Don't you just love Beancounters. Just agree with him, then write a backside
covering memo crediting him with all the cost cutting engineering.

One of two things will happen. He will get cold feet when he realises that
he would be held responsible for any failure and you get a proper
installation or you are told to go ahead in which case my advice would be to
stay well clear of the tower and equipment room during a lightning storm.

I know not of any EIA/TIA standards. However, I  did a quick look around.

First port of call was http://www.furse.com but most of their site appears
to be under construction 8-(    (their paperware (CDROM) has some good
advice)   so I had a look at Polyphase and the following document gives a
concise summary of the issues.

http://www.polyphaser.com/pdf/PTD1011.pdf

Andrew Antennas http://www.andrew.com also have some useful information

For what it's worth my checklist would be

1. Are all four legs of the Tower connected to a Good Earth. (Use the tower
as a Lightning Rod)
2. Are the cables routed down the centre of the tower and NOT down one of
the legs (Minimise Induced Currents)
3. Are all cables taken through a metal bulkhead and is the protection
applied at that bulkhead (Don't let the Lightning get into the equipment
room)
4. Is the bulkhead directly connected to ground using a very big stranded
cable with no bends. (Keep Resistance and Inductance to earth an absolute
minimum).
5. Are the Equipment Racks bonded to the Entry Bulkhead
6. What about your power supplies. I worked on one station in Africa where a
Battery Room was built under the tower. To save money they routed the cables
to the first floor (that's the one above the Ground Floor 8-) )  equipment
room up one of the legs of the tower. Guess what happened when the tower got
struck by lightning.  Fizzle, Fizzle, Bang.

I would also apply protection at the base of the tower where the vertical
run down the tower changes to a horizontal run towards the building

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