Re: [Chrysler300] Subject: Shop Loft

["Warren Anderson" <wranderson@xxxxxxxxxxxxx>]

Hi Group,

This was previously sent out on another mail list and I got one good answer
back, however I would like to hear any other opinions before I commit to a
final design.  Can anyone offer any educated advice for this project?

>I was just given a lot of steel angle iron. I am thinking of building a
>9'x 25' loft in my shop to store all the good junk...I mean stuff, that
>one needs but won't be using for a while.
>
>I am planning to use 4" x 4" angle irons 1/4" thick and 8' long as the
>support columns. They will have plates welded on the bottom and be
>bolted/anchored to the concrete floor and will be placed under the
>perimeter angle iron. Will be either welded or bolted to the 3" x 3" x
>1/4"angle perimeter.
>
>I have 3" x 3" x 1/4" angle iron that will act as the perimeter, tieing
>everything together and also act as an end bed for 2" x 12" x 9' planking.
>The loft will be attached to two walls, but will be basically free
>standing and will have welded 3" angle diagonal bracing to provide
stability.
>
>Have not decided on the need for any support or columns in the center, I
>would like to maximize the space under the deck for an air
>conditioned/dehumidified work space.


Angle shapes are used as compression members but in your application would
not be advisable. An 8' piece of 3" std wt pipe will, as a better
compression/column element, be capable of simply supporting  something north
of 30,000 lbs. Square tubing may or may not offer some benefits construction
wise and a 3" sq tube 8' long and a wall thickness of 3/16" will also
support 30K lbs and upwards.

The 3'' angles you mentioned used as perimeter members will offer the
challenge of controlling the span to keep deflection to a decent level and I
think you mentioned controlling twist with a lot of bolts which could be
major construction effort but something of the kind will definately be
necessary. Would need more information before an allowable span for the 3''
angles and the flooring could be calculated but I my opinion is that both
dimensions will need to be broken up with supports so that something other
than air can be stored on the deck :o).

HTH (hope this helps)

Warren Anderson
Sedona,AZ





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