA DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.By taking possession of these Guidelines, the holder hereof understands that IN NO EVENT, WHETHER AS A RESULT OF A BREACH OF WARRANTY, BREACH OF CONTRACT, NEGLIGENCE OR OTHERWISE, SHALL STI/SPFA BE LIABLE FOR DAMAGES RESULTING FROM THE REFERENCE TO OR RELIANCE ON THESE MATERIALS, INCLUDIN ANY ACTUAL OR ECONOMIC DAMAGES, LOSS OF PROFITS OR INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF STI/SPFA IS ADVISED FO THE POSSIBILITY OF SUCH DAMAGE. These materials may be revised or withdrawn at any time without prior notice by STI/SPFA.
3Lesson Overview Purpose: To provide workers with introductory information about Tank Builders Scaffold.Topics:Scaffold use hazardsInstallation proceduresInspection requirementsDismantling proceduresGeneral rules for Scaffold useNote: This training is designed to compliment the Steel Tank Institute/Steel Plate Fabricators Association’s written Tank Builders Scaffold Guidelines.
4What is a Tank Builders Scaffold? A supported scaffold consisting of a platform resting on brackets. The brackets are either directly attached to a tank, or attached to devices, e.g., clips, which are in turn attached to such a tank.
5Scaffold Use Hazards Survey the jobsite for hazards Electrical hazards Loose materials on scaffoldFalling objectsSlips, trips, and fallsMisuse of scaffold and scaffold failureImproper access or egress
6Scaffold Use Hazards Falls to a different level Incorrect erection and dismantling.Accessing the work area by climbing the structure.Absence of or incomplete guardrails.Scaffold platform not fully decked.Breakage of workplatform.Precautionary Measure:Personal Fall Arrest System and/or Guardrail required
7Scaffold Use Hazards Falls to the same level Because of lack of housekeeping on the working platform surfaces (tools, mud).Inclement weather (snow, ice, rain)Falling objects on workersUnguarded work platform (tools not secured in a tool tray/container, no barricade below scaffold or toe board).Platform breakage.Striking objectsEspecially to the head, but also the arms, hips and legs.Precautionary Measures:Hard hats, good housekeeping,secure loose tools, remove snow and ice
8Scaffold Use Hazards Collapse of the structure Precautionary Measures: High windSome solid scaffold barriers and unsecured scaffold boards increase the potential.Secure bracket bolt(s) in a way that prevent their dislodgement (if used).Precautionary Measures:Scaffold components must be inspected prior to use.
9Scaffold Use Hazards Electrical contact Direct or indirect by proximity to high or low tension electric lines which are either aerial or building mounted.Power cords of portable tools and extension cords.
10Competent PersonTank Builders Scaffold must be supervised by a Competent Person.Who is a Competent Person?Capable of identifying existing and predictable hazardsHas authorization to take prompt corrective measures to eliminate the hazards ( (b)).
11Competent Person Inspection Frequency How often should the competent person inspect the scaffold system?Pre-Assembly InspectionAssembly InspectionSafe Use/AccessPre-shift InspectionStart of JobSet-up (jump/move)Daily
12Scaffold Component Inspection Check bolt size, grade and thatthe nut can’t back out (if used).Inspect Scaffold components for:Bent, cracked, deformed angles that can weaken the structure of the bracket.Cracked or deficient weldsImproper bolts and nuts (if used).Damaged scaffold components shall be tagged out of service and/or removed from the worksite.
13Scaffold General Requirements Scaffold must be capable of supporting its own weight and ___ maximum intended loadMust have Guardrail System4X
14Scaffold Handrails Guardrail System Top rail Smooth surface and 42 inch heightTaut wire rope or equivalent memberNo more than 3 inches of deflectionNote: State specific handrail height may apply
15Scaffold Handrails (Cont.) Guardrail System (Continued)Intermediate railInstalled midway between the top rail and the scaffold platformPosts
16Handrail Rating What is the rating for a standard top rail? Answer:_____ lbsWhat is the rating for a standard mid rail?What is the rating for a standard toe-board (if used)?20015050
17Handrail SafetyNever leave openings in scaffold platforms or guardrails.Do not lean against top rails or mid rails.Do not hang weld cables, hoses, electrical cables, etc. from top rails or mid rails, they should be hung from the scaffold guardrail posts.
18Installation Procedure Scaffolds shall be installed, moved, dismantled, or altered only under the supervision and direction of a competent person.
19Installation of Scaffold Clip The scaffold clip location shall not exceed 10 feet 6 inches.Inspect scaffold clip for proper level.
20Installation of Scaffold Clip Only Certified Welders shall weld scaffold clips to tanks.DO NOT leave a scaffold bracket clip partly welded, knock it off before leaving the work area.
21Installation of Scaffold Clip Must be welded across the entire topIs thisacceptable?
22Scaffold Clip Inspection Who must inspect the scaffold clip?The Competent Person on the worksiteWhen must the clip beinspected?Before attaching thescaffold bracket to thescaffold clip
23Scaffold Clip Inspection The Competent Person shall:Ensure weld slag is removed prior to inspectionInspect the welds for proper size and qualityInitial the weld after acceptance
24Scaffold Boards and Decking Use only approved scaffold boardsDO NOT rip or notch scaffold boardsEnsure boards and decking are not crackedRemove damaged boards from servicePlatforms shall be a minimum of 18” in width. For spans greater than 6 feet, the platform shall be equivalent to two (2) by 12 inch or three (3) 2 by 10 inch rough full dimensional lumber made of Douglas Fir or Southern Yellow Pine of select structural grade. Where other materials are used for the platform, they shall have equivalent strength.
27Scaffold Platform Installation Scaffold boards shall be supported at each scaffold bracket location with a minimum of ________ and a maximum of _________ of overhang.6 inches18 inchesScaffold planks shall extend a minimum of 6” over the scaffold bracket with a maximum extension of 18” unless the planks are secured on both ends to the bracket.Is this acceptable?
28Scaffold Platform Installation Overlap boards in one direction to prevent movement.Boards shall be installed against the scaffold post per regulation and to prevent shifting.
29Scaffold Platform Installation (Cont.) Max space between boards = 1 inch.Secure boards in windy environments to prevent shifting and to serve as a support to the tank shell (i.e., tie-wire, chain binder).
30Scaffold Platform Installation Opening between the scaffold platform and tank greater than 12 inches shall be closed by a safety line supported on the brackets.If spacing between the first line and the board or tank shell is greater than 12 inches, then a second line is required.A taut wire, synthetic rope or equivalent, supported on the scaffold brackets, shall be installed a the scaffold platform level between the innermost edge of the scaffold platform and the curved plate structure of the tank shell to serve as a safetyline in lieu of an inner guardrail system, where the space between the scaffold platform and the tank exceeds 12 inches. In the event the space on either side of the safetyline exceeds 12 inches, a second safetyline shall be appropriately placed to reduce the open space to less than 12 inches.
31Scaffold Platform Safety Do not store heavy tools and equipment on the scaffold.Place loose hand tools, debris and other small objects in tool containers secured to the scaffold.
32Overhead Hazard Barriers or Toeboards? Barriers (if used): Shall be established below the scaffold area designating potential overhead hazardYellow and black caution tape, flagging, or equivalent markingsToeboards (if used): Shall be capable of supporting 50 lbs. and be 3.5 inches high.
33Scaffold Bracket Review What do all acceptable scaffold brackets have in common?Scaffold brackets must support 4 times the intended loadWhen is tank builders scaffold considered complete?Includes a guardrail systemIncludes a platform with a minimum width of 18 inchesWhen wood planks are used, two 12-inch wide boards are required. In California, three 10-inch wide boards.
34Safe AccessIf the distance between the scaffold platform and the point of access or egress is greater than 24 inches,Then stairs, ladder(s) or a ramp shall be used for access.Temporary or permanent ladders used for scaffold access,Must have a rest platform at 35 foot maximum vertical intervalsOr include climbing fall protection on the ladder.Scaffold platforms more than 24” above or below the point of access shall be provided with a safe means of access/egress, such as stairs, ladders or ramps.Temporary or permanent ladders used for scaffold access must have a rest platform at 35-foot maximum vertical intervals or ladder climbing fall protection shall be used.
35Scaffold Tag System RED YELLOW GREEN Scaffold under construction, not completed (erectors only), when feasible use personal fall arrest system. Scaffold requires personal fall arrest system for use. Scaffold is complete and safe to use.
36Altering/Dismantling Procedure Altering/Dismantling operations shall be under the supervision of a Competent Person.When feasible, personal fall protection should be used when altering/dismantling scaffolds.Scaffold components shall not be dropped or thrown from elevated work locations.
37Scaffold Inspection Inspection shall include but is not limited to: The correct scaffold assemblyGuard rails in place and adequateScaffold platform is correctly planked and secured.Scaffold barricade erected under scaffold or toe boards installed.
38Scaffold Inspection Inspection shall include but is not limited to: Adequate scaffold access has been providedScaffold tags (Green, yellow,or red) are in place.Tools and equipment arestored safely on scaffold andscaffold is not overloaded.