Specifications:

Steel Security / Safety Grills shall be Birdview's Model (SSG) (size) as manufactured by Birdview Skylights, 201 Longhorn Road, Fort Worth, Texas 76179. The perimeter frame shall be 1 1/2" x 1 1/2" x 1/8" steel angle, with 1/2" solid steel bars welded at 8" centers across both directions. Grills shall be red oxide primed and pre-drilled for 1/4" lag bolts for mounting on roof curb or roof opening.