Straight truck flat bed

[Spruce addict]

I'm building a flat bed straight truck using a 1/25 scale white western star what  would be the proper width and length for flatbed.

Thank you 

 

[Ace-Garageguy]

I'm not a "truck guy" per se, but I've been around them kinda paying attention most of my life.

You should remember that a most truck bodies, flatbeads, vans, tankers, whatever, were built by aftermarket suppliers and not the factory that built the truck chassis and cab.

So there's really no "proper" length and width for a body, as they could vary from builder to builder.

HOWEVER...in general, any truck body will usually be wide enough to cover the wheel-tire set used, and extend an inch or more out to the sides, but not too much. The length will probably not be more than a couple of feet longer than the end of the chassis.

Do a Google image search for "vintage flatbead truck" for a good idea of what you need to be aware of.

[Force]

I believe the width is regulated and there is a maximum you can't exceed without a special permit and I think it's 102 inches.
Here you can read more: https://ops.fhwa.dot.gov/freight/publications/size_regs_final_rpt/

[Muncie]

Prior to 1982, the overall width limit in most states was 96 inches.  After 1982, the federal limit of 102  inches applies most places.   Overall length for straight trucks is regulated by the states - usually 40 feet but your state may vary.  There are grandfathered limits, permits and other exceptions.  Western Star built the cab-chassis for straight trucks and a truck body-builder installed the flatbed.

[Spruce addict]

Ace Force and Munice thank you for reply very helpful

[highway]

3 hours ago, Force said:

I believe the width is regulated and there is a maximum you can't exceed without a special permit and I think it's 102 inches.
Here you can read more: https://ops.fhwa.dot.gov/freight/publications/size_regs_final_rpt/

 

1 hour ago, Muncie said:

Prior to 1982, the overall width limit in most states was 96 inches.  After 1982, the federal limit of 102  inches applies most places.   Overall length for straight trucks is regulated by the states - usually 40 feet but your state may vary.  There are grandfathered limits, permits and other exceptions.  Western Star built the cab-chassis for straight trucks and a truck body-builder installed the flatbed.

While the width of 102 inches is correct for modern trucks, the 96 inch would be more correct for the truck I'm guessing the OP is using which would be the mid 70s White Western Star from AMT. It would all depend on the era and look being modeled, because a 70s era truck would have the 96 inch width, but one that was rebuilt after 1982 the wider 102 inch bed would be fine. 

As for the length, and guessing it is not a custom purpose built bed, the standard length of most add on beds is 24 feet.