Roof tile in high wind zone

[ronster]

I was asked by a code reviewer to provide backup for the attachment of a tile roof to the roof sheathing in a 120mph wind zone. The supplier does does not have any engineering backup, just a spec calling for 2 nails or screws per tile. Anyone out there ever design a roof tile attachment?
Short of any approved method I plan to design for uplift on exposed portion of tile, subtract the weight of tile and tile resting over it, and figure upift using prying action as the nails are 1.5" from the top end of the tile.

 

[UcfSE]

I would assume the tile acts as a rigid member and use force and moment equilibrium to find the uplift at the nail. I have used that for siding attachment in 130 mph Exp C zone before, it seems to work. That only checks the attachment, it doesn't check the strength of the tile for the bending. Roof tile is probably ok in that respect though.

 

[FSS]

I would go back to manufacturer for required info. Attachment methods are important as to how they achieve their rated capacities.