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Civil Engineering/Questions Answered by Expert Babak Esmailzadeh Hakimi
| Subject | Date Asked |
| ETABS | 5/21/2012 |
| Q: Under the design menu there is "concrete frame design" what about the design of slabs. Is ETABS ... A: I give you a general view , please think about and then ask me further: We can distinguish 3 phases ... | |
| Tunnel Construction | 5/20/2012 |
| Q: http://en.wikipedia.org/wiki/Tunnel As we travel on road by vehicle and by trains we observe ... A: In road design, engineers consider several alternatives. These alternatives will be compared ... | |
| concrete | 5/17/2012 |
| Q: Can you add any different methods that can be used when pouring concrete in cold weather. Heating ... A: The temperature of hydratation of cement is a very valuable source of heat needed in cold area to ... | |
| Load Combination | 5/17/2012 |
| Q: I am a final year student and I am currently working on my thesis regarding Steel structure by ... A: 1- The load combinations you expressed are basic standard combinations according to EC8. I think it ... | |
| STEEL SECTION | 5/14/2012 |
| Q: When defining steel sections they denoted as W10x39 , HP10X42 . I think W is for I sections (use as ... A: Look for this file in your etabs folder :BSSHAPES.pro Then upload it in define section , add wide ... | |
| How to make a column element in ETABS model carry less reinforcement | 5/10/2012 |
| Q: QUESTION 1: For example a 2-sty concrete bldg. On site, the column had been cast with less ... A: A fixed moment resisting connection in column will reduce moment in upper part of the structure, it ... | |
| Beam/Column Capacity Ratio Exceeds Limit | 5/8/2012 |
| Q: In ETABS I've encountered the above message (beam/column capacity ratio exceeds limit), but it was ... A: 1- It is probable that the main action like axial forces and moment strength are ok but the shear ... | |
| Building Structure Load / Stress Testing Tools | 5/1/2012 |
| Q: What are the Different Load / Stress Testing Tools/Methods used by the Builder / Developer before ... A: There is no known single way to estimate the strength of a structure. All methods give you a ... | |
| Bridges | 4/30/2012 |
| Q: What is the name of the tall structure of a cable stayed bridge which supports the cables. Is it ... A: I recognize both "Pier" and "Tower" names for the structure supporting the cables, but "Tower" a ... | |
| Swimming Pool Construction on Building Terrace/Roofs | 4/30/2012 |
| Q: if we compute the total weight of the building which includes the belongings inside each house and ... A: I strongly recommend you to follow codes of practice to load your structure with standard loading. ... | |
| Concreting on rainy days. | 4/30/2012 |
| Q: I refer to practical difficulties of concreting in rainy days. When we concrete some element, say, ... A: I think it is better to use some cover, to guarantee the concreting being complete, if not you will ... | |
| pile design | 4/29/2012 |
| Q: in my site the hard layer(spt 50 blow/15cm) of soil is 42m below from the existing ground level.The ... A: 1 & 2 You must design the pile as a long column with no lateral support in such a soil or with ... | |
| Swimming Pool Construction on Building Terrace/Roofs | 4/26/2012 |
| Q: if we compute the total weight of the building which includes the belongings inside each house and ... A: There is no need to add individual weight generally because you cant be sure that these items will ... | |
| earthquake | 4/26/2012 |
| Q: 1) Your explanation is very clear but it is not clear--"Is it possible to design a structure ... A: 1- It is very common practice to design buildings in earthquake prone countries without base ... | |
| Swimming Pool Construction on Building Terrace/Roofs | 4/26/2012 |
| Q: if we compute the total weight of the building which includes the belongings inside each house and ... A: The actual code predefined loading either dead load or live load will be increased by a safety ... | |
| earthquake | 4/23/2012 |
| Q: 1) can you simply explain what is earthquake what sort of loads does it produced effect on ... A: 1- Conventional seismic design is based on sizing of structural elements according to a standard ... | |
| PTDF Msc scholarship courses | 4/20/2012 |
| Q: Good morning sir. I want you to help me with this issue. I graduated with a CGPA of 4.07/5.0 scale ... A: all those are very specialized, then you must follow your abilities and then you must follow your ... | |
| earthquake | 4/20/2012 |
| Q: 1) can you simply explain what is earthquake what sort of loads does it produced effect on ... A: Base Isolation is one of the methods you can use to protect the structure against seismic effect. ... | |
| removal of column | 4/20/2012 |
| Q: construction work of the all the columns and beams of attached image were already completed.(design ... A: You can follow one of the following method. 1-Reduction of Loading : you can remove some extra ... | |
| earthquake | 4/17/2012 |
| Q: 1) can you simply explain what is earthquake what sort of loads does it produced effect on ... A: Have you ever get on a bus ? Sure you have. Have you ever noticed that in every starting ( positive ... | |
| Splices of Steel Sections | 4/10/2012 |
| Q: I have a concern about my past project which will serve for the mass public assembly. The structure ... A: I want to introduce you a couple of idea: 1- Even though we know that the loads applied on the ... | |
| 2D Frame -to 3D FRAME | 4/10/2012 |
| Q: Sir, design of independent beam frame and entire model is showing different moments. Sir actually I ... A: A member inside a structure has connections with other members. These connections force the members ... | |
| pile foundation | 4/9/2012 |
| Q: one of the augur cast in situ pile( using bentonite slurry) was cast in the evening. It was observed ... A: 1 and 2- I think this is warning you about the nature of your soil and foundation. Be careful, about ... | |
| Building Construction Business Rules | 4/7/2012 |
| Q: We observe Different Buildings - Residential / Commercial Complexes with different number of ... A: The problem of construction is not only to decide about the number of stories to have more benefits. ... | |
| lapping of reinforcement | 4/7/2012 |
| Q: Good Day! Could u advise me where I could provide lap for a tie beam and a strap beam. I presume ... A: Lap splice can be provided everywhere but it is better to do it where minimum stress is expecting. ... | |
| School Building design | 4/6/2012 |
| Q: Sir, We are planing to build a school of 25,000 sq.ft building with ground floor plus two ... A: Expansion joint is for release and limiting of stresses due to temperature variations. As an ... | |
| concrete quantity | 4/6/2012 |
| Q: if i supposed to order the concrete RMC quantity for slab beam.the total cum i can calculate from ... A: You may have a set of drawings. If not you have to provide a set of sketch of your structure along ... | |
| strip foundation load calculation | 4/5/2012 |
| Q: can you tell me how to calculate the loading for a strip foundation if the overall loadings for a ... A: Loads on footings come from columns and walls. Then the loadings are not linear distributed exactly. ... | |
| ETABS | 4/5/2012 |
| Q: Is it possible to model piles(foundation) with super-structure using ETABS. IF POSSIBLE PL mention ... A: 1- I think the friction effect may have effect in this problem. You don't have a smooth surface of ... | |
| ETABS | 4/4/2012 |
| Q: Is it possible to model piles(foundation) with super-structure using ETABS. IF POSSIBLE PL mention ... A: Usually the soil will make a lateral support for the pile. But it is very dependent on the relative ... | |
| ETABS | 4/3/2012 |
| Q: Is it possible to model piles(foundation) with super-structure using ETABS. IF POSSIBLE PL mention ... A: You know that you can use etabs or sap to design everything but you must model it carefully. For the ... | |
| Swimming Pool Construction on Building Terrace/Roof | 4/1/2012 |
| Q: There are some queries from my side regarding Swimming Pool Construction on Building Terrace. 1. ... A: you should follow the following steps toward your target: 1-Look for as built drawings to check the ... | |
| design of a weir | 3/30/2012 |
| Q: A weir is to be constructed across a river to extract water from the upstream.proposed typical ... A: 1- I suggest you to design and construct a drainage beside the wall along the height of the wall ... | |
| Swimming Pool Construction on Building Terrace/Roof | 3/30/2012 |
| Q: There are some queries from my side regarding Swimming Pool Construction on Building Terrace. 1. ... A: 1- You can construct a pool on a building terrace. You have to take into account its weight ( weight ... | |
| concern about a gf slab | 3/27/2012 |
| Q: i built a building consist from 4 floors each floor 340m2,recently i cast the last slab (roof) its ... A: I am anxious about your roof slab. you mentioned that they have delivered a 200 kg /m3 for it. ... | |
| alignment of column | 3/26/2012 |
| Q: sir if the column's steel skeleton is in proper alignment but after pouring concrete cover become ... A: It depends on the extent of misalignment and the quality of it. The column should not be misaligned ... | |
| concern about a gf slab | 3/21/2012 |
| Q: i built a building consist from 4 floors each floor 340m2,recently i cast the last slab (roof) its ... A: I guess you have 400 and 350 kgf/cm2 as concrete strength. You must recalculate to find the ... | |
| Story forces, Diaphragm forces and story stiffness | 3/18/2012 |
| Q: I modeled a ten story building on ETABS with rigid diaphragm. When i see analysis results, the ... A: 1- Story lateral loads and diaphragm loads are the same. The diaphragm distributes story loadings ... | |
| Guide me | 3/18/2012 |
| Q: Sir, I am about to construct a building on a cornor plot.Its measurement is, 21 feet front and 125 ... A: Sorry for my late answer. You must have such an excavation to get to a foundation depth suitable ... | |
| Peripheral Beam Design in Flat Slabs | 3/18/2012 |
| Q: Respected Sir, I have used ETABS software to design flat slabs with peripheral beams. The columns ... A: Sorry for my late answer. Detailing is rather an art, then something to help you is not a single ... | |
| supports on beam | 3/13/2012 |
| Q: sir kindly give me practical examples of pin support or hinged support where such types of supports ... A: you have 3 types of simple support. 1- Industrial type pin connection which is applied ... | |
| dewatering | 3/13/2012 |
| Q: Good Day! For a B+G+1 villa ,according to the soil report its found that the water table is 4.00 ... A: I suggest you to use mat foundation. Pile cant be used before you know the depth and height of poor ... | |
| design of building | 3/13/2012 |
| Q: sir i am very keen to be structural engineer but yet could not get the proper opportunity.sir i ... A: Take a look on these links: http://www.civilprojectsonline.com ... | |
| dewatering | 3/12/2012 |
| Q: Good Day! For a B+G+1 villa ,according to the soil report its found that the water table is 4.00 ... A: It depends on you soil type and also wether you can dewater you soil or not. If you have gravel and ... | |
| ACI | 3/12/2012 |
| Q: Sir i would like to ask any book which clearly tells about all the ACI code. A: Please have a search on Internet , there is a lot of books you can go for them. In my opinion the ... | |
| information | 3/12/2012 |
| Q: sir i am w0rking in construction monitoring wing with client.but the problem is i am not ... A: QC (Quality Control) is a very extensive discipline in construction. I suggest you to follow 2 main ... | |
| improper alignment of colulmn | 3/11/2012 |
| Q: kindly tell me about any code which tells us about tolerance of alignment.I was told ACI 117 chapter ... A: Generally a tolerance of up to 5% is accepted all engineering activities. to be cautious i suggest ... | |
| ob opportunities for Diploma holders | 3/11/2012 |
| Q: What are Job opportunities for Diploma holders in Civil in India and other countries ? A: I guess there are opportunities in Persian Gulf countries and also in India but I cant give you ... | |
| improper alignment of colulmn | 3/11/2012 |
| Q: kindly tell me about any code which tells us about tolerance of alignment.I was told ACI 117 chapter ... A: Misalignment may produce unwanted moment in the column. 1 to 3 % is according to general engineering ... | |
| civil engg | 3/11/2012 |
| Q: ANSWER: Dear Abdul Yes you can retrofit a structure to make it earthquake resistant but it doesn't ... A: usually it is not possible to add columns but you can add shear walls in faces of buildings or ... | |
| civil engg | 3/10/2012 |
| Q: Dear sir can an existing building be made earthquake proof?if yes then how can we make it A: Yes you can retrofit a structure to make it earthquake resistant but it doesn't mean that it can be ... | |
| improper alignment of colulmn | 3/10/2012 |
| Q: kindly tell me about any code which tells us about tolerance of alignment.I was told ACI 117 chapter ... A: There is no significant tolerance acceptance by any code. Tolerances of construction usually are ... | |
| Architecture | 3/9/2012 |
| Q: What is the importance of structural mechanics in architecture A: Architecture is an art to create and imagine medias for the people to give them comfort, creativity, ... | |
| ETABS - Rigid Diaphragm Usage | 3/8/2012 |
| Q: I need to ask whether there is any case where i shouldn't apply a diaphragm to my ETABS model. I ... A: When I talk about diaphragm I mean horizontal diaphragm, ok? A rigid diaphragm have an effect of ... | |
| ETABS | 3/8/2012 |
| Q: This is further ehplanation with regard to a question that I asked about design section and analysis ... A: when analyzing the shear wall, a shear wall is nothing than set of area members. But their design ... | |
| raft foundations-etabs | 3/7/2012 |
| Q: 1)I found that reaction modulus for my raft foundation is 16000 kN/m3. is it correct to apply the ... A: 1- Right 2- It is easy by assigning higher stiffness or thickness in bands where you need. 3- Its ... | |
| Consultancy work from home. | 3/7/2012 |
| Q: I'm a civil engineer with a good background in RC structures design and quantity surveying, and have ... A: Salaam In my country there is no such an opportunity but I guess it might be possible in Persian ... | |
| ETABS | 3/6/2012 |
| Q: Sir, how to find the deflection of a particular point of a model created using ETABS ANSWER: Dear ... A: 1- Choose a perspective view and then do what you did before. With a right click on a node you can ... | |
| raft foundation | 3/5/2012 |
| Q: is there any method that we can analyse raft foundation using ETABS What is the computer based ... A: When the joint is fixed no deformation will occur there. In the case of spring the deformation is ... | |
| Anchor Rod Design | 3/5/2012 |
| Q: I am trying to design anchor bolts for some of my structures. I understand the concept but do not ... A: there are 3 ways to anchor a bolt: 1- use of bounding between bolt and concrete in cast in place ... | |
| Anchor Rod Design | 3/4/2012 |
| Q: I am trying to design anchor bolts for some of my structures. I understand the concept but do not ... A: Anchor bolt design must be done after you got the result of your structural analysis. Usually you ... | |
| civil engineering | 3/3/2012 |
| Q: As per sesmic code in india there are four zones. For zone III we consider zone factor as 0.16. what ... A: Usually the severity and intensity of seismic action is modelled numerically by coefficients which ... | |
| point load on slab | 3/1/2012 |
| Q: I have to design a slab(4346*6000mm) resting on a 250mm brick wall.At the center point of the slab a ... A: You don't have a theoric point load for sure. Then you must check the strength of the slab for ... | |
| Eccentric loading on pile cap. | 2/28/2012 |
| Q: Daer Sir. One of the piles in a 6 pile group was defective. The contractor a compensation/remedial ... A: It depends on the moment applied. The moment will apply greater axial loads on some piles and ... | |
| Necessary space to be left between two high rise towers | 2/27/2012 |
| Q: My question is about a real life situtation present in India. A group housing complex contains 15 ... A: The 15 meters distance between towers is a restriction oriented toward day light and wind around ... | |
| ETABS | 2/25/2012 |
| Q: There are structures which has concrete frame(columns and beams floor slab) and shear walls. Under ... A: Design of shear wall , deck and slab have their own discipline because a deck and slab are loaded ... | |
| Dynamic analysis | 2/25/2012 |
| Q: Sir Greetings! I am an M-Tech Scholar in Structural Engineering. Presently doing my Thesis work.My ... A: There are 2 kinds of modelling concerning the information in access and complexity of your system. ... | |
| Dynamic analysis | 2/24/2012 |
| Q: Sir Greetings! I am an M-Tech Scholar in Structural Engineering. Presently doing my Thesis work.My ... A: When you model an inverted pendulum, you first model it as a mathematical set of formula outgoing ... | |
| portal frame | 2/23/2012 |
| Q: while designing a steel portal frame of 28m span,6m bay & 15m clear height with a 15ton crane at 10m ... A: 1- design assuming fixed base will be more economical considering the frame but it needs more ... | |
| Dynamic analysis | 2/23/2012 |
| Q: Sir Greetings! I am an M-Tech Scholar in Structural Engineering. Presently doing my Thesis work.My ... A: Have you had a literature survey about this topic? If not I think this is the first step before you ... | |
| Cutting of RCC beam rebars thru anchor bolts pockets | 2/23/2012 |
| Q: heavy vertical pumps are to be installed on roof slab wherein beams around pumps openings have ... A: The only way to resolve this problem is to analysis your slab and beam with the actual loading on ... | |
| ETABS | 2/23/2012 |
| Q: There are structures which has concrete frame(columns and beams floor slab) and shear walls. Under ... A: 1 , 2 - Concrete frame design and shear wall design will be performed separately in 2 consecutive ... | |
| Reinforcement joint details between columns and beams. | 2/22/2012 |
| Q: Can you show me sketches about reinforcement of joining columns to beams, do I need to bent dwell ... A: Joint detail in seismic regions shall to be considered different as non seismic regions. I guess you ... | |
| RC DESIGN | 2/22/2012 |
| Q: There is a 2 storeyed building with roof slab. ground floor columns are on 7mx7m grid. Intermediate ... A: There is No technical limit to increase the reinforcement. In non seismic area it will be less ... | |
| RC DESIGN | 2/21/2012 |
| Q: There is a 2 storeyed building with roof slab. ground floor columns are on 7mx7m grid. Intermediate ... A: Sorry for my delay. Nice problem you are dealing with , I propose you to use same section in both ... | |
| undergroundwatertank desin | 2/20/2012 |
| Q: Good Day! This is regarding the underground watertank design of 2.2mx17.0m Is it enough if I design ... A: The thickness of your water tank depends concrete strength and also reinforcement class. The ... | |
| structural system of cantilever structures | 2/17/2012 |
| Q: could you please explain to me how the structural system on the cantilever structure showed in the ... A: Please look at the image I sent you and let me know wether it is satisfying or not. If you would ... | |
| frame-shear wall design | 2/17/2012 |
| Q: For column and beams skelet we model it as a frame.How do we model for shearwall-column structure? ... A: For hand calculation you don't need to model your shear wall with your frame. You will calculate the ... | |
| RC DESIGN | 2/17/2012 |
| Q: There is a 2 storeyed building with roof slab. ground floor columns are on 7mx7m grid. Intermediate ... A: 1- In high seismicity regions you need to have columns stronger than beams to insure collapse in ... | |
| ETABS | 2/14/2012 |
| Q: 1).When analysing structures there are critical loading arrangements to be considered (like all ... A: 1- this is not the only criteria but when a structure has long period (say more than 0.8 or so ) it ... | |
| about mix design | 2/14/2012 |
| Q: can you suggest me the best mix design of concrete with hysd steel bars reinforcement for getting ... A: Concrete admixture design is an art which should be performed using several parameters. 1- ... | |
| Civil Engineering thesis topic | 2/12/2012 |
| Q: Good afternoon Sir, I kindly need your help in regard to a thesis topic for my masters. I have a ... A: There is a lot of subject to pursue in this topic: 1- Probabilistic approach to construction ... | |
| Stresses on Reactor Components | 2/12/2012 |
| Q: What are the different types of stresses, that are possible in nuclear reactor components? How can ... A: No real difference between stress in a reactor and a simple structure. The difference exists between ... | |
| Concrete Methodology from height | 2/10/2012 |
| Q: What are the ways to pour concrete in columns where the column reinforcement is congested and also ... A: You must work on your concrete admixture to reach to a fine grained concrete. In addition you must ... | |
| ETABS | 2/9/2012 |
| Q: 1).When analysing structures there are critical loading arrangements to be considered (like all ... A: 1- Yes Etabs Analyses statically by default. Static analysis means that your loading is permanent ... | |
| Regarding construction management | 2/8/2012 |
| Q: I have done B.Tech in civil engg. and currently working in metro rail project in execution ... A: Project management is potentially a very rewarding career. It also has a lot and a lot to study ,to ... | |
| ETABS | 2/6/2012 |
| Q: 1).When analysing structures there are critical loading arrangements to be considered (like all ... A: 1- I don't know PROKON but etabs doesn't design searching critical loading. You must yourself use ... | |
| lateral load | 2/5/2012 |
| Q: 1st step : To model the structure completely and to load it totally according to codes of practice ... A: 1- It means that your frame has to be able to resist about 20% of earthquake loading alone without ... | |
| ETABS | 2/2/2012 |
| Q: First of all I thank you for clearing my confusions over lateral load distribution of a model.(in ... A: 1- Structural design is an art : to use loadings which are not known exactly, in a combination which ... | |
| about building engineering | 2/1/2012 |
| Q: sir,i wanna know something about the building engineering field...can you tell me that how much part ... A: Nuclear reactor is a small part of a nuclear power plant. Several buildings exists in a nuclear ... | |
| ETABS | 2/1/2012 |
| Q: First of all I thank you for clearing my confusions over lateral load distribution of a model.(in ... A: 1- The first method is based on an mixed analytical and experimental method, which takes into ... | |
| ETABS | 1/31/2012 |
| Q: First of all I thank you for clearing my confusions over lateral load distribution of a model.(in ... A: You are welcome. If you apply your wind loading like what happens actually and you arrange carefully ... | |
| strength of materials | 1/29/2012 |
| Q: sir, i want to know the concept of Strain Rosette A: Please take a look at this link: ... | |
| Reinforce concrete design | 1/28/2012 |
| Q: Sir, am finding difficult to carry out design work using architecural or building drawing due to ... A: It is hard to reply such a question , but generally you must be aware of some points: 1- The ... | |
| Finite element modelling | 1/28/2012 |
| Q: What is finite element modelling of a composite deep beam? What are the steps to adopt if one wants ... A: 1- What is a composite deep beam? you mean a mix of reinforced concrete slabs and steel profiles? ... | |
| lift core foundation | 1/28/2012 |
| Q: 1.I am designing pile cap for a lift core of a 8 storied building of 90 feet height.But I am in a ... A: I cant understand why you want a pile system for a lift core, because usually the loading of lifts ... | |
| test for steel | 1/27/2012 |
| Q: i want know about what kind of tests r applied to check steel strength n plz tell me the procedures. A: Hi, There is a wide range of testing each of test is specified for a purpose like: - Chemical Tests ... | |
| thesis methodology | 1/27/2012 |
| Q: sir, i am starting my thesis and i wanna know how to write a thesis methodology of a research ... A: According to my own experiences you can follow the below mentioned trajectory, but you can have your ... | |
| project help | 1/26/2012 |
| Q: Respected Sir, I am in my final sem of my civil engg'.I am interested in doing a project in ... A: It is hard to reply such a question , but generally you must be aware of some points: 1- The ... | |
| RC DESIGN | 1/26/2012 |
| Q: Is it possible to design 50'-00" x 50'-00" (15.24m x 15.24) RC SLAB without intermedite column. ... A: The main feature one has to consider in design of long span slabs and girders is the limitation of ... | |
| RC DESIGN | 1/25/2012 |
| Q: Is it possible to design 50'-00" x 50'-00" (15.24m x 15.24) RC SLAB without intermedite column. ... A: No restriction to have any span in RC slabs. That was an idea, you will have 2 main beams spanning ... | |
| RC DESIGN | 1/24/2012 |
| Q: Is it possible to design 50'-00" x 50'-00" (15.24m x 15.24) RC SLAB without intermedite column. ... A: Hi, nothing is impossible. Sure you can design a 15x15 slab and waffle has been used before ( it is ... | |
| Civil Engineering beams. | 1/21/2012 |
| Q: we built a buildings with cement bricks and iron sheets not concrete slabs. what i want,the size of ... A: With the type of building I see in your picture you can use 25x25 Reinforced Concrete Columns with 4 ... | |
| Pile top movement | 1/19/2012 |
| Q: What is the allowable rate of pile top movement so that load can be increased in static load test? ... A: hi, you will have to deal with an axial (tension) loading. You have to be careful when watching your ... | |
| structural design using ETABS | 1/19/2012 |
| Q: 1) A medium rise building having adequate shear walls in X & Y direction to be modelled using ... A: 1- For foundation design , considering moment and axial load is more conservative than axial load ... | |
| structural design using ETABS | 1/18/2012 |
| Q: 1) A medium rise building having adequate shear walls in X & Y direction to be modelled using ... A: 1- While you have at least 2 layers of reinforcement entering inside the foundation, you have a fix ... | |
| structural design using ETABS | 1/17/2012 |
| Q: 1) A medium rise building having adequate shear walls in X & Y direction to be modelled using ... A: This is what I prefer to follow: 1st step : To model the structure completely and to load it ... | |
| saw dust as sand in concrete | 1/16/2012 |
| Q: I am using sieved saw dust as sand replacement in concrete. i got 8N/mm^2 as 7 day strength for ... A: Concrete admixture is very serious even for moderate range of strength. Saw dust cant replace sand ... | |
| alignment of RCC columns - lapping | 1/16/2012 |
| Q: Sir, My house is in foundation stage. There are 12 RCC colums out of which 3 columns are ... A: Concrete admixture is very serious even for moderate range of strength. Pit sand cant replace sand ... | |
| Alignment and size of columns, footing size | 1/16/2012 |
| Q: In a Basement + Ground + 8 floors residential building (apartmenet) where I have booked a flat, I ... A: As you might guess , this is not a question I can give you prompt and explicit answer. Please take ... | |
| structural analysis using ETABS | 1/13/2012 |
| Q: What is the purpose of applying diaphragms to slabs . Why this facility is not available in SAP ... A: 1- In the case you dont use a solid diaphragm, loading on each node will be absorbed by the ... | |
| reinforced concrete column construction related | 1/12/2012 |
| Q: I live in Dhaka,Bangladesh in a RC frame building built 1991, 4 storied foundation, 2 story ... A: In the case your waiting reinforcement( for overlap) being lost , you will be obligated to use ... | |
| structural analysis using ETABS | 1/12/2012 |
| Q: What is the purpose of applying diaphragms to slabs . Why this facility is not available in SAP ... A: 1- Gravity center of your story will be regarded as your diaphragm center, because seimic loads ... | |
| structural analysis using ETABS | 1/10/2012 |
| Q: What is the purpose of applying diaphragms to slabs . Why this facility is not available in SAP A: The essential decision to be made when modelling a structure is wether the diphragm in each story ... | |
| Foundation design | 1/8/2012 |
| Q: 1.I want to design piled base foundation for machine which is fixed on the pile cap by 10 anchor ... A: Sorry for delay. You can follow these links http://www.ce-ref.com/pile_cap.htm ... | |
| project managment | 1/8/2012 |
| Q: I want to be a project head for any particular site so what would be better carrier option? ME in ... A: It is very much dependent on your talents and targets, but I think You can reach your goals through ... | |
| g=9.8 m/s^2 | 1/7/2012 |
| Q: Why the value of acceleration due to gravity,g=9.8m/s^2 ? A: This is an experimental value. But I admit that if we would be in another planet like Venus , or ... | |
| Shear Enhancement | 1/6/2012 |
| Q: can you please explain me about Shear Enhancement. actually this situation occurs at column is not ... A: Shear enhancement is not a very popular expression to explain about the critical shear stress in ... | |
| alignment of RCC columns - lapping | 1/3/2012 |
| Q: Sir, My house is in foundation stage. There are 12 RCC colums out of which 3 columns are ... A: Plinth Beams are not load bearing members in normal situations. They provide a basis to transfer ... | |
| End of the world. | 12/30/2011 |
| Q: December 21, 2012 is the date of end of earth ? A: You know what? Human is a model maker. Human is a resolver. Human models every thing in the world ... | |
| buiding construction | 12/29/2011 |
| Q: sir,i m a civil engineering student of 3rd year i want to know how to calucate the loads on the ... A: Loading on buildings is a very wide feature which must regarded through a systematic approach. For ... | |
| Characteristic strength concrete (fcu) | 12/28/2011 |
| Q: sir, am try to manual design a 30m simply supported pre-stressed concrete bridge, i need know what ... A: No serious limit exists for concrete strength, but you must have reliable source to provide you with ... | |
| alignment of RCC columns - lapping | 12/28/2011 |
| Q: Sir, My house is in foundation stage. There are 12 RCC colums out of which 3 columns are ... A: Intentional and unintentional misalignments of columns are very common in buildings due to ... | |
| Newton's 1st laws of motion | 12/28/2011 |
| Q: If a body is at rest it remains at rest or 'if it is in motion it moves with uniform velocity' until ... A: The Newton laws are conditional. IF the resultants of forces acting on a body remain strictly zero, ... | |
| 'Lime' is use as building material | 12/27/2011 |
| Q: Why 'Lime(Limestone)' is use as building material? It get heated very highly when it come in contact ... A: The broadly used term lime connotes calcium-containing inorganic materials, in which carbonates, ... | |
| baseplate area expansion | 12/27/2011 |
| Q: Good Day! I have one steel mezzanine structure resting on a ground floor slab thickness of 10cm ... A: I need to have your details along with your loading details , to better give my idea, but as a ... | |
| Cement cracks. | 12/25/2011 |
| Q: Why cement get cracks after some period ? A: As a general rule all cracks are due to strain and deformation, in cement and concrete creep due to ... | |
| Final Year Project | 12/24/2011 |
| Q: I'm a final year student and looking for a topic related to steel structures and earthquakes, which ... A: You have a lot of opportunities. You can look for in Internet. The main topics are: Earthquake ... | |
| Design of beam using SAFE | 12/15/2011 |
| Q: In the design of a flat slab for a building floors using SAFE, the design results for edge beams as ... A: It is preferred not to use safe as a beam design tool. You can use Etabs to design girders and ... | |
| Design of Earthquake building | 12/3/2011 |
| Q: Assalamualiakum Sir! Plz sir help me regarding a very major problem.. Sir am ... A: 1- I give you an example. Have you ever analyzed a number like 72 into its primer components? like ... | |
| Design of Earthquake building | 12/3/2011 |
| Q: Assalamualiakum Sir! Plz sir help me regarding a very major problem.. Sir am ... A: Salamon alaikom va rahmatollah va barakaato It is not satisfactory to use Equivalent Static Method ... | |
| Raft Foundation | 11/28/2011 |
| Q: I'm working on a thesis project "EFFECTIVENESS OF COMPRESSION REINFORCEMENT IN REINFORCED CONCRETE ... A: Salam Aleikom When you lay a mat or raft foundation on the soil , soft soil for example , you will ... | |
| foundation design | 11/26/2011 |
| Q: pleas assuming i have calculated for the require reinforcement on the x-axis say 4R16@200C/C AND ... A: You must arrange to put the most critical moment reinforcement ( say the longest side rods) in lower ... | |
| civil engineering | 11/26/2011 |
| Q: sir, with due respect, i want to ask you a question that i am now doing BS earth science from ... A: It is up to you , but generally a graduated geologist can follow his/her dreams either in soil ... | |
| footing | 11/25/2011 |
| Q: My question is regarding footing design. I have a footing with an eccentric plinth. How do i ... A: Please send me your problem so that i can suggest you a solution. In the case of uplift not balanced ... | |
| Base slab | 11/24/2011 |
| Q: Sir, I want to design a water tank ... A: Hello, in the case of cylindrical water tank, usually a ring basement under water tank shell will ... | |
| Structural RCC columns | 11/24/2011 |
| Q: Good evening, Usually in residential construction, columns are joggled after slab ... A: Any forced and persistent displacement leading the structure in plastic behavior area, must be ... | |
| Slab Design | 11/21/2011 |
| Q: i want to know if point load acting on the slab (weather one way or two way slab) how can design it? A: This is a problem of analysis of slabs under arbitrary loading. 1- First step is to using a ... | |
| Stiffness modifiers(modification factors)for etabs | 11/20/2011 |
| Q: Good Day! 1.how can I get the mofification factors that is to be used for structural members ... A: you must use several files to be able to compare the effect of stiffness modification. You cant make ... | |
| FOUNDATION DESIGN | 11/9/2011 |
| Q: pls i want u to give me the systematic process designing pad foundation A: I have designed a program to give you instructions about spread footings design. I start my program ... | |
| foundation design | 11/7/2011 |
| Q: please sir how do I know that punching and crack is checked after the design calculations A: You must do check the punching effect by assuming total vertical load submitted by column being ... | |
| pad foundation design | 11/7/2011 |
| Q: please I want to know the systematic process of calculating pad foundation design to get the number ... A: Take a look at the link : http://www.fortunecity.co.uk/campus/art/391/padfound.html I don't have ... | |
| RCC Beam | 11/4/2011 |
| Q: Sir, please find attached calc’s for Rcc beam. Top and bottom of beam connected with slab. How to ... A: You must notice a couple of matters: 1- Your loading combination must be defined as USD ( Ultimate ... | |
| Eccentric Footing-2 | 11/4/2011 |
| Q: Sir, Please find my attached calc's for design of Eccentric Footing. check about net up ward bearing ... A: I didn't mind to put tensile reinforcement. I meant when moment intensity (eccentricity) increases ... | |
| Need Help regarding steel type | 11/3/2011 |
| Q: Sir, I have a small unit of Heavy Automobile Fabrication. I make load carrying structure over ... A: All these conveniences together will be expensive in price for you. To be reasonable you can try to ... | |
| Eccentric Footing-2 | 11/2/2011 |
| Q: Sir, Please find my attached calc's for design of Eccentric Footing. check about net up ward bearing ... A: In addition something you have to be careful about is where your soil stress gets tensional. In such ... | |
| Eccentric Footing | 11/2/2011 |
| Q: Sir, Please find my attached calc's for design of Eccentric Footing. check about net up ward bearing ... A: Your calculations are correct. You can either increase the allowable stress of soil by strengthening ... | |
| foundation design | 10/31/2011 |
| Q: please am a civil engineer student at kumasi poly Ghana, and has given a task to design pad ... A: Salut You may know that the design processes which are in hand and we apply them to size our ... | |
| Shear checking at footings | 10/27/2011 |
| Q: Please explain me about shear check in footing Design. about one way shear is that really happen at ... A: The punching shear failure mode is more likely to happen in very soft soils. The wide beam shear ... | |
| foundation engineering | 10/26/2011 |
| Q: how to arrange the reinforcement for the rectangular footing? A: Your question is not so clear but for a preliminary help I can say: 1- The reinforcement ... | |
| Conduit in concrete | 10/26/2011 |
| Q: There are 16 conduites of 15 cm to be passed verically in abutment wall (2 m wide).I read ACI 318 ... A: Naturally never a code will allow to weaken the basis of theoretical assumptions. But you must ... | |
| Deisgn of Ramps in ETABS | 10/26/2011 |
| Q: i am trying to design a ramp and its supporting columns and beams(in ETABS) but when i get the ... A: Salam You must take care of your ramp not to be defined as rigid plate. Rigid diafragm will join ... | |
| Tensegrity structure | 10/25/2011 |
| Q: Salam, I am 2nd year architecture student, currently doing some explorations of good structure. I ... A: Salam Tensegrity is not a very new structural concept but may be a modern architectural approach. ... | |
| civil | 10/23/2011 |
| Q: Sir, what formula we use to measure 1-1/2" carpet laying in road. ANSWER: Dear Nadeem Your ... A: The general Formula of deriving weight from volume is a physic problem , you must know it. The ... | |
| cable-stayed bridge | 10/19/2011 |
| Q: Hakimi I am still an undergraduate student. I have some problems in understanding the reason of the ... A: Salam It is recommended in structural engineering to shift strength mechanism of structures from ... | |
| strengthening of column | 10/19/2011 |
| Q: Good Day! A 9yrs old villa ,its one of the columns has lost its concrete cover due to corrosion of ... A: I must know more about your problem, to decide about the thickness of plates. This is a design ... | |
| Ties for column | 10/18/2011 |
| Q: On my project we have column which is trapezoidal shape.Size of column is 2.1mx 1.1 m. column is ... A: As you suggested yourself , the straight development length is the key of such a problems. If you ... | |
| strengthening of column | 10/18/2011 |
| Q: Good Day! A 9yrs old villa ,its one of the columns has lost its concrete cover due to corrosion of ... A: Concerning your problem about corrosion which is a frequent question in Dubai, I think steel ... | |
| Impact Noise near Bridge Expansion Joints | 10/14/2011 |
| Q: Impact noise near Bridge expansion joint while driving We have observed impact noise near Bridge ... A: Something very important in bridge design is related to design of supports which are located in ... | |
| Civil Engineering work from home | 10/6/2011 |
| Q: Is there any available "WORK FROM HOME JOB" available for Civil Engineering Technical Work. If so, ... A: Great idea, but in our country no such a topic is available in civil eng field. You must look for it ... | |
| Planning | 10/5/2011 |
| Q: How to calculate the weightage of a project or activites in construction ? In what basis it is fall ... A: The weight of activity must be calculated on a real physical basis to show the real progress of the ... | |
Civil Engineering
Answers by Expert:
Babak Esmailzadeh Hakimi
Top Expert on this page
Expertise
I can answer questions in Structural Engineering, Earthquake Engineering, Project Management and Project Control topics!
Experience
I am experienced in the area of earthquake engineering in electrical power industry, i.e. Lifeline Earthquake Engineering. My focus has been on structural seismic design of power installations. Recently I have got involved in project management in the category of constructional engineering.
Organizations
Sinam Consulting Engineers Co.
Education/Credentials
Bs degree in Civil Engineering from Ferdowsi University ,1988, Mashhad Iran, Ms degree in Earthquake Engineering, Sharif University of Technology, 1993, Tehran, Iran
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