Positioning and Spotting Apparatus
Positioning is a tactical decision made before the pump is engaged. The first-arriving engine normally spots on the fire side of the structure, close enough to stretch an attack line but leaving room for the truck company, the aerial, medic units, and incoming mutual aid. Consider what the next apparatus will need: leave the front of the building open for the aerial, keep the hydrant and the FDC accessible, and do not block the driveway or the only access road. Spot so the pump panel is reachable, the supply line will not kink or run through traffic, and the apparatus can pull away without backing.
Scene blocking is its own skill. Position and angle the apparatus to shield the working area from traffic, with the larger apparatus placed farthest upstream so it absorbs the first impact. Set cones and flares starting well upstream of the scene per traffic-incident guidance, and turn wheels so the rig would deflect away from the work area if struck.
Avoid underground hazards: manhole covers, utility vaults, septic tanks, and storm drains can collapse under a loaded apparatus. Stay off soft ground, curbs, and steep side slopes, and look up for overhead wires before raising anything. Respect the collapse zone: about 1.5 times the building height, measured from the wall. An aerial must spot within reach of the objective with room to fully deploy outriggers and clear of wires.
Traps: parking on a manhole, blocking the FDC or sprinkler connection, spotting inside the collapse zone, and taking the spot the aerial needed. Example: a three-story building about 40 feet tall calls for a collapse zone of roughly 60 feet.