Abstract: A concrete ramp is, in cross section, in the form of an inverted U and is made in sections. The form includes a base the upper surfaces of which are inclined relative to the horizontal at an angle wanted for tread surface of the ramp. A pair of inner and outer side walls are provided for each side of the base and then are shaped and dimensioned so that their upper edges are horizontal, the height of the inner walls less than that of the outer walls. The walls of each pair are hingedly connected to the base in a manner enabling the outer walls to swing outwardly and the inner walls to swing inwardly. Power operated devices supported by the base are operable to hold the inner walls vertically or to pull them inwardly. A plate is supported by the inner walls in a manner permitting it to be lowered or raised as the inner walls are swung into or out of their operative position.

Abstract: Baffles for septic tank ports are of a plastic stock that is inert with respect to reagents commonly existing in them. Each baffle is so dimensioned that its side edges engage the interior surfaces of the tank on opposite sides of incoming or exiting flow paths and is provided with laterally projecting resilient flanges spaced inwardly of the side edges and when seated against and secured to interior surfaces of the tank they maintain the side edges in linear contact with the interior of the tank. Each baffle is also provided at its upper end with hangers adjacent its side edges that extend over the top of a tank and become anchored in mortar when the tank cover is in place.