Hydraulic ram pumps and Sling Pumps

olled sheets of corrugated iron, joined together by mild steel angles (30 x 30 x 3 mm). These steelangles are fixed by spot welding to the corrugated sheets. Three of the sections have overlaps,being 30 mm wider on each side than one sixth of the circle, Fig. 5.29. The other three sections areexactly one sixth of the circumference. The example given in Fig. 5.29 shows a diameter of 4.00 mwith a height of 1.85 m. This makes a tank of 20 m³ capacity. The sections are bolted together withtimber spacers. These spacers are to be made after all the welding is done and the mould is to beassembled for testing. The timber spacers are made to cover up unequal parts of the mould andshould therefore be made specifically for each joint. They also serve to ease the dismantling of themould after the wall has been made. The overlapping of the mould sections are to prevent mortarpassing through during plastering. Test assembly should be performed on an even and horizontalbase, preferably a concrete floor. After all holes for bolts are drilled, the mould should be boltedtogether. The single parts of the assembled mould including the timber spacers must be markedclearly, so that after dismantling, reassembly is always done in the same way. It is best to numberthe parts and paint the numbers on the inside with oil paint. Do not forget to number the spacers aswell. The spacers should be made of hardwood and oiled afterwards. If carefully handled they canlast for some time, but are easily replaceable, Figs 5.28, 5.29.figure 5.28figure 5.295.2.3 Foundation slabDifferent soil conditions require different foundations. The foundation slab can be constructed asdescribed in Chapter 5.1. If welded reinforcement mesh is not available, it can be substituted by onelayer of fencing mesh combined with one layer of chicken wire. If reinforcement rods are available,any size above 4 mm diameter can be used to produce a mesh as shown in Fig. 5.30 by tying46