Metal clad shed construction

[bonepyro]

I need to build a new garden shed to replace and enlarge the rickety existing one.

The one currently in place is a timber frame with corrugated iron cladding all painted a dark green/brown colour. I have in mind to keep the exterior appearance pretty similar and use either corrugated iron or box profile sheeting.

Now my question relates to the internal frame, as I think rather than building a new timber frame, it may be easier and quicker to make the frame using a mix of cee section and z purlins. However other than having seen them in place I am struggling to find any online reference to construction technique or design guides. Can anyone point me to a link that might help, or build these regularly with first hand knowledge of the subject they would be happy to share.

The new shed will be around 20' x 12' with a ridge height of around 9'. Any ideas on how to make the roof trusses welcomed. Ideally would like the interior space to be as open as possible so perhaps only a truss either end at the gable and one in the middle.

Will stick up a picture shortly of one I have seen online that 'looks' like the kind of space I imagine.

 

[addjunkie]

Id be surprised if you can beat a kit price, buying all the gear.
Will condensation not be a huge issue

 

[bonepyro]

This is the kind of thing I have in mind.

Not so worried about condensation as will not be putting any heating in there, it is just to store garden equipment and furniture, not a working space.

 

[gaz1]

yes build it out of box section and angle iron my shed uses angle irons for roof

http://www.mig-welding.co.uk/forum/threads/garage-roof.70723/page-2#post-952736

http://www.mig-welding.co.uk/forum/threads/sectional-garage.70055/#post-937958

 

[slim_boy_fat]

it is just to store garden equipment and furniture

Both of which will attract damp from the atmosphere as the building heats and cools with the weather.

 

[addjunkie]

Wood will be more storage friendly

 

[cumbriasteve]

My workshop has a steel roof and when the weather is right...frosty but sunny morning you needed waterproofs to go in the building, the dripping condensation was terrible and that was when no one was in there and no heat at all on.

I had to install an insulated ceiling to stop it and I suspect it's still doing it out of sight and will return to haunt me one day.

It was a nightmare mistake I will never make again.

 

[macandmoss]

helped my friend replace his asbestos roof on his unit which is qiute big , he used the insulated ones and they seem to work even though its just a fine coating on the back , he has six see through skylight sheets in as well , now when you walk in his unit the floor is dry and no indoor rain but under each skylight one there is always a huge puddle