B-Line SB5764140YZ Eaton series open frame racks, Steel, Yellow zinc, 12-24 panel mounting holes, 45 mounting spaces, Top channel style, Seismic Zone 4, network bay closed duct rack, ASTM A570

Yes. The SB5764140YZ is built as a Seismic Zone 4 network bay closed duct rack, so it is the version to specify where the structural drawings call for Zone 4 anchorage. It is also UL Listed. Anchorage hardware and floor attachment still have to follow the engineer's detail for the building.

45 mounting spaces, which is 45 rack units of usable panel space. That is a tall bay, so plan for switch and patch panel stacking plus the vertical duct rather than treating it like a standard 45U two-post.

The rails carry 12-24 panel mounting holes, tapped thread, so you mount gear with 12-24 rack screws directly. No cage nuts or square-hole clips needed. If your equipment came with M6 or 10-32 hardware, order 12-24 screws to match.

ASTM A570 grade 33 steel with a yellow zinc finish. Yellow zinc gives corrosion protection for indoor conditioned and general indoor use. It is not a hot dip or powder coat exterior finish, so keep it out of wet, washdown, or outdoor locations.

It is a network bay with an integrated closed vertical duct, so cable runs are enclosed as they travel up the bay instead of being lashed to the outside of an open frame. That keeps patch cord bundles out of sight and protected between the horizontal managers. If you only need a plain two-post frame for switches and do not need managed enclosed cable pathway, a standard open frame rack without the duct is the simpler buy.

Yes, top channel style. The channel across the top of the bay is the attachment point for ladder rack or runway coming off the wall or ceiling, so you can tie the bay into an overhead cable pathway without adding a separate crossbar.

Order by manufacturer part number SB5764140YZ from Eaton's B-Line series. The YZ suffix identifies the yellow zinc finish, so a rack of the same frame in another finish carries a different number.