Mechanical Design, Manufacturing and Engineering Forum [ Home ] [ Search ] [ Design Resources ] [ Resume/Job Database ] [ Product and Services Directory ] [ POSTING POLICY / RULES ] [ Archive#1] [ Archive#2 ] [ Archive#3 ] [ Calculators ] [ ] Forum Moderators: randykimball, Administrator
 Posted by: smd79 ® 11/17/2004, 15:52:47 Author Profile Mail author Edit Hello,I have a question regarding the calculation of the max deflection for a simply supported beam (pinned at both ends). Actually I am confused on the moment of inertia used in this calculation.When determining the moment of inertia about an axis means rotion about that axis? ie Ix means the beam spins around at the x-axisIn that case is the moment of inertia that I use that which acts in the same direction as the force? I am using an 'I' beam in my calculations. All input is greatly appreciated,Thanks.Shawn

 Post Reply | Recommend | Alert Rate View All | Next |

 Replies to this message

 Re: beam statics Re: beam statics -- smd79 Post Reply Top of thread Forum
 Posted by: Cragyon ® 11/17/2004, 17:26:20 Author Profile Mail author Edit Check out the following links: /standard_material/Steel_ibeam_properties.htm or /standard_material/Steel_ibeam_s_properties.htm for an I-Beam, W or S Flange, you would use the moment of Inertia Ixx if the load and supports are applied on the top or bottom of the section shown within the drawing graphics.  Use Iyy if the load and support is applied on the left or right side of the drawing graphics.  The distance "c" is normally from the center of the shape to the outside along the direction the load or support is located.   Hope this helps!