PV panel system attachment to masonry parapet

[DCStructures]

I have a solar contractor client who wants to attach their PV panels to the masonry parapet of a row house through a system in which ultimately the wind uplift load is applied to the parapet by way of threaded rods which are drilled horizontally through the parapet. The height of the parapet varies, but regardless, there does not seem to be enough masonry self weight dead load above the rods to counteract the wind uplift. I cannot see any other way to make this connection work. Has anyone seen a masonry parapet loaded in such a way? Or does anyone see a solution to this before I tell my client that it's just not feasible. Thanks in advance.

 

[MotorCity]

A few thoughts....

1. Consider the tributary width of the parapet you are using to resist uplift. If you can justify a wider portion of the parapet participating in uplift resistance, it may be ok.

2. Consider the tension resistance of the mortar, its not much but it may help. Find out the modulus of rupture of the mortar.

3. Lower the horizontal rods to engage more of the parapet dead weight

4. Resist the uplift by attaching all or a portion of the panels to the roof

5. Install a saddle (upside down U-shape) over the parapet and make as wide as necessary to distribute the load over a wider portion of the parapet

 

[DCStructures]

Thanks motorcity! Good ideas.