Starting my bridge!!

   / Starting my bridge!! #21  
Looking Good.JPG
 
   / Starting my bridge!!
  • Thread Starter
#22  
Thank you sir!!

Cut and notched 4 of the 6 cross tubes last night.

Cross tubes are on 2.5’ centers

Laid those 4 out this morning…..looking like a bridge!!

Gonna cut and notch the last 2 now.
Waiting till after 8 to fire up the welderD05FCD4E-EB7C-4DBB-9CB3-A1BE36252500.jpeg
 
   / Starting my bridge!! #23  
Did you put gravel or something to keep moisture off the wood supports?
The bridge is going up pretty fast, looks good, thanks for taking us on the ride.
 
   / Starting my bridge!! #24  
Doing a great job! Fast too!
 
   / Starting my bridge!!
  • Thread Starter
#26  
Welding is done!!!

Gonna set a string line on one side.
Throw some boards across and park both ATVs right in the middle and measure deflection……stay tuned 4600D044-DD48-49E3-BC0A-4B3BEE35D950.jpeg
 
   / Starting my bridge!!
  • Thread Starter
#27  
Results……

Started with a bit of a crown….approx 1/8”

I’d say there’s an 1/8” between the string and the 2x4. 1/4” sag.

I have some 3/8 crane cable….I may make a “u” under each stringer and use a turnbuckle to “arch” the bridge
9623B83E-A033-455C-9EF4-E93E085CF98E.jpegE62B70B6-DE7B-4139-B3F7-FF3F0673A8A8.jpegE62B70B6-DE7B-4139-B3F7-FF3F0673A8A8.jpeg4DE49136-0EFD-4037-8944-D9C4D3D9950F.jpeg31293732-78B8-4B2E-9445-139DCCA6B972.jpeg
 
   / Starting my bridge!! #28  
The traditional metal bridge construction method was to use a truss design. From what I read, much of the strength in a utility trailer has to do with the sidewalls acting like truss members and even there, a single solid rod added as a reinforcing member to the top of the sidewall construction can add to the carrying strength. Also, having some sort of sidewall members on a bridge would seem to add to the safety factor.
 
   / Starting my bridge!!
  • Thread Starter
#30  
The traditional metal bridge construction method was to use a truss design. From what I read, much of the strength in a utility trailer has to do with the sidewalls acting like truss members and even there, a single solid rod added as a reinforcing member to the top of the sidewall construction can add to the carrying strength. Also, having some sort of sidewall members on a bridge would seem to add to the safety factor.
I plan on a railing/guardrail of some kind.
 

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