How to find Change in Temperature for sheet metal

[McQSE]

I am trying to determine the change in temperature for a standing seam metal roof in order to complete thermal expansion calculations. I would appreciate any help.

 

[H2Lou]

The coefficient of thermal expansion for steel is 0.00000645in/in/deg F.

In plastic injection molds we always used this calculation for expansion in our hot runner systems.
based on 68f you could apply it to any temp range you wish.

Lou

 

[MintJulep]

desertfox,

The roof covering (or more specifically its attachment to the deck) has to cope with the full range of possible movement over the full seasonal temperature swing.

 

[desertfox]

hi MintJulep

I realise that the roof as to cope with the full temperature swing from summer to winter which may well be +100 deg C to -10 deg C however if we make a steel frame in a factory at 15 deg C then the temperature range or ranges would be (100-15) summer and (15-(-15)) winter so in the summer months to work out expansion of the frame it would be based 85 deg C range and in the winter the contraction would be based on a 30 deg range.
I suppose if you assumed 115 deg C range for both expansion and contraction it would be very conservative but I was never taught to do it that way.
Well I assume the OP as got the information he requires now at least.

regards

desertfox

 

[chicopee]

Is the sheet metal insulated? What would the temperatures in the space below the sheet metal be in summer and winter?
Can we assume a wind velocity at 15mph? Is the roof of corrugated sheet metal? So many questions!!