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difflock

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Everything posted by difflock

  1. difflock
    Thanks Woods, but no need. As I said I figger the top compression, bottom tension effect would only produce shearing force along the midline. and if only carrying 100kg (& guessing there) very very unlikely to be sufficient shear force to be an issue. Essentially to achieve virtually "zero" sag or or mid beam deflection the beam requires to be very stiff=very deep in section, and way way way "over engineered" in terms of load carrying in normal circumstances. I seem to recall leastwise. regards marcus
  2. difflock
    I am, two identical round topped sections (each 183mm by103mm) glued together bottom to bottom, to produce a 366mm deep by 103mm wide beam with a curved profile to the top and bottom. Might even run a plastic coated steel wire rope up the middle,(there will be a 40mm by 40mm box betwixt and between, to prestress the beam. being aware of the dangers of galvanic corrisson. cheers m ps see http://www.commercialbodybuilding.co.uk/pdfs/JA-Aluminium.pdf page 40 ending 5564 but dammn they have discontinued my preferred round topped section on page 43(i just remembered) so ignore the round topped bit and the wire rope prestressing. ps Ah "tweeked" my back so lying in bed while the "Sun splits the stones" outside gerrr!
  3. difflock
    Graham, I went to Essex to view a "Stenner" type saw, all dismantled, but apparently all there, with a fresh looking 3PH Motor. Since I had misgivings about the Vendor, I did not deal. BUT How much crown should there be on the band wheels. I was told these wheels had been recrowned shortly before the saw fell into disuse. But with a wee 6" steel rule I fished from my pocket, I could discern absolutly no camber across the 4" width. I know it would be slight, but should surely be discernable to a keen naked eye in good daylight? Or am I wrang? cheers marcus
  4. difflock
    Ca? (wrt Manuel of Fawlty Towers) I no unnerstann? PS An American DIY airplane building site was heavy on the sanding roughning prior to adhesive application, it is the "again when wet" bit I dont follow. PPS Ah just realized I will need a bevel gearbox to rotate the sawblade shaft around. getting blinking kinda complicated. m
  5. difflock
    cough cough Seriously considering using double sided "Gaffer" tape:thumbup: as wot is used within industry. All I need is sommat with a high shear strength rating. Or a metawotsits acid based self priming epoxy. but the tape ud be cleaner. Rather in the first instance find a suitable depth section "of a piece" as opposed to gluing/riveting/bolting. Currently looking for a suitable petrol engine. And a 3 or 5 toothed 600mm dia ripping blade. Need to get all of the constituant pieces lined up first.
  6. difflock
    Sorry, my scales max out at 300kg. So 305kg not poss. The higher payload crane scales wans bes giy pricey.
  7. difflock
    Modulus of Elasticity - Young Modulus for some common Materials and Calculator for Engineers - Area Moment of Inertia, centroid, section modulus and Wl*l*l/48EI=deflection Which geid me 24mm for 100kg load in the middle o a 10m span(single beam) And also gave 4mm for 100kg load in the middle of a 10m span(doubled up) Which should suffice. Which sounds plausible.(to a somewhat failed Civil Engineer) Next, research into the glue to stick the aluminium beams together (Stixall is a starter option) better consult me Ex Loctite senior engineer mate. Marcus
  8. difflock
    Ye cud be waiting a year or two. Based on past experiences. Still not quite got the daughters en-suite finished after 12 or 13 years. cheers & thanks for the interest. PS Petrol engine about 25HP (simplest solution) Or a hydraulic motor driven off a diesel powered hyd pump. (or scrap diesel/hyd powered lawnmower) which could also power a log splitter. Or a 3PH electric motor, but need a 3ph genny. Which is it to be? Currently trying to remember my Uni calcs for beam stiffness/deflection under load. Prob better finding an intersnot site though
  9. difflock
    Hey, Woods, I guessed that:lol: PS I reckon Broonie tinks I harvest Balsa wood fir firing:001_tt2: cheers m
  10. difflock
    6 No. bundles @ 145kg, 150kg, 160kg, 165kg, 185kg and 185kg Ave 165kg = 330kg/m3 for split and billeted Lodgepole Pine. Guessing 20-25% m/c Still waiting for me moisture meter. And still need to "dunk" for displaced volume. Just need a big enough tank. m
  11. difflock
    Broonie, Thanks J Adams can supply, a suitable section at £30.00/£32.50/m run in 10.5m lengths Times 2 for stiffness (stuck together back to back) = £680.00 (VAT incl) = gulp + engine + blade + various gubbins Better do a wee drawing before I start spending.
  12. difflock
    Hey, Kevin, iffen ye keep the Mrs. pregnant, her will always be warm. Twas the only Time (times by 2) my wife (who suffers from Renaulds syndrome or somesuch) Was absolutly positively toasty warm in bed. Heating oil might be cheaper though.
  13. difflock
    Excerpt per Kevin as above "I learnt a key lesson about not splitting contractors on one job, they blamed each other for set up issues and argued about who was liable for rectification. " boy oh boy, did I not learn that lesson, bigtime, when building a dwelling-hoouse "by the Grip"
  14. difflock
    :thumbup:
  15. difflock
    Am proper jealous o that neat set-up Kevin
  16. difflock
    Ah! My kinda thinking Forestgough. Thanks Marcus
  17. difflock
    Me, being lazy (and most importantly OWNING the winch) ALWAYS drag on the drum. This was the very reason I bought the electro-hydraulic. See a soft spot ahead, click the winch to free-spool, drive through empty, drop the butt-plate and winch in again. A trifle tedious, but otherwise unworkable, in my ground conditions. Just need a longer wire. m
  18. difflock
    Thanks all, could be another summer project(after I get all the other gestating, aborted and still-born summer projects finished) I was simply looking at "Turbosaws" set-up and cannot see why we are expected to pay £5,000.00 (£4800 +carr) for an extruded aluminium "T" beam and a hinge mechanism, without an engine. It sure aint Rocket Science. Regards, Marcus
  19. difflock
    Oh!, see Metsec Lattice Beams Ltd getting warm folks
  20. difflock
    Thanks Agrimog, twas looking on der intersnot last night, without much success. Figgered there hadda be sommat suitable, "off the shelf" cheers m
  21. difflock
    Heavy section aluminium preferably, if needs be several sections welded together. Or do I get the cousin to fold heavy gauge sheet aluminium and weld into a beam. Nervous of distortion with that approach mind. Thought of three alum ladders set in a triangular format. but not long enough (that I can find) Erm An old triangular lattice style galv mild steel radio/windmill "mast" to carry a runner (or two) m
  22. difflock

    New knife

    difflock replied to magwick's topic in The Lounge

    What steel is he using?
  23. difflock
    Am now well offended Broonie, Humph!
  24. difflock
    PPS Just remember I intended to source a "mid range" moisture meter. About £50.00 ish Then I will "know" :001_rolleyes:even more PPPPS I really really really, really really really, should be winching trees out of the Moss in this dry weather:blushing: m
  25. difflock
    Yes, indeed MAC mak guid Trailers see link MAC Trailers - Agricultural & Commercial Trailer Manufacturers: Low Loaders Pun intended btw

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