Position your wood frame over your concrete slab in its final position. Measure and mark a spot every 12 inches on your wood frame. These marks should be centered on your wood frame from the edges. Use your tape measure to ensure this.
Drill a hole through each of your markings on the wood frame and into the concrete. Use a drill bit the same size as your anchoring bolts.
Pound your anchoring bolts into the holes on the wood frame with your hammer until they are 1/4 inch above the frame. Tighten the bolts using your wrench until they are snug. Do not over-tighten the bolts, because they may become loose in the concrete.