How to add Fixed Geometry to Beam in SOLIDWORKS SIMULATION?

I'am disigning trailer frame for my batchelors degree. I am a bit confused because I can't add fixtures on specific point at that beam. Solidworks allows add only Joints. How to add fixed geometry to beam in specific point or area??
Sorry for my bad English. :)
4 Answer

hey nice question..
i have made my own vedio to clear your doubt.. u can refer this for this and further projects :)
thankyou . -Ayush Gupta
check here => https://drive.google.com/open?id=0BwccMXVx0jv2SWtMaHZadEJXLVE