Those are the best bridges, and they're an easy take down.
For Glue-Lam beam, supporting live load of 40 psf.
32' span ... spacing 8', requires 5" x 19" beam
Are you saying the 5" x 19" beams are 8 feet apart for a 32 foot span?
I have 3 triple 2x12s approx 28 inches between them.
Boy where were all these suggestions when I asked if there were any engineers hanging around?
This weekend I'll see how much deflection I get with 1000lbs on board.
Thanks for the input.
TJ--I'm having a time with a relatively simple (?) one. Level 10 on map pack 01.WIM, this is for you!!
Follow this link and download the bridge builder game. You'll see a link in the center of the page near the top. DL the 2006 version, i've confirmed it will run on Vista64bit so it should run anywhere.
Here is a direct link: Free download Bridge Building Game (2006)
It's lots of fun. Pay attention to the stresses, shown in red, when you "stress" the bridge. Then add additional supports and watch them redistribute the load. Test it when you think it's strong enough then run the train over it.
Brev - There are plenty of clues in the form of sample bridges on the original site I linked to. As far as it's applicability to actual bridge construction... i'm not going there. :turned:TJ--I'm having a time with a relatively simple (?) one. Level 10 on map pack 01.
Also, how realistic is this to actually building a bridge?
I'll have to check out the other link. That is a very cool game! I'm hooked. And I should have been more concise by asking about the relative stresses that are shown on the game. Physics elude me, educationally speaking, so I was wondering about the accuracy of the weight-induced stress and how each member reacts under it's own weight, how the weight transfers, etc...Brev - There are plenty of clues in the form of sample bridges on the original site I linked to. As far as it's applicability to actual bridge construction... i'm not going there. :turned:
Some of the physics are accurate, so there is something to be learned for most people who play with it.