JRS: In article , seen in
news:uk.sci.astronomy, Maurice Gavin posted at Tue,
1 Jul 2003 18:54:53 :-
We need some practical advise re mounting telescopes on a large flat
roof [immediately overlooking fields to the E/S/W] to minimises
potential vibration mainly from dozens of observers walking about.

...

Presumably you should protect the existing roofing from any routine
contact with observers' footwear; and, if it is like roofs I've seen,
/vice versa/.

Also you should spread the load for any equipment, perhaps by laying
paving stones under each leg.

Remember wind loading on anything permanently-placed.

If you can locate a generous supply of close-boarded pallets, you might
be able to floor the roof relatively rapidly.

Think also about site security.

--
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