1) Lay out the metal building package base rails according to recommendations and install ground anchors into pre-drilled holes, filling the holes with 2500psi concrete. 2) Wait at least 7 days for the concrete to cure before continuing assembly of the metal building. 3) For the concrete slab and footings, pour a monolithic slab that is 4 inches thicker than the building width and 6 inches extended, with 12 inch thick perimeter footings that are 16 inches wide reinforced with rebar.