Safety Non-negotiables

The OSHA Non-Negotiable items in our proprietary Safety4Site™ program are:


  • Working 6 feet or greater with no fall protection (100% fall protection @ 6 feet or greater)
    Approved Fall Protection Includes:
    • Guardrails
    • PFAS
    • Warning Line System
    • Covers
    • Nets
  • Exposed holes large enough for a human to pass through, and is 6 feet or greater in depth, left unprotected or improperly protected.
  • Blatant, clear and/or intentional misuse of fall protection equipment or fall protection systems.
  • Altering or disabling any component of a fall protection system which exposes oneself or other workers to a fall 6 feet or greater. May include but not limited to: taking down a guardrail and not replacing it; taking down a warning line and not replacing it; altering someone's PFAS without permission.
  • Improperly using a step ladder:
    • Standing on very top
    • Straddling or sitting on top of ladder


  • Worker disregarding red danger tape/barrier. Crossing without proper authorization.
    If no danger exists, and the company that placed the tape or barrier did not remove, or improper markings are in place (i.e. caution tape), then accountability would not be triggered.
  • Dropping debris off building without proper chutes or alternate procedures approved by Messer.
  • Riding on equipment not designed for multiple passengers (catching a ride).
  • Using damaged equipment that may inadvertently fire (i.e. nail guns, etc.). Altering the equipment where the safety is by-passed. This may include but not limited to: disabling a guard on a chop saw; removing the guard on a hand grinder; disabling the safety muzzle of a pneumatic nailer or powder actuated tool; etc.
  • Exposing person(s) to overhead struck-by hazards by not barricading area on lower levels. This may include but not limited to: under brick or block laying, roofing, welding, demolition, wrecking forms, below holes being drilled in decks, flying and setting steel.


  • Working in unprotected trench or excavation. The competent person, employee and/or manager could be held accountable.
  • Unprotected - Excavation that is 5 feet or greater without proper protection defined in OSHA CFR 1926.652(a)(b)(c)(d)(e)(f)(g).
  • Not surveying for utilities before digging. Competent Person could be held accountable.
  • Operator not barricading/protecting swing radius and/or pinch points. Main focus is on stationary equipment such as cranes and drill rigs. May also include other equipment that poses a hazard of crushing a person by the placement of the equipment (next to a building or other piece of equipment, where other workers are present).
  • Operator exposing employee(s) to an overhead load while working in an excavation. This may include but not limited to: loaded excavator bucket; empty excavator bucket; load that is strapped to an excavator bucket; etc.
  • Reckless operation of equipment (i.e. horseplay, operation too close to a trench, exceeding the limitations of the machine, bypassing any safety devices, etc.).


  • Working within 10 feet from power lines. (Equipment, ladders, scaffolding, tools, etc.) Note: In transit with no load and boom lowered, the equipment clearance shall be a minimum of 4 feet for voltages less than 50kV.
  • Exposing oneself or others to live bare electrical conductors (i.e. open electrical panels, junction boxes, missing knock outs, etc.) >50 volts.
  • Working on live electric without the proper PPE and procedures.
  • All live work must be discussed with Messer prior to the work being performed.
  • The unauthorized altering, by-passing or removing any guards, locks, tags, or any other safety device protecting persons from live electric.
  • When using temporary wiring including extension cords, for construction or maintenance purposes on active construction sites, the worker must be protected by a GFCI.