Billboard design question

This would be a double sided 24’ x 8’ mounted to three 13’ 6.5"x8" I beams. What would you recommend to use for the frame? I would like it to be galvanized and it needs to withstand a 125mph wind velocity. The Letterville BullBoard: All Steel Billboard

Anyone build there own boards?

No one?

There are very few people who build their own signs. The liability is too great. They use either national, regional or local sign fabricators and installers. You can find these people with a quick google search. I’ve built or modified 300 signs and I’ve never built one myself – I"ve only used licensed, insured contractors.

Thanks Frank