Bar Metal Grating

[GTrinh97]

I am looking for the dead load of this grating to design the structure below. I haven't been able to find any resources for this specific size of grating. Grating (field note):
1. Width: 5' - 7 1/2"
2. Span: 26' - 3/8"
3. Bearing Bar Depth: 5 1/2"
4. Bearing Bar Thickness: 1/4"
5. Bearing Bar Spacing: 8"

6. Cross Bar Spacing: 4"
7. Cross Bar Depth - Perpendicular with Bearing Bar: 2"
8. Cross Bar Depth - Parallel with Bearing Bar: 1"