What are the foremost frequently cited serious violations of the concrete and masonry standard? the subsequent are OSHA’s top four followed by suggestions and protective measures you’ll use to form your jobsites safe.
1) Failure to guard employees from impalement – rebar not capped or covered. confirm that each one rebar is capped/covered with an approved protective device designed for this purpose like the hard plastic mushroom type caps which are designed to suit various sizes of rebar. Plastic or paper cups, orange traffic cones or tape aren’t acceptable means of protection. Prevent or limit your employees from working in areas where they might fall under or onto rebar. If this is often impossible , limit employee exposure to those areas by use of guardrails or other fall protection measures as outlined in Subpart M. Rebar are often bent as a protective measure, however this practice must be approved by an engineer, or the rebar are often covered with lumber (e.g., a 2 x 4 board).
2`) Failure to determine a limited access zone to limit the amount of workers within the zone where a masonry wall is under construction. The limited access zone (danger zone) is established to guard employees (in the immediate vicinity of latest wall construction) from being struck by flying/falling brick and block within the event of a wall collapse. Only those employees actually engaged in constructing the wall should be within this area. This area must be marked off by means of a sequence , rope, tape, or other material which will inform employees that they’re to not enter the zone (area). The zone must be adequate to the length of the wall to be constructed and extended out (from the wall’s base) a distance adequate to the peak of the wall to be constructed plus 4 feet. Therefore, if the wall to be constructed is 8 feet high and 40 feet long, the zone should be 12 feet x 40 feet.
3) Failure to brace unsupported section of masonry wall over 8 feet tall . a replacement masonry wall over 8 feet tall should be braced to guard against the hazard of collapse. The project engineer or competent person should determine how best to brace the wall. A typical masonry wall brace will include a vertical member, an inclined strut, stakes, and if necessary a strut brace. 2 x 10 scaffold planks are typically used because the vertical members and therefore the inclined strut and a couple of x 4s for stakes and strut braces. 2 x 4s and 2x 6s are inadequate for vertical members or inclined struts. All lumber used must be in serviceable condition. Finally, The American National Standards Institute (ANSI) recommends that the support or bracing be designed and/or performed under the supervision of a “qualified person” to face up to (at a minimum) 15 pounds per sq ft and people strong winds got to be considered.
4) Failure to possess the drawings or plans at the jobsite that indicate the jack layout and formwork placement. Confirm that a replica of the formwork drawings and plans are maintained at the jobsite for review by the employer, employees, and OSHA compliance personnel. Your formwork must be installed as shown on your drawings and/or plans.