Dry Toilet, Version 2.0 June 17, 2015

Transcription

1 Dry Toilet, Version 2.0 June 17, 2015 Concrete Base When forming the concrete base, make sure it is same or slightly larger dimensions than the wooden base described below. The urine drain pipe is accommodated as shown, and J-bolts are put in place before concrete is poured. Base Frame Holes are drilled to pass J-bolts through. 1

2 Base Floor Side Elements Sides are best constructed on a table as a unit (photo at right) then assembled in position. Note that two identical sides are being constructed in photo, one on top of the other. The lower cross piece (2x4) is shown at a specified height from bottom of side piece. The top of this cross piece is to correspond to the top of the bottom of the back piece described below. In turn, the tops of these three pieces (bottom of back, two lower cross pieces of sides) form three sides of the frame for the bench (described later). To be sure these are lined up evenly at the same height, it may be best to leave the lower cross piece on each side only temporarily attached until the frame is fully assembled on the base. 2

3 Back Elements Like the sides, the back panel is best constructed on a bench, then assembled on the base with the sides. The back panel is shorter than sides, mounted flush with top of sides, leaving space below for rear hatch door. 3

4 Assembly of Sides and Back Once constructed, the two sides plus back panel are attached and put in place on the base. One method is to attach one side to back panel (equipped with temporary leg), forming an L-shape that will stand alone on base. Then other side can be added and the whole assembly attached to base. Be sure the tops of the first (2x4) horizontal cross pieces of the sides are aligned at the same height as the top of the bottom of the back (these form three sides of the base of bench, described later). 4

5 Roof Elements Two cross-pieces are added to support corrugated roofing material. (Cross piece for front comes with the Front Elements, below.) Front Elements The front elements can be added in place or, more easily, built as a unit on the bench. Insets shown above depict methods of attaching various members that will give a strong support to door frame, maintain a flat profile at approximately 13 bevel for roofing, and give a 6 rise for the user floor (described later). The members defining the door frame must be ripped to be as straight as possible on door sides (verticals could be as narrow as 3 but no less). 5

6 Interior Framing 6

7 Note that framing of user floor achieves a height of 6 by placing a custom-cut 2x4 (cut to 2x4.5 ) on top of a 2x2 (1.5x1.5 ) Holes are cut in user floor framing to accommodate plumbing (below). Plumbing PVC pipes are shown roughed in before user floor planks or bench planks are added. PVC fittings are shown as approximations; actual fittings will depend on actual position where vertical urine drain pipe enters. End points have rubber reducing couplings to accept flexible hose coming from toilet seat and urinal. The exact positions of these end points are determined once toilet seat and urinal are in place. 7

8 Roof, Bench and User Floor, Location of Toilet Seat & Urinal The roof material is translucent, corrugated plastic panels (usually sold in 26 widths, meant to overlap at least 2 ) mounted on closure strips (wooden strips about 2 wide and 2 feet long with ridges or waves that fit the corrugation). Should be cut to overhang in front several inches, in back 3-4 inches, sides in. Horizontal Wood Closure Strips (5-Pack) Toilet Seat Sketch above shows the urine-diverting toilet seat; inset shows how seat is supported by 2x4 bench cross-pieces. Photo at left indicates positioning. Position of toilet hole is important to enable easy use (a template for inscribing the hole for the toilet seat is printed on the side of the toilet shipping box; it is an oval shape 9¾" wide and 12¾" long). The edge of blue base of the toilet seat should be 9½" 10" from right-hand edge of bench top (11½" 12" measured from the edge of the hole itself). The edge of the blue base should be 1 in. from front of bench (3" measured from the edge of the hole). Accordingly, the cross members of the frame underneath must be placed not to interfere with toilet yet to support it as closely as possible. 8

9 The urine-diversion toilet seat extends approximately 9 down from seat level. The plumbing (connected to an external tank) is one reason the rear compartment must have plenty of room. Urinal The urinal is mounted on the left wall, its bottom a minimum of approximately 17 above the user floor (putting the lip at about 20 which is the same as in portapotties). Walls, Doors, Vent Pipe [Materials List coming next] 9