Where to buy V groove castors

[cventer]

I am planning a project to cut a hole in the roof of my flatroof garge and add a slide off flat roof section.

Kind of like this one here:

http://www.hiddenloft.com/obs/28obs.jpg
http://www.hiddenloft.com/obs/16obs.jpg

Wondering where to buy V groove castors from and also suggestions on what material to use on the roof itself. It needs to be flat and low profile just like in pics above

Also was thinking of maybe C channel instead of V groove but not sure wat castors/wheels I would need to ue for C channels.

Other challenge I have is the roof itself is currently corrugated sheets of roofing tin. The runout tracks and frame will need to sit on top of this corrugated roof, so trying to figure out how I will seal the sides.

See badly drawn pic attached below.

Any help or suggestions would be appreciate

[Tandum]

I got u-groove wheels from here (http://www.smallparts.com.au/store/categories/u+groove/all/pics/). I used them on my dome as per the pic.
I think pmrid used the same wheels to get his roll-off roof running better. We both used them with flatbar steel. I think he attached the flatbar to the shed and the wheels to the roof.

Check out the stratco website for roofing/clading. They make some very low profile stuff now.

[cohiba]

Blackwoods stock them in various diameters, they run on standard 90 degree steel strip

[Moon]

http://www.richmondau.com/

[cventer]

Thanks. That place in richmond looks like just the ticket

[cventer]

Ok Added some more pictures of what I am trying to do.

First Pic shows the current roof and a rough sketch of where i want the rolloff to start from and Which direction the runout tracks will run

Seconds pic shows the problem i have with sealing this design from water.
Roof has gradual slope towards the camera and water runs down the corrugated grooves. The picture called sealIssue shows that gap b is what will need sealing somehow to stop water running into the garage.

Gap a does not matter as it just has runout tracks on top.

I was also thinking about roller options. 1st and 2nd are probably easiest and just involve grooved castors on some inverted T galv steel

Problem with this design is you will have to lock down the roof from inside somehow as nothing stops it lifting off

Last option is to have some wheels that run within a U channel section. Issue with this is lateral side to side movement will cause binding and may need side wheels to keep in place to stop binding.

so some questions.

1. What roller option have those who have done this sort of thing settled on and why ?

2. How would I go about sealing the gap b in the picture

3. What kind of timber is best for the runout beams (label B)?

4. What timber to use for roof framing that corruguated Gal sheet will sit on (label C)

4. What timber or clading should be used to protect the sides of the roof etc... to stop the weather getting in. (label A)

[mswhin63]

Bunnings have a selection of Window runners. I constantly have a look at some of the range to see if i can apply them.

[snowyskiesau]

For sealing the corrugated iron, you can get preshaped foam infil strips that should do the job, Bunnings probably carry these.

For V bearings, you could try VXB in the US (http://vxb.com). They stock both V groove and U groove bearings. Good prices and quick service.

[cventer]

Thanks everyone. I have moved some of this post to a new topic as original one on where to buy V groove has now been answered.

New topic on design ideas is here: http://www.iceinspace.com.au/forum/showthread.php?t=78647