Recent content by LGARG

Hi tdunaway i´m from argentina. If you need help just ask.The steel shapes and properties are the same as the european(IPn, IPE and so on) LG

hi to all, i agree with all of you. I think that in some case you should check if the diaphram could take the shear force at that point or the tension/compression developed when the diaphram deflects.But i insisit that is a good practice to provide a drag at every reentrant corner. LG

Could you add a plan or a sketch? it wouldd be really helpfull LG

Hi is a silly quick question about the ubc 97 and post tension slabs. Do we have to provide a minimum reinforcemnet for a PT slab designed only for crack control? I have a plan check correction asking for this and we ussually don´t provide any,just the tendons. As always thanks a lot LG

HI kano23, You should notice that the rho factor should be calculated for each direction and for each story so you might have diferents rho in each direction and in each story. Also the way of calculate de rmax depends on the structural system that you use .My last advice, if you are using the...

Archeng59 The Columns pass through the beam and are supported by a pad footing. The grade beam takes the moment of the column with a the couple generated by threaded rebars welded to the flanges of the steel columns and the compresion on the concrete.The footing takes all the axial load and...

rogelio, You could import a DXF file from autocad. you should draw the entire structure in any layer except the 0. Start the drawing form the 0,0,0 coordinate. i don´t remeber very well but i think that when you import the file, sap ask you in what direction the vertical axis is defined. I...

ARCHENG59: No, im talking about a grade beam a beam below of a moment frame that is used to resist the moments at the bottom of the columns. i would like to know what is the minimum reinforcement for this elements. By the way,We ussually design continuos footings as a grade beam and we specify...

Hi i Wanted to know about the minimum reinforcement on grade beams. we ussually use the minimum reinforcement for shrinkage and temperature. I wanted to know if this is ok or if we´re missing something. The amount of steel with this minimum reinforcement is huge compared with the requiered...

HI, swelm Could you please more specific? i don´t now what is your problem/question. try to be more specific in tour post so we could help you thanks LG

Alumpkin i´ve checked the Bowless Foundation Analysis and Design book and in chapter 9 you will find an example of a ring foundation for a circular water tank as a beam on elastic foundation. LG

alumpkin, so you dont have to calculate the walls of the silo? is a`premaufactured silo and you only have to design the foundation? is this alright?. I think that overturning could be critical when the silo is empty, and seismic when the silo is totally filled. Also i think that a mat...

hi alumpkin well i´ve designed two or three silos some time ago. i used the ACI code and a book of juan Ravennet that is in spanish. its quite simple but you have to take into account that depending on the height to width ratio(>2.5) the stresses in the walls or the base are different and you...

You calc the tributary areas per the dead load and live load for gravity columns, and if you have seismic you could take a lower value of stress or lets say1.6P/ 0.35f´c in ACI code for lateral resistant columns to take into account the seismic forces. This is like a fist approach. So when you...

hi nimaoy You should follow the ash060 suggestion. You have to calculate the Ag(total area).So if you want a square column the side B will be = (Ag)1/2. LG