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Refer to following threads, for a good discussion regarding mass source: 1. http://www.sepakistan.com/topic/1552-defining-mass-sources/?hl=%2Bmass+%2Bsource 2. http://www.sepakistan.com/topic/191-use-of-mass-source-command-in-etabs/ 3. http://www.sepakistan.com/topic/83-live-load-reduction/?hl=%2Bmass+%2Bsource#entry725 4. http://www.sepakistan.com/topic/1310-checking-analysis-result/?hl=%2Bmass+%2Bsource#entry2458 HTH Regards.

IMO, the only legal way to use your PEC number is to get employment by a firm and physically work for it, so that you could get the works executed as per standard engineering practice. According to my understanding, 'Selling your PEC number to a firm' means to indicate that you physically work for a firm, BUT ACTUALLY YOU DO NOT, and get paid for it. This action has following implications. Firstly, it is constitutes a lie that you work for the firm (whereas you actually do not). Secondly, by doing so, you indirectly certify (or the firm wrongly poses) that you are supervising the engineering works executed by the firm (although your are not) as required by PEC, and thus you are responsible for all wrong doings and defects in engineering works executed, for which your PEC number is being used. And, none of the above , is legal. Regards.

The effect of torsion in beams, for reinforced concrete structures, can be neglected in most cases. Study the concepts of equilibrium and compatibility torsion.

u need to study about mesh convergence from any FEA book! it's an art! for usual geometries and normal problems, default values of 1.0 in etabs or safe are okay! but mesh should not affect reactions. it affects strains, displacements, stresses but the reactions in columns which are 1d elements should not be affected. i mean the equilibrium is satisfied!

Apart from what Uzair has suggested, I would also recommend you the software for metal deck design. It is COMDEK by Tata Steel. Update: I think they have changed it to "ComFlor" and the link is here http://www.tatasteelconstruction.com/en/about-us/building-envelope-and-structural-decking/technical-information/comflor/software

Rasheed, If the only problem you are asking about is how to anchor the dowels, you may contact Hilti (as you have already been correctly advised by others) for necessary advice as well as execution of job. It is not a new technique, and is being commonly used all over the world, in connection with strengthening and retrofit of concrete structures. There is no harm in using it, provided it is designed and executed by a specialist firm (like the one mentioned above). You should however be careful that by relocation of column, column footing will become a bit eccentric, and may require rechecking to see it remains sufficient for the new situation or not. However, if you need a bit detailed advice, you will have to share some more details regarding your structure and extent of problem, e.g., - What type of structure it is? All RCC or partially concrete and partially structural steel? in what proportions? -Total number of storeys, - upto which level work has completed? - what is the actual bay spacing in both direction? - how many columns are causing problem? - What other options you are thinking of? Regards