![aisc 14th edition table 14.2 aisc 14th edition table 14.2](http://www.hawaii-marine.com/templates/MathCAD/tee/sample.jpg)
Or Mn/Omega to insure it is equal to or greater than Mu.Ĥ. Than Lp then the proper beam will need to be selected using the "Available Strength Mn, however if the design will have the beam braced at intervals greater Selected would require bracing less than or equal to Lp to achieve the required Check the unbraced length factors, Lp and Lr. Unbraced Length" chart by the method below.ĥ.
![aisc 14th edition table 14.2 aisc 14th edition table 14.2](https://res.cloudinary.com/engineering-com/image/upload/v1550108737/tips/image_d5e9cq.png)
The shear strength of theīeam given in the chart, phiVn for LRFD or Vn/Omega for ASD, must equal or exceed Check the shear strength of the selected beam. Or the alternate method for simple-span beams and I-shaped members and channels The design shear strength, Vu calculated in step 1 above.Ħ. To calculate beam deflection can be used.
![aisc 14th edition table 14.2 aisc 14th edition table 14.2](https://res.cloudinary.com/engineering-com/image/upload/v1572384902/tips/Capture_cqd3df.jpg)
If the loading on the beam is a uniform load, the W-section can be selected from W-Section Beam Selection by Uniform Load: *For steel structural members, the dead load shall be taken as zero. Uniform loads are tabulatedįor each W- section for different span lengths in one foot intervals. The uniform loading on the beam is for a beam with an unbraced length, Lb less than Or equal to the unbraced length limit factor Lp. From the combination loading on the beam, either factored W-Section Beam Selection by Available Momentġ. Loading for LRFD or the unfactored loading for ASD the required design moment, MuĪnd the design shear, Vu are calculated. Should also include the beam's own weight as part of the dead load.Ģ. Enter the tables for "W-shapes - Plots of Available Moment vs. Length", and find the required design moment on the vertical axis, Mn/Omegaįor ASD or phiMn for LRFD. Plot the intersection point of the required design moment with the unbraced Next find the unbraced length on the horizontalĪxis. Choose a beam directly above and to the right of the point of intersection. The closest solid line will be the most economical beam. "Selection by Zx" tables and check the required shear strength, Vu versus Find the selected beam in the "Maximum Uniform Load" tables or the It means there is a more economical beam.ģ. The beams shear strength, phiVn for LRFD or Vn/Omega for ASD.Ĥ. Check the deflection of the beam and if it meets the serviceability and deflection requirements. Refer to the IBC deflection limits table above for common deflection limits. An existing beamĬan be analyzed quite easily with the "Section Properties" and "Maximum The steps below are for the analysis of an existing beam. Properties of the beam can be analyzed by calculation using the "Specificationsįor Structural Steel Buildings" which is part of the AISC Steel Construction Uniform Load" tables in the AISC Steel Construction Manual. Manual, and which contains the calculations upon which all of the various beam tablesĪre based and the properties and strengths were calculated.