Bottom Pour. Crews place concrete for the bottom slab of pontoon NB. February 2007.Clearance. Ironworkers measure the clearance of rebar between wood forms on wall of pontoon YF. March 2007.Wall Pour. Crews place concrete for a wall on pontoon NB. April 2007.Top Rebar. Crews inspect rebar, ducts and clearances before the top deck of concrete is poured on pontoon NB. May 2007.<< Pontoon Photo Gallery