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anyone having experience of designg cat walk in etabs????

thanks alot sir u solved my problem i was confused with it. took help from internet but it confused me more so i posted it here thnks for it

change your units to lb-ft as you know concrete density is 150 pounds per cubic feet = 150 pcf now w=mg according to physics...and g = 32.2 ft/s² so your mass will be = 150/32.2 = 4.658 lb remember to check your units....if in your case it is kip-in then weight = 150 lb/ft³ / 12³ / 1000 = 8.68E-5 kips/in³ (not just 8.68 as you mentioned in your question) similary mass = weight / gravity = 8.68e-5 / 386.4 = 2.246E-9 (because 32.2 ft/s² = 32.2x12 = 386.4 in/² as your units are kip-in) weight and and mass are not affected by compressive strength....

you are right to put the same thickness in membrane and in bending. the thickness you put in membrane will give self weight and the bending will give you the bending simple. If you are using precast panels you can put different thickness in membrane and bending. You can put only the top screed thickness in membrane and slab thickness in bending. Shell: transfers loads to nodes of that shell element. Like in flat slabs. Loads will go directly to columns. You cannot design beams on shell unless you have meshed it finely. In plane as well as out of plane stiffness Membrane: transfers loads to beams. It has only inplane forces Thick plate is used where shear deformations are important but the mesh is simple. Thick plate is generally used when span over thickness is less than 15 for example if slab is 600mm and span is 6m then ratio is 6/0.6 = 10. You can use thick plate option. It has only out of plane stiffness All this is given in manual helps of CSI softwares.

I was wondering about the people and activities of SEFP. Have a look at the following stats (date: 22.aug.2012). This is my agenda for next 3 months for SEFP. Please lets start to define some roles and targets for SEFP. You can disagree and put it down but vote for me how many of you agree with me! I wanna see the stats and numbers. Afterall this is just a suggestion. Total members: 816 This number is decent. At this point i care about participation & quality instead of just a crowd doing nothing out there. Total posts: 918 [ 66% of all the posts are by top 5 members ] Post count by top 2% members should not go above 70%. 1) Atleast 30% contribution to SEFP should be from 98% members to get a feeling the SEFP is not just run by the moderating team. Average post rate: 1.125 post per member Should reach upto 1.3 2) Ensures improved density of posts over the total population of SEFP The most liked content is by: 6 users Believe it or not. Its a measure of active members of the forum. Need to make it to 8 (not just 1 post...rather many posts by more than 8 people liking) 3) To develop the habit and to encourage people to appreciate others work and say Thanks to him/her. Users with more than 10 posts: only 16 Here i use my own self devised rule that the %age of members posting more than 1% of the total posts (9.18) should be more than 2%. In our case it is 1.96%. Lets make it 2% 4) To ensure that there is always performance. If the no of members increases so should the post count. Among the moderating team of: 11 members (if we exclude admin) the ratio is 1 moderator for every 81.6 members and 91.8 postss In my opinion these ratios should be touching 200. 5) To avoid having more controllers than needed over limited no of posts and threads and members. Moderating team acitivty: 2 members didnt even visit the site since last 1 month and the other 2 since last 2 months (pathetic) 6) Check and balance on the performance of moderators. Setting a time limit after which the moderator will lose the right to be a moderator. Voting for moderators should be done after some time in SEFP. Male/Female participation is: 99% : 1% . Additionally all that 1% posts from females is only from 1 member out of 8.. 7) Not an important issue as this is STRUCTURAL engineering not the ARCHITECTURE or INTERIOR DESIGNING but still a surprising fact. I wish if we can make it 2%???? 93% of total members have made NO POST at all! Zero Post .....0.0...93% Inactive users.....Lets put a min limit for a member to stay a member for SEFP. If a new member doesnt post, say 5 times in 2 weeks...assume...the member should be deleted automatically! 8) It will ensure more activity and realistic ratios for SEFP activities based on active members not just on inactive members. We will have nice people instead of bunch of useless spammers and trial downloaders. The list can go on! like the percentage of different threads etc but for the time being we need more members and more posts. Lets get the results asap. I think we should do it in a more organized way. Giving moderators their responsibility to do something for forum and to set targets monthly or every other month lets say! and to achieve them. I would highly recommend the ADMIN to take this suggestion seriously!