I recently saw a very, very strange thing: last winter, in one of the new
subdivisions that's helping to destroy our formerly-little town, I saw the
workmen assembling entire roofs--including dormers and shingles!--ON THE
The entire roofs for several houses were being assembled in the middle of
the (then unused) street on steel posts not more than 4' tall. Once
assembled, these roofs were somehow positioned on top of their receiving
houses. How they did this I do not know, as I did not get to see the
This must have been a test of some kind, since other roofs by the same
builder in the same subdivision were assembled using conventional methods.
It's done pretty often.
Sometimes they build them on the first floor decking since they can be
pretty sure that the decking is flat compared to the road.
Here's one thread where it's discussed and has pictures.
These were normal wood-framed.
Somebody said they use a crane to put the roofs on. I'm sure that's
correct, but I hadn't imagined a roof as large as these--with extensions
and dormers and stuff sticking out all over the place--would have
sufficient structural integrity to be picked up by a crane.
If I have to explain it, here goes......
You put in the foundation of the home. In each corner of the house
you put a 2x4 in one of the holes in the corner concrete block. The
2x4 must be the height of the finished house, so if the walls are
going to be 8 feet, use 9 foot 2x4s, (remember, the 2x4 is stuck on
the concrete block about a foot deep). If its a two story with high
ceilings, you'll need a 22 foot 2x4 in each corner. Build the roof on
top of those four 2x4s, and complete the entire roof with shingles and
rain gutters. This way the workers are protected from rain. When the
walls and floors are all built, those four 2x4s are removed.
An optional method is to build scaffolding to the finished height of
the walls, and build the roof on top of them. After the walls an
floors are completed, the scaffolding is removed. The problem with
this method is that there will be holes in the floors after
completion, because the floors have to be built around the
scaffolding. Therefore, the four 2x4 method is the preferred one.
And last but not least, get four hot air balloons with chains hanging
from each one. Space the balloons the size of the roof to be built,
then build the roof attached to those chains. However this may not be
the preferred method because you will have to be an expert at climbing
up and down those chains to go to and from work.
On 5/31/2011 4:55 PM, email@example.com wrote:
What? You've never used the anti-gravity construction units for holding
up structures? The first ones on the market were a little bit finicky
but the modern systems are automatic and virtually trouble free. You
have to encrypt the access control codes to keep kids from taking the
darn things for a joy ride but that's not hard to do with the newer DNA
scanner options. ^_^
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