Hi,
I want to make sure that I am understanding well AISC 360 chapter I-6.the code gives a 10% maximum limite for steel plate area.and refers to aCI for reinforcement maximum limit which is 4% in ACi.
My simple question is,can i use 10% as steel plates plus 4% steel reinforcement which leads to...
Im eurocode 2004 they permit ignoring openings in walls with area smaller than one tenth the total area of the wall in design and buckling checking.(12.6.5)
My question is:when we have many openings in the wall to be ignored.should each opening area be less than 10% the total area of the...
Hi,
I want to know if there are any rule of thumb that can be used to rough estimate lateral loads on piles or cross section dimensions of piles supporting/beneath a foundation of a tall building, based for example on the soil type and the axial load?
I want to determine size of piles without...
Can someone please answer the questions in the attached picture?
I am trying to understand how to use the rigidity factor equation, and I need to know how columns are taken into account in rigidity of mat and combined footing according to Bowles.
tried to search the web but in...
Hi,
as I understood from the following paragraph extracted from Bowles foundation analysis and design, that ks=12(SF)qa cannot be used to estimate differential settlements, but only can be used for design of foundation and soil pressure checking.am I right?
because an engineer I work with is...
Hi, I have a straight forward question:
In ACI 336.R88, they say the following:
"A flexible strip footing (either isolated or taken from
a mat) should be analyzed as a beam-on-elastic foundation. Thickness is normally established on the basis
of allowable wide beam or punching shear without...
Hi,
I am new to wind design and I need help, ASCE 27.4.6 says that we need to determine the center of mass of floor for wind forces calculation on flexible building.the equation that is used for eccentricity determination in such case include the difference between center of mass and center of...
Hi,
I am new to wind design and I need help, ASCE 27.4.6 says that we need to determine the center of mass of floor for wind forces calculation.
My question is , should I consider the center of mass the same one used for seismic loads ususally?(I mean the center of sustained+dead loads+0.25LL)...
Hi can Anyone please confirm me that there are no minimum cover to be applied on shear walls for fire protection?because ACI code seems not indicating such a requirement.it only talks about overall thickness.
Hi I need some explanation for how to check if a column is slender or not according to ACI.so I have these 3 questions.
1)if columns are not designed to resist lateral load..in other word considering the column connection with slab as hinged so that there is no moment transfer,could I consider...
HI,
I saw this thread: thread507-425089
In case I am following the method suggested by Collin, how should I take Vc? is it still 2sqr(f'c) as required by ACI?
hi.I want to design a slab that supports columns subject to snow load.table 9.5(b) of ACI give permissible limites for deflection.is snow load considered as live load or it is not included in deflection check?
Hi,designing a transfer slab I want to check deflection according to table 9.5(b).
I have snow loads transfered to the slab through implanted columns.it seems to me that ACI doesn't define snow load as a type of load to which we check deflection.so is it considered a live load?or it is neglected?
hello,
It is commonly used to multiply column reaction by a factor of:
1.2 for interior columns
1.3 for edge columns
1.4 for corner columns
Could this also be applied to punching shear force to check peripherical sections to avoid calculation of moments on the column(which otherwise are...
hi I am new in designing flat slab.
I want to calculate thickness for a flat plate with irregular column layout using table 9.5(c) of ACI.there are no edge beam nor drop panel.the problem is the definition of span length ln in aci is not very clear.can someone tell me how to measure span length...
Hi.I am new to safe.I have modeled a slab 30cm thick with 8x8m span as a test
Dead load 500kg/m2 live load 500k/m2.I am obtaining massive amount of steel.and if I average at peaks with width 0.3 to 1 meter it is giving 35cm2 at cornet.what might be the problem?
Hi.
In ASCE are the overstrength facrors that applies to horizontal component of seismic load are not required when using modal response spectrum anslysis?
hi.is the stifness of slab used to in vibration analysis is usualy the initial stiffness of the slab or the stifness after creep and shrinkage occurs?(long term stiffness)
