· Proper use of this product is the responsibility of the user. User must be familiar with all appropriate codes and regulations. Meets CAL-OSHA Construction Safety Orders Section #1712 on impalement protection from concrete reinforcing bars The PCA is designed and tested according to California Safety orders 1712 which specifies 250# sand bag dropped from a height of 10ft onto two(2) pieces of construction grade fir 2” x 4”'s nailed together. · Federal OSHA limits the use to fall heights of not more than 6ft. Consult your state or federal OSHA plan for other limitations. · With tool belts, many workers exceed the test weight of 250#. This trough system should not be relied upon to protect a heavier worker falling from this height . · CAL-OSHA standards require minimum thickness of Two (2) 2" x 4" lumber (to 4" nominal thickness) by nailing two pieces together with at least 3 #8 common or 3 #8 coated nails. · Aways use lumber that is of the proper size, the proper grade, and the proper quality. · CAL-OSHA standards require protective cover adapters are spaced no greater than 4'-0” apart. · Covers. Protective cover adapters, and lumber should be inspected for damage. Damaged units are not to be used · All rebar in the row are to be lined up underneath the piece of lumber/trough. Use additional protective covers  ( Disc-10 or HH-M 's ) to protect rebar that does not stay centered under the lumber. · Do not use a PCA to connect the ends the trough/lumber. Each section of trough/lumber must extend between two (2) PCA's- at a maximum spacing of 4ft. · Troughs formed using Deslauriers PCA's are not fall protection. Troughs must not be used for handrails, steps, storage, etc. Troughs must be inspected to insure they have not been disturbed by workers or weather. Any exposed rebar shall cause all work stoppage until the exposed rebar is protected.