Yes, the studs are 90 x 45 (after converting seems to be 1.5" x 3.5"). The 18RU is overkill for my needs, I could have chosen a 12RU (I think). I just wanted the extra space. I'll have 3 patch panel rows. One of the patch panel rows will be solely devoted to CCTV; have wired for 17 camera positions. The other two patch panel rows are for the other data points and wireless access points around the house. Throughout the house to each socket on a wall I ran two or three cables. In the main living areas, I also installed sockets on opposing walls, makes for changing furniture around, especially the TV, easier. Not all data points need to be active. I've already got, not setup or used yet, a Unifi 500 watt 24 port POE switch and have a Unifi Dream Machine on order. In time, I will need another switch, will purchase another 24 port, non-POE switch. The rack will also house the ISP terminating device and coax amplified splitter. On top of this, on the bottom shelf a slim line type style PC for
Blue Iris.
I haven't calculated the theoretical maximum weight (don't know how to) but I'm satisfied that it will cater for my equipment.