In my other, much smaller workshop (currently hut) I want to replace the
huge 6" timbers that form the roof with smaller steel beams to gain a
bit more headroom, and to get rid of a wooden pillar that cuts the front
openning in two. At the same time I was to use these for a light duty
gantry for engines etc, max lift of around 500kg (about 1000lbs I
think??).
The roof is sloping about 6 inches over 14 foot. The 3 walls are blocks,
and the front is open. This is the plan so far:
1. a steel beam right across the open front
2. 2 steel beams about 3 foot in from each side wall to support the
roof. These will hang from the front beam, and sit on 'hangers' on the
rear wall. This should hopefully replace the big wooden beams and
pillar.
3. another beam hanging from the 2 roof supports on roller trolley
things, and the winch can hang from that. This beam will naturally want
to roll downhill, so a couple of chains or wires needed to keep it where
its needed.
Now my questions:
1. anything fundamentally wrong with this plan?
2. Any recommendations on what size of beams to use for the 3 different
jobs? I have 4 1/2" max height for the beam at the front, and no
particular limit for the others other than wanting to maximise headroom.
2a. Does anyone know of a formula I can use to work this sort of thing
out. I will want to build a gantry in the big workshop as well, and also
a 25' bridge over a stream, so I'm into beams at the moment :-).
Thanks for your help,
Conrad
Ps, I chose life, the hydraulic power pack now lives outside in a little
hut.
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