Garage Alteration.New Eyebrow [Allowable Deflection]

[RareBugTX]

Hello All:

Would like to know what deflection figures you use when altering a frame structure (in this case a garage) that will have a new load due to an above doorway new architectural feature (eyebrow, semicircular arched wall). Was thinking of L/360. I am investigating existing header [2]2x10's. Also, the eyebrow will also impose new load due to the curvature of that portion of the roof and snow drift.

Regards,

Rarebug R.A.

 

[tony1851]

What is the span?

 

[RareBugTX]

16'

 

[tony1851]

At 16' your aimed-for d would be around 1/2" (seems reasonable for garage doors) but would 2 no. 2x10s be enough? If the eyebrow is in the middle it will, as you say, cause a build-up of snow and potentially be a considerable extra point load around the centre of the beam.