Metal bar for hoist

[pvr]

I have a host that can clamp onto a bar so I can raise / lower the winter wheels / tyres into their storage space in the "loft" of the outbuilding I have.

However, I want it to be flexible so I can move the hoist to different buildings and lift different things so I was thinking of fixing a metal bar in the roof space and have the hoist connected to that.

Not been able to locate something though, I almost need a very thin metal joist type shape I suppose that I can screw to the timbers. Or even multiple that I could fix at certain places (i.e. 1 meter lengths or so).

Anyone got any ideas where I could get something like that? The hoist has "clamps" type connectors that could go around a square / oblong structure.

[amacman]

Each wheel with tyre weighs around 25 kg so some 4"x2" ( 10cm x 5cm ) C16 grade timber will be ok to lift 1 or 2 wheels .or use 6"x2" to be extra safe . you can reinforce timber with 4mm thick metal bar , roof holding down straps might do , fixed along the sides .
difficult to say how to rig this without knowing the roof setup RE rafter / purlin / joist but if it can already support your weight and all the wheels , should be ok . any doubt consult an expert .

[pvr]

Thanks amacman.

The joists where the wheels are laying on, I have covered with weatherproofed chip board, so the weight is spread over a large area of the roof timbers.

In the eve of the roof there is a 15 * 4 cm timber running to which I wanted to fix the metal bar to attach the hoist to. It is that bar that I have not been able to locate (i.e. where to go, either in person or online).

It is a tiled roof, so the structure is quite sturdy as it has to support all the tiles at the moment.

[amacman]

http://www.montanstahl.de/en/rolled+sec ... s/standard

I found this whilst looking for roof truss pics .
also trying to show image of roof truss designs to get an idea of your roof but adding attachments is not enabled .

http://www.google.co.uk/imgres?imgurl=h ... Aw&dur=595

http://www.carpentry-pro-framer.com/roof-trusses.html

[pvr]

I have the "queen post" structure.

[amacman]

I found this via google . they sell box section and tube . the box section can have 3mm thick steel , they have stainless , this seems to be what you are looking for .

http://www.parkersteel.co.uk/Matrix/82/ ... ow+Section

or aluminum i beams
http://www.engineeringtoolbox.com/alumi ... _1326.html

or source a rear axle beam from a mondeo or similar from breakers .

be careful if you are mounting the beam to the top chord , or rafter as it`s known . they are usually designed for designated roof covering with a quantity of snow and high wind load so bear this in mind if you are up there moving wheels in a blizzard .
my initial suggestion of 10cmx5cm timber may be an easier option .
It seems we don`t have any structural engineers on the forum to provide some proper information .
good luck .