Ok, here is the set up:

The building is located at 126 North Main Street in Fon du Lac. It was the old Alliant Energy building. It is 2 stories tall. There is really one main level, but the parking garage is 2 stories and comprises a utilities room on the second level which is where the equipment room is. From there, there is roof access via a door on the second level out to the roof of level one. From there, there is a building ladder to level two and they roof mounted mast.

The mast on the roof is 2 1/2" cold galve pipe, about 15 - 20' max. It is secured to a sturdy partition on the building, (probably meant to shield utilities on the roof from ground view) with V plates in two locations. See Fig 1. It is extremely sturdy. Climbing is not easy, unless you like straddling poles. However, a small extension ladder leaned against it to reach the top level.

Fig 1 here you can see the roof mount partition fence and the rig/mast that is secured to it via v-plates.

What's on it now? See Fig 2. There are three runs of 1/2" heliax. 2 go about 3/4 of the way up to a split rig that has a 800mhz omni on each end of the mount. These are not in use, so we can use the heliax runs, trash the omnis and mounts, whatever. The 3rd run goes up to the top and is connected to a Crush Crap (Craft) 5 db puni omni. It is crooked BTW. Anyway, this is the little Al set up.

Fig 2 here you can see the mast with the little Al job omni at the top, and the 2 old 800mhz whips.

What I am proposing is removing the omni 800mhz gear, and the little Al omni and using two of the existing heliax runs, if possible to connect to two 180 degree sector panels, mounted back to back. See Fig 3.

Fig 3 here you can see the sector panels top mounted on the mast and the old gear removed.

So, as illustrated above, I would like to mount one sector to the mast, and from there we would use v-plates and a stand off pipe to mount the other sector behind it. This should give us decent separation. As an FYI, these are the same sector panels that are used in Burlington and Elkhorn, so you are quite familiar with them.

From here I intend to use two of the heliax runs to terminate back in the equipment room to two dc injectors, as there will be AMPs used. The AMPS (which are not pictured in the illustrations) will be mounted under each sector and secured to the mast and stand off, similar to the way we have done in the past. So there will need to be a jumper from each AMP to each sector. LMR 400 should be suffice, as I have plenty of this, and the connectors/tools. The AMP mount illustration below in Fig 4 should give you an idea that this is old news:

Fig 4 here you can see the LMR jumper going from the sector panel to the AMP. From the AMP heliax terminates at the radio side, indoors.

So, back to the internal part, where as the heliax will terminate in two dc injectors to power the AMPs, from the DC injectors we will be going to a 2 way splitter.

Fig 5 here you can see the 2 way splitter.

So two jumpers will be required again, this time from the splitter to the DC injectors. Then one N-MALE to Reverse TNC jumper from the splitter to their Cisco radio.

That is pretty much it for the setup.

The only other thing will be the garage mounted antenna, which will consist of a 16db conifer antenna and a short pre-made cable run. This run will go from the equipment room, though an existing hole in the wall which leads to the garage. We will need to affix the conifer on DS mount on the concrete block wall in the garage about 15-20' high. This should be the easiest part of the job.

All that is left is testing. The rigs that are going in the cars are for them to install. The car set ups consist of a 200mw PCMCIA card and 3db dongle, along with a fixed mag mounted 7 dbi antenna and pre-made 12' cable run. They will be installing these in the cars.