Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Raft for flooded communities

346 views

Published on

A simple and affordable water craft for flooded communities.

Published in: Design, Business, Technology
  • Be the first to comment

  • Be the first to like this

Raft for flooded communities

  1. 1. FLEX-RAFT <ul><li>Flooded communities need a simple floating vehicle for moving people and/or things. Such a vehicle should have readily available parts, easy to transport to the flooded areas, and easy to assemble/disassemble on site. More importantly, it should be affordable. </li></ul><ul><li>Described in the next few slides is one such vehicle, named FLEX-RAFT, so named because (a) it can be made of 1, 2 or more basic components, and (b) if a raft is made up of 2 or more components, the assembly provides some sort of “balancing effect,” since the components “flex” with each other. </li></ul><ul><li>Hopefully each flood-prone barangay can have one or more of these FLEX-RAFT s ready before the onset of a flood season. </li></ul><ul><li>Many communities around Laguna de Bay might need this type of vehicle because they’re expected to be flooded for many months during the year. </li></ul>
  2. 2. Materials for a FLEX-RAFT (and where to get them) <ul><li>Marine plywood can be bought from a building materials store in 4’ x 8’ sheets; they come in ¼ ”, ½ ”, ¾ ” or 1” thickness. (I used the ½” plywood which costs around P700.) Ask the store to have plywood cut into two 4’ x 4’ sheets. </li></ul><ul><li>Surplus truck tire interior tubes can be bought from some auto repair service shops for about P300 each. </li></ul><ul><li>You need nylon rope – a 200-meter roll of #7 nylon rope costs about P280. </li></ul>
  3. 3. How to put together one component of FLEX-RAFT <ul><li>Sandpaper the edges of the plywood sheets and cut notches about 1 ft from each corner. (I used a round rasp file for this.) </li></ul><ul><li>You may want to apply a water sealant on both sides of the plywood sheet as well as on all edges and notches. </li></ul><ul><li>Cut two pieces of 28’ nylon rope to lash the tube onto the plywood as show in the picture. (Each rope is lashed diagonally across opposite corners.) </li></ul>
  4. 4. A two-component FLEX-RAFT <ul><li>A two-tube FLEX-RAFT can be assembled by simply tying together the two plywood pieces together with about 1-2 inches space between them. For this purpose cut 4 pieces of 12’ nylon rope; lash each rope around two notches on each side of the plywood sheets – the “tie joint” should be at the edge so that the ends of the ropes can be tied to join the two plywood pieces together. </li></ul>
  5. 5. A two-component FLEX-RAFT Shown assembled is the FLEX-RAFT in the right position for floating in water. (NOTE: The FLEX-RAFT is for limited use only in shallow water -- to be dragged and steered by one or more persons. However, it may also be used as a table, bed, or platform for storing things.)
  6. 6. Storing the FLEX-RAFT <ul><li>The FLEX-RAFT may be temporarily stored when not in use as shown. </li></ul><ul><li>After a flood season, the tubes may be deflated and the parts stored requiring only a small space. </li></ul>I made a two-tube FLEX-RAFT and donated this, thru an NGO, to a flooded town in Laguna de Bay but am still awaiting feedback on its usefulness. … Bill Torres

×