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5/1/2015OSHA Office of Training & Education 1. 5/1/2015OSHA Office of Training & Education 2 Subpart Q - Concrete & Masonry Construction (1926.700 - 706)

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Presentation on theme: "5/1/2015OSHA Office of Training & Education 1. 5/1/2015OSHA Office of Training & Education 2 Subpart Q - Concrete & Masonry Construction (1926.700 - 706)"— Presentation transcript:

1 5/1/2015OSHA Office of Training & Education 1

2 5/1/2015OSHA Office of Training & Education 2 Subpart Q - Concrete & Masonry Construction ( ) Reinforcing steel - Guarding Masonry walls - Bracing Masonry construction - Limited access zone

3 5/1/2015OSHA Office of Training & Education 3 Concrete and Masonry Revisions to standard during the 1990’s Standard expands/toughens protection against wall collapse –Revised bracing requirements –Requires ‘limited access zones’ Standard focus on guarding of exposed reinforcing steel

4 5/1/2015OSHA Office of Training & Education 4

5 5/1/2015OSHA Office of Training & Education 5

6 5/1/2015OSHA Office of Training & Education 6 Cast-in-Place Concrete Cast in place concrete must be capable of supporting, without failure: vertical loads lateral loads Use ANSI A Drawings and plans Must be on jobsite Must include all revisions

7 5/1/2015OSHA Office of Training & Education 7 Vertical slip-form operation

8 5/1/2015OSHA Office of Training & Education 8 51 killed 170 feet above ground Entire form peeled away from newly placed concrete Cooling Tower St. Mary’s West Virginia 1978

9 5/1/2015OSHA Office of Training & Education 9 Jump forms atop the St. Mary’s structure tore loose, pulling work platforms and concrete down inside the tower.

10 5/1/2015OSHA Office of Training & Education 10 Wreckage 168 feet below the top of the St. Mary’s tower being picked apart by investigators looking for clues.

11 5/1/2015OSHA Office of Training & Education 11 No construction loads placed on concrete structure unless: –Employer determines safe to do so –Person qualified in industrial design –Structure capable of supporting loads General Requirements

12 5/1/2015OSHA Office of Training & Education 12 Concrete and Masonry All reinforcing steel on which an employee may fall must be guarded.

13 5/1/2015OSHA Office of Training & Education 13 Concrete and Masonry EVERY rebar must be capped You are looking at a fine of somewhere between 45 and 250 dollars per instance

14 5/1/2015OSHA Office of Training & Education 14

15 5/1/2015OSHA Office of Training & Education 15

16 5/1/2015OSHA Office of Training & Education 16 Concrete Bucket No employee is ever permitted to ride concrete buckets

17 5/1/2015OSHA Office of Training & Education 17 Working under loads No employee shall work under concrete bucket while: –Bucket is being raised –Bucket is being lowered –To the extent practical… route buckets so no employees or the fewest number are exposed

18 5/1/2015OSHA Office of Training & Education 18 If equipped with hydraulic or pneumatic gates, must: Have safety device to prevent premature or accidental dumping. Shall be designed to prevent concrete from hanging up on top & sides. Concrete Buckets

19 5/1/2015OSHA Office of Training & Education 19

20 5/1/2015OSHA Office of Training & Education 20 Concrete pumping systems Provided with pipe supports designed for 100% overload Compressed air hoses on pumping systems: –Positive fail-safe joint connectors –Prevent separation of sections while pressurized

21 5/1/2015OSHA Office of Training & Education 21 Personal Protective Equipment If pneumatic hose is used to pump cement sand and water mixture Employees must wear head and face and eye protection.

22 5/1/2015OSHA Office of Training & Education 22

23 5/1/2015OSHA Office of Training & Education 23 Bulk cement storage safety Storage bins and silos: –Conical or tapered bottoms Concrete Mixers: Mechanical device to clear material Guardrails on each side No employee permitted to enter unless ejection system shut down / locked & tagged out so system can’t operate.

24 5/1/2015OSHA Office of Training & Education 24 Power concrete trowels Dead-man control: Stop automatically when hand(s) are released from control

25 5/1/2015OSHA Office of Training & Education 25 Bull floats If handles could contact electrical conductors they must be of the non- conductive type

26 5/1/2015OSHA Office of Training & Education 26 Guarded with semi-circular enclosure over blade Enclosure must provide for retaining flying blade fragments

27 5/1/2015OSHA Office of Training & Education 27

28 5/1/2015OSHA Office of Training & Education 28 Do You See Any Violations??

29 5/1/2015OSHA Office of Training & Education 29 Rods or pipes on which jacks climb: –Designed for that purpose –No excessive distortion during jacking –Provided with scaffolds where employees are required to pass Vertical slip forms

30 5/1/2015OSHA Office of Training & Education 30 Forms and shores (Except those used for slabs on grade & slip forms): –Not removed until Employer determines concrete has gained sufficient strength to support its weight and superimposed loads Removal of formwork

31 5/1/2015OSHA Office of Training & Education 31 CFR Masonry Construction.

32 Concrete and Masonry Masonry wall construction –Need a “limited access zone”

33 5/1/2015OSHA Office of Training & Education 33 Limited Access Zone (LAZ) Shall be established whenever masonry wall is being constructed Prior to start of wall construction

34 Limited Access Zone (LAZ) –Height of wall plus 4’ –Entire length of wall –On un- scaffold side –Restricted entry Masons ONLY!

35 5/1/2015OSHA Office of Training & Education 35 Shall remain in place until wall is supported If wall is over 8’ tall it must be braced Bracing must remain until permanent support structures are in place Limited Access Zone

36 5/1/2015OSHA Office of Training & Education 36


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