EFFECTIVE 14 Nov. 2012 PRIVATE MESSAGING HAS BEEN RE-ENABLED. IF YOU RECEIVE A SUSPICIOUS DO NOT CLICK ON ANY LINKS AND PLEASE REPORT TO THE ADMINISTRATOR FOR FURTHER INVESTIGATION.
This is the Frank Lloyd Wright Building Conservancy's Message Board. Wright enthusiasts can post questions and comments, and other people visiting the site can respond.
You agree not to post any abusive, obscene, vulgar, slanderous, hateful, threatening, *-oriented or any other material that may violate any applicable laws. Doing so may lead to you being immediately and permanently banned (and your service provider being informed). The IP address of all posts is recorded to aid in enforcing these conditions. You agree that the webmaster, administrator and moderators of this forum have the right to remove, edit, move or close any topic at any time they see fit.
Question about roof framing if you don't mind. First, the perimeter header at the termination of the eave overhang on the NW side (the NW perimeter header) ... that is supported only at two points, by the two plate flitch beams that run EW (vertical to the page), right? Is this perimeter header built up from staggered pieces and bolted together or something like that?
Second, the eave overhang on the north side, the roof framing members run NS and frame back to one of those plate flitch beams and are cantilevered over and supported by the framed glass wall underneath. If that is correct does it mean then that there are four NS roof framing members supported directly by the column/mullions below and that these four NC framing members reach out to support the perimeter EW header?
Also, do you think the perforated plywood panels at the top had any structural purpose? This was suggested during our visit but, although perfectly suited to the overall design, I wonder if they needed for strengthening the assembly.
http://www.amazon.com/Frank-Lloyd-Wrigh ... ohn+eifler
The book provides a nice summary of the cottage's history and a detailed description of the renovation process. It also contains several photos and illustrations. It is one of the best books about a Usonian design on the market and is very reasonably priced. I highly recommend it.
The Lovness version of Peterson seems a bit larger and taller. dtc, outside in, and others who have experienced both designs, is this accurate? It seems that the Lovness version would have to taller, especially the utility area, to support a stand-up loft.
I wish I could answer the framing questions, but I'm not quite sure what is being asked! I should point out that the steel beam that frames into the chimney (where the sloped roof and flat roof meet) extends beyond the exterior wall and is used to support the cantilevered roof over the terrace.
The framing also shows a pocket that we created for the installation of insulating curtains that would be dropped at night to help conserve heat in the winter. Unfortunately they were never installed.
Would the storage area above the bathroom in the Peterson cottage have been able to support a small loft like the one that is in the Lovness version of the cottage?
How 'bout this: the roof joists that cross over the main window wall are discontinuous at that point, that is the point where they cross over the window wall. That's how I read your sections. Is this correct?
1. We wanted "pockets" to install electronically controlled recessed roller shades that would drop in the evening for energy efficiency. Unfortunately they were not installed, but may someday.
2. I've often speculated that the perforated panels were designed to also perform as framing supports, i.e. plywood headers, that would provide intermediate support on the roof framing that spanned from the bottom of the slope to the continuous header at the fascia. Wright spanned the Jacobs House and a few others the same way, and we did the same at the sloped portions of the roof. However, due to our desire to install recessed shades we doubled up the rafters at the bearing points and headed off the others.
Thanks for posting all of this wonderful information on Seth Peterson - a fantastic design w/ a great rehab done by you and your firm.
I have a general engineering question: when you have one end of a beam the is let into a masonry structure (in this case, the chimney), how are you attaching the flanges of the beam to the brick or block to assure a solid, unmoving connection is being made for (hopefully) all time?