Saturday, February 22, 2014

material choices

Material Choices:
100_4885.jpgBefore getting too far into the details of your frame design, it is worthwhile to take a trip to the nearest metal supply house.  I was fortunate in having full service nearby in Irvine, California.  The cost of metal is not going to be the most significant cost in your project.  The cost of welding, suspension components and wheels are much more significant.
Industrial Metal Supply
 
I found that metals were stocked and sold in specific sizes and lengths.  Many metal plates of varying thickness are stocked in precut sizes (4 x 4, 6 x 6, 10 x10, 12 x 12 inches, etc.).  Metal strapping also comes in prescribed widths (¾”, 1”, 1-½”, etc.).  Suffice it to say that designing elements that closely match the standard sizes stocked minimizes the amount of cutting necessary and saves a great deal of time.  By being judicious, I ended up with hardly any leftover scrap metal.
100_4947.jpgA walk through the supply house will also familiarize you with the “remnants bin” where you can pick up those small pieces of metal that my otherwise are only sold in 10 foot lengths.  Also take a look at the inexpensive abrasive cutoff wheels suitable for a hand held grinder.  I cut all of my frame elements using such a tool.  You’ll also find a small abrasive grinding disk useful for cleaning and beveling joints that are to be welded.
It was at the supply house that I came across the perforated steel sheets and the performed edging that I used for the outrigger frame platform.  This platform is not necessary but I liked the more finished look it provided to the end product.

Perforated Steel Sheet
 
When it came to connectors, I relied on my auto restoration expert, Ray Miller and selected only quality Grade 8 nuts and bolts.  These are somewhat more expensive but they are strong and corrosion resistant.  Again I was fortunate in having McFadden-Dale Industrial Hardware nearby in Santa Ana, California.  They seem to have every version of every bolt and connector ever made!

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