Of course it might be simpler to just build earthen ramps or raised docks(sunken ramps?)at each point of use if these are relativly fixed and just winch the unit on and off the truck/trailer. Rollers would help or even lubed cross beams like the Egyptians are rumored to have used to transport large stone blocks. Certainly safer than trying to lift the units off.
I have also seen slip axle lowboy trailers which allow a load to be winched on to the trailer bed at a low angle and then the axle subframe is pushed back under the trailer bed by the truck backing up and the two are pinned together for transport. Dana --- David Reid <[EMAIL PROTECTED]> wrote: > Marc, > What David T is saying here makes a lot of > sense and is probably > the most appropriate to the Phillipines. If you make > a couple of H frames > complete with outrigger tripod stays, use a couple > of connectors to join the > 2 H frames together, and a couple of chain blocks, > you can drive to where > you want the container located, set up your H > frames, lift the container > about 6", drive the truck out, and lower the > container. Uplifting and > shifting the container is obviously the reverse. You > could make the whole > framework of steel which all linked together using > lynch pins, which could > be stored on top of the container for transport, and > quickly erected once on > site. With 3 or 4 people you could have it all > unloaded in about 1/2 hr. > Very easy and very simple. By breaking it down into > components you could > make it so 2 men could do the whole job by > themselves if necessary. Lynch > pins would make it very easy. My only advice is to > make sure all welding is > properly done as you dont want any accidents. Also > use welded buttressing > (bracing) for added strength and support where > required. > B.r., David > > ----- Original Message ----- > From: David Teal <[EMAIL PROTECTED]> > To: <biofuel@yahoogroups.com> > Sent: Wednesday, May 23, 2001 11:08 PM > Subject: Re: [biofuel] Mobile BD plant > > > > John Brewer helpfully wrote: > > "Self loading trailers are used extensivly in > Australia. > > > > The Lifting arms ar on hydrolic rams and can be > adjusted to suit 20 & 40 > > foot containers, and can postion a 20 footer to > correctly position the > > weight distribution on the trailer" > > > > When I was working in rural Africa, such luxuries > were unheard of, but we > > managed to unload some fair sized loads with > improvised, cheap but > effective > > means. One of the better systems was to erect two > guyed goalpost frames > > from stout wood poles. Chain block hoists were > lashed to the middle of > each > > crossbar. The delivery truck would drive under > the gantry, the load was > > raised, and the truck would back out or drive > through. The load could > then > > be lowered onto skids on the ground and be winched > (Tirfor etc.) to its > > desired location. > > Of course, the goalpost gantry has to be proof > loaded first with dummy > loads > > like plywood boxes filled with sand (easy to > create and dismantle with > hand > > tools only). I reckon this approach is still > appropriate to places like > > Philippines, Marc. > > > > David Teal > > > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > Please do NOT send "unsubscribe" messages to the > list address. > > To unsubscribe, send an email to: > > [EMAIL PROTECTED] > > > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > > > > > > > > __________________________________________________ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/ Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
