Builders, God Bless'em, no matter the budget and size of any of our buildings, always complain about the hollow-core (HC) eight foot doors. We have built thousands of these HC doors in excess of 14'-6" and they have not fallen on people's heads, ripped apart, flown off the jambs or caused civil unrest at the Country Club. They work, but they are a little unusual for contemporary builders.
The reason we use these doors comes from an aesthetic
from the earliest roots of Modernism. As the great American architect Lou
Kahn said, "A door should not be a hole punched in the wall, but the
separation where the walls divide and one enters....". This is very
true and evident in The 1998 
Dream House; entrances to rooms and traffic
flow occurs between openings and separations between the walls which is
what makes the spaces so elegant.
Ok, so you have read all of this archi-talk and you still don't know where to find the doors. We have just completed a residence in Telluride Colorado and we had a pleasant experience with the company below.
Door Crafts
Distributed by
Western Door of Lumber Products
1840 South 700 West Street
Salt Lake City,Utah.
(801)972-9393 Phone (801)972-7920 Fax
© 1998 Hugh Newell Jacobsen, Architect F.A.I.A.
The logo and the
logo are trade marks of LIFE Magazine