Originally Posted by Peter M
For a beam supported at both ends, fixed end means that it cannot rotate at the ends. In practice this is vey difficult to properly achieve. Free end (or simply supported, or pinned) means a support that resists vertical load but not rotation. You should use this one.
Your final span is very important for these calcs as for a point load deflection is proportional to span^3 and for a uniform load deflection is proportional to span ^4. I think you mentioned 10'6" above, which for the uniform weight of the stone would reduce deflection by 40% from my 12' calcs above.
Yes I'm set on 10' 6" now and I have changed the title to reflect this.
I was tossing around the idea of using a 'S' iron bracket, welding the 2 bars to it and attaching that to the frame. Does this qualify as fixed end?
If that is a not a good idea I can also attach the bars directly to the framing and double up the top support of the frame.
Still didnt make it to the yard yesterday as planned and its not happening this weekend either. Oh well.
For reference I attached a photo to show what I was thnking for the welds.
Also atatched is a photo of the bar mine is modeled after, except I am using full wood framing.
Also for the front most support(as viewed in photo), I could attach to the vertical framing to assist with load dispersion.
tony, I took a look at your thread. In my kitchen the installers used that approach for a 6" overhang 30mm granite. I have seen that approach used a lot but not for a big overhang as yours. In my search I also saw the unistrut approach(photo attached), but I could not easily locate a dealer in my area + steel is easier for me.