1) DWG for frame, there are deference between TTJ and Mitsui.
- For TTJ drawings was based on the structural framing, on design drawings they showing floor opening detail some steel was hide for clarity.
And, if we need more frame, we`ll have a comment with crowd mark.
– if need additional support for grating, please raise RFI
If we proceed based on your drawing, in any case span for grating is too long.
– please refer to standard drawings
2) For frame "Fire-Proof", are there any typical drawing for grating ?
– refer to standard drawings
(for example ; clearance between gtrating and column, or fire proof
steel structure)
3) You said that for stair tread, you`ll use grating.
– refer to standard drawings