FWIW: Uniform load carrying capacity of various solid steel angles.
Because of no specific professionally engineered designs offered thus far for all Model A body styles, "if" one wants to try to design and install Model A seat belt anchorage, (and many already have), this very limited bit of information may or may not be of assistance.
A. Many post were written about attaching seat belts "only" to the body and "not" the chassis ..... just in case the passengers were cut in half by the seat belts ....... "if" the body left the chassis. Each to his own personal guesses, existing Model A conditions, and new designs.
B. And, other posts further described attaching seat belts "only" to the body by attaching seat belts to the thin sheet metal floor pans with steel backing bars or washers. Again, each to his own Model A's whatever.
C. And some post described securing seat belts to solid steel that was securely bolted to the chassis. Again, each to his own preferences for providing safety features.
D. For trying to guess "if", "where", and maybe "how" one wants to, (or even doesn't want to), consider securing seat belts to the chassis, one may want to further investigate steel load tables where for one (1) example:
1. If one provides a continuous, solid, minimum 2" x 2" x 3/16" transverse steel angle spanning the in-side approximately four (4) feet distance between both in-sides of Model A steel chassis channels; and,
2. If this solid steel channel is provided and securely bolted to the 'underside" of the top horizontal flanges of these two (2) chassis channels, (i.e., with angle provided and extending therein between to approximately 4' - 4" long); and,
3. If this single angle is securely bolted to both the chassis and securely bolted to substantial metal on the Model A body along this four (4) feet span length, the "additional" uniform load carrying capacity of this angle provided to secure the body to the chassis, (in addition to the existing body bolts), is approximately 3,788 pounds.
4. Additionally, one may want to factor in car weights where:
a. The heaviest Model A car "body", i.e., the four (4) door Town Sedan weighs approximately 810 pounds .... station wagon, approximately 950 pounds.
b. The heaviest Model A car with engine, chassis, and body weighs approximately 2,475 pounds ...... taxi, approximately 2,500 pounds.
c. Passenger weights ....... wouldn't touch that with a ten foot pole ...... especially for a mother-in-law who eats too much ice cream.
d. Then, for example, on heavier 810 pound four (4) door Model A bodies, (rather than for example lighter 465 pound roadster bodies), two (2) steel angles can be provided on for example Town Sedans, (for both front and back seats), with a double load carrying capacity of 2 x 3,788 pounds = 7,576 pounds.
In knowing that no Model A G design forces are considered herein, nor rolling off of a mile high swinging bridge with one's mother-in-law with a gallon of ice cream, just hope this helps someone to decide what is best for "their" Model A and "their" mother-in-law.
