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thanks csd72..very helpful ---its for tension under bending ________________________________ Use RAPT for Slender RC Columns

I have a 250PFC hot rolled channel member that is cast into a large reinforced concrete (RC) wall . Thus a fixed member with a point load at the end. Does anyone know how to calculate the development length of the section into the rc wall? thanks in advance ________________________________ Use...

I used the same pile size for a 3 storey building and twice that size for a 10 storey building. Those piles adopted sounded too small in my view unless if they were spaced at every 48 inch! :) ________________________________ Use RAPT for Slender RC Columns

Just wondering if the Geotechnical investigation was engaged directly by the Client, Builder OR Structural Engineer? ________________________________ Use RAPT for Slender RC Columns

Aha! nice sketch, the 150thk slab sounds right to me based on that sketch. i also note that its a roof slab. Would there be a BBQ plate up there with some VB beer? I would be calling & rechecking for a 4kPa live load if it is. Just a thought. ________________________________ Use RAPT for...

she looks good! ________________________________ Use RAPT for Slender RC Columns

Location and size of the Openings in the shearwalls is the major issue here. Keep all openings within the centre of shearwall away from your compression zones. Do you use ETABS? Modelling these "parallel" zone as spandrells and detail as a coupled shearwall would be the answer. If you dont use...

I would say for this building height if regular, the issue of lateral drift is not a major issue.

canstructural, -Extend bottom bars in form of dowels say by 40xbar diameter min. - Ensure face is scabbled prior to next pour. - Cover might be an issue so dont ignore as it drastically reduces your effective depth. ______________________ Aussie brand RAPT is the best for slender rc columns!!

RLC32681, I strongly feel the 20m span beam would have a maximum positive moment & somwehat reduced moment at the column location as this is an end span & a very long end span! FYI I have used 150 thick slab for 7m x6.5m two way slab using AS3600 with compression reo for an office block which...

Ive modelled 3D buildings esp for seismic using ETABS. My comments are as follows and revolve around ETABS: - Understanding mass source, response spectrum functions, no. of modes, load case & combinations is an issue with 3D modelling esp for Seismic areas. - Detailing of moment connections...

Hi mate, I reccommend deleting the keyed joint if your tank is less than 4m tall. My experience is that the use of water proof membranes & admixtures allow ease of construction for small to medium water tanks & more economical. Builders normally dont like installing water stops as its quite...

sorry got disturbed by the graduate engineer :) Slab thickness & rebar please.

I am currently designing a 11 storey residential apartment building. I have a 2 way rc "end span" slab restrained on all 4 edges with 400x 600dp beams. Beams are spaced at grids of 7.8m & 8.1m. Data as follows: LL = 2 kPa SDL = 3.0 kPa (inclusive of 150 series NLB blockwalls) DL = Slab self...

AS3600 only deal with concrete strength of up to 65 mPa. Having said that its only a matter of months before the new AS3600 issue is out which i understand caters for up to 100 mPa concrete. Going back to footing reo,be careful with placement of tensile reo at correct face as footing with two...

fyi, deformed rebar costs around US$1300/tonne down here in Australia, the country without recession.

Could anyone please provide some help on how to differentiate the above two Structural systems for high seismic regions? My building is 11 storeys high, half of which sits into a hillside. I have weathered rock on all pad footings with allowable bearing pressure of 600-1000 kPa. I am having...

Hi there, Can anyone urgently point me in the right direction please. ive got an external wall of a building over 15.5 metres high which is made up of 4 basements. ie had supports at each basement level. Ive got a 70 degrees free standing undisturbed rock on backface of this wall and will...

I have to come up with a prelim design of a 250 meter long retaining wall. Before answering this question i would like everyone to know the wall is to be built in a developing country with a very low budget. Details as follows: - height of wall is 2.5m maximum - uphill slope = 0 degrees -...

Steve friction angle depends on the type of rockfills you use. - i have used 2.3tonnes/m3 in the past. Again this depends on your rockfill.