Wednesday, January 27, 2010

Bridge Construction & Clino

Bridge Construction

We felled (11/1/10) a small tree to use for the bridge we need to build.  It needs to sit for a few weeks after debarking to allow it to dry out.  I feel this is is a much more sustainable approach, coppicing a tree that's close by, rather then using a CCA treated log of unknown provenance.  The tree will regenerate and live to fight another day, we used only our sweat and an axe to fell it.

I was getting impatient awaiting the logs to finish drying, and talked Toni into digging the footings and placing the logs on Australia day, ready to go for the decking.  This pic shows the logs prior to moving into place, they were surprisingly heavy but with a bit of mechanical advantage from the leverage of the star pickets we managed to get them into place easily enough, only need a little more sweat, some cursing and some muscle work.

and now they're in place, sitting on masonry blocks as footing, with rocks from the creek piled in around them to hold then in place.  They have been levelled and awaiting the decking, at least another week of drying, unless I get really impatient.

We managed to scrounge some old hardwood tongue and groove timber to re-use as bridge decking, this will be the sturdiest MTB bridge in Australia at this rate.

The decking has all been cut to size (600mm) and is ready to go, all I need now is to go to Bunnings to get the 50mm fastners I need.

Bit the bullet and ordered a clino yesterday, $250 (ouch) but it's the most necessary tool in sustainable trail construction, and the next stage of our trail network is contour trail across a steep(ish) sideslope, where a clino is a MUST have to avoid building an unsustainable trail.

Should arrive in the next few days, so no excuses for not starting to mark out some more trail I guess, aside from the 1000 other jobs I have to do :) and then plenty of digging !

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