Footer question

[blackknight81]

I have a 1,330 sq. ft. roof w/ a 65 lbs per sq. ft. live load rating with ground load of 1,500 lbs per sq. ft. I need to know the linear amount of footer needed to support this structure. The structure is a pole barn style of snow cover for a mobile home that measures 14' by 78'. I need all the footer to be on the sides of the mobile and none in front or back.

[Rich]

An actual length of 47' approximately (at 1' wide). Very rough calculations not taking into account any wind, earthquake reactions etc. I'm assuming the 65/sf is a snow load.