ACI 318-8, clause 13.7.6 gives requirement for arrangement of live load on 2-way slab:
1) Pattern loading is not necessary if unfactored live load is less than ¾ of the unfactored dead load.
2) 75% of the full factored live load on appropriate panels is required if pattern loading has to be...
Ev=0 is required for those load combinations containing Eh-Ev when checking “soil-structure interface of foundations”. I am not sure about this terminology at all. Does soil-structure interface demand cover all checks such as ground bearing, overturning and sliding?
My second question is: why...
Clause 2.1.2.3 ACI530-05: allowable stresses increase by 1/3 for masonry
Three load combination C) D) and E) are allowed for this strength increase, besides those “permitted by the legally adopted building code”:
1. D+L+(W or E)
2. D+W
3. 0.9D+E
My load combination has an extra ingredient...
“ACI 318: 13.4.2.1 – Openings of any size shall be permitted in the area common to intersecting middle strips, provided total amount of reinforcement required for the panel without the opening is maintained.”
I totally agree with the first part of the sentence. My interpretation about the...
Apart from the settlement and overturning requirements (12.13.3 and 12.13.4 of ASCE7-5) for footings as parts of structures assigned to seismic design category B, are their other requirements for concrete isolated or combined footings in terms of strength and detailing?
Thanks
I am conducting a reference design of masonry infill panels inside a concrete frame which has been designed to seismic design category B. Masonry infill panels must be detailed in such a way that it will not perform as a shear wall under ground seismic movement. This might be achieved by...
I am currently designing a ground bearing slab as ring roads of an arena. Based on a rule of thumb, 250mm deep concrete slab resting on 150mm deep graded sub-base aggregate will be capable of withstanding a live load up to 15kPa (315lbf/ft2) and a maximum axle load up to 8.5 tonnes in the UK...
I recently started to use ACI318 to design two-way slabs (with and without beams). I got two questions and I will be grateful if I can obtain some help.
1) Calculate the total static moments in the long and short directions (clause 13.6.2.2). This will give a smaller value in short direction...
Are there any work examples of pad footing design to resist biaxial bending based on ACI 318? I only found some simple examples from a number of textbooks.
I wish to thank you all in advance!
We are designing a concrete building to SDC C (IBC 2003). From Table R21.1.1 of ACI 318, an intermediate moment frame system is expected. This allows the use of two-way slabs without beams in Cl 21.3.6. My question is: will it be acceptable to use concrete shear walls as the only...
