James
Any cover that is exposed to weather will suffer with time, so you need to state upfront that refurbishment/replacement will be necessary down the road. Plex will etch and scratch, and there are of course limits on a span since it has little structural strength. The biggest problem is always moisture, both in the form of drainage and condensation. Even if you control for drainage, condensation will form on the underside of the plex unless adequate ventilation is provided. I have seen too many of these covers become opaque from moisture and mold. Providing easy mechanisms for replacement of plex is important. Entropy is a wonderful thing!
Bob Genheimer
George Rieveschl Curator of Archaeology
Cincinnati Museum Center
1301 Western Avenue
Cincinnati, Ohio 45203
513-455-7161
513-455-7169 fax
-----Original Message-----
From: HISTORICAL ARCHAEOLOGY [mailto:[log in to unmask]]On Behalf Of
McAlexander, William
Sent: Thursday, February 19, 2009 9:27 AM
To: [log in to unmask]
Subject: Re: Query
James,
I am unsure of how much you would like to have available for viewing.
However, if memory serves correctly, in Philadelphia at Benjamin
Franklin's home outside sub-walkway architectural features were encased
with thick glass for viewing. I believe that a similar thing was done
for grave markers in the church at Jamestown. I have also seen the use
of glass encasing features on a prehistoric site about 15-20 years ago.
I hope this helps.
William E. McAlexander Jr.
Environmental Division
Arkansas State Highway and Transportation Department
Little Rock, Ar 72209
(501) 569-2078
-----Original Message-----
From: HISTORICAL ARCHAEOLOGY [mailto:[log in to unmask]] On Behalf Of
D'Angelo, James (Atlanta,GA-US)
Sent: Thursday, February 19, 2009 8:04 AM
To: [log in to unmask]
Subject: Query
I am currently working on a master plan with a landscape architectural
firm for an archaeological park at the site of a late 18th early 19th c.
frontier fort in Georgia. The site has an interesting stockade wall
trench feature with collapsed firebox feature that was probably situated
within a corner blockhouse. Together these features probably represent
the SW corner of the fort. I would like to preserve these features for
visitors to see, but, of course, the features cannot be open to the
weather. The minimum surface area is about 6' x 12'. A photo of these
features can be seen at
http://archaeoseek.ning.com/profile/JamesDAngelo. Does anyone know of an
example of enclosing such features for public view short of constructing
a building over them? Help with this will be greatly appreciated...
James J. D'Angelo, RPA, Ph.D.
Archaeologist
TRC
4155 Shackleford Road Suite 225
Norcross, Georgia, 30093
770.270.1192 x125 phone
770.270.1392 fax
404.580.2079 cell
[log in to unmask]
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