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Based upon the 1971 Building Code. 49 pages…. More >>
Two Way Slab Design: Supplement to the CRSI Handbook
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what are the (dis)advantages of a fixed dining table design (granite slab and two wooden bench) ?
I would like some suggestion on the dining table design
The design that I have in mind is a fixed concrete/granite slab with a support on either sides or one side
connecting to the wall with covered wooden benches (top side cushion) and shelves with door on the easily accessible side.
What, if any, are the problems with the concrete slab table design ?
hey im just trying to work out the design load for a slab
Its to be for a proposed library which is to accommodate reading rooms with book storage
Imposed loadings extract from BS 6399
Reading rooms with book storage = 4.0 KN/m^2
so to work out the self weight of the slab
its the
density x span x effective depth
but to get the design load do i need to multiply it by 1.4 for the dead load or by 4.0 for the library imposed load?
Not familiar with that particular code, but, you have a bit of an error elsewhere. The loading given for the library is probably a live load, to be multiplied appropriately and added into the slab self weight. How you add them depends on the load combination you are using, which might be where you put that 1.4 to use. The 4.0 is not a factor, it is another load.
Victoria, BC, Canada. Humbolt Supportive Housing. CLH Architects. Seeding glass into a concrete slab. www.sdconcrete.com
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A slab is designed with 30mm cover to r/f and C35 concrete.But,poured C30 concrete.HOW IT EFFECTS 4 DURABILITY?
FACTORED DESIGN LOAD=8.4kN/m2.A load test was done and found no cracks and only 2.12mm max.deflection was taken place.Therefore it withstands for design load(8.4kN/m2).Now the problem is durability as covering of already casted slab can’t be increased.What is your opinion?
The durability of the slab is a property of the concrete. The water-cement ratio, the finish, and curing method will effect the durability of the concrete. If outside the total air content of the concrete also effect the durability of the concrete.
You can increase the durability of a slab with coatings. Talk to your local admixture rep, Sika, Master Builders, Euclid and discuss with them what you are looking for. They will have something, but depending on what you are looking for, it will cost $$.
Cheers and good luck!
could some one show me how to design suspended floor slab please?any referece books or websites would be great?
design A typical suspended floor slab. Your design must include any
supporting secondary and primary beams and must include checks of moment and
shear capacity (at the ultimate limit state) and appropriate serviceability limit state
checks. Temporary as well as permanent load cases must also be considered.its 8m by 5m(typical),and it has 1st,2nd,and 3rd floors.thank you very much
its a part of a multi-storey building. The suspended floor slabs are to
support a characteristic (i.e. unfactored) imposed load of 5.0 kN/m2 and an additional
characteristic load of 1.0 kN/m2 to allow for finishes and services. The ground floor slab
(which is at the same level as the foundations) is to support a characteristic (i.e.
unfactored) imposed load of 7.5 kN/m2.
The ground investigation for the building project reveals the following:
a). The existing ground has an allowable bearing pressure of 300 kN/m2; it is
anticipated that the foundations for the building will consist of spread (i.e. pad)
foundations.
b). Groundwater containing chloride salts is found to be close to the likely position of
the foundations of the building.
There are no restrictions on the form of construction, construction methods or materials
permitted for the proposed works other than those resulting from the site conditions and
design requirements described above.
Make reasonable assu
it has 5*5 =25 coulumns
Could you give more details,,,, is the slab concrete, steel, wood, ice…..
What is the purpose of the slab? Aesthetics, supporting walking people, benches, tables industrial equipment, water tanks….
The Learning Barge: teaching about environmental and cultural ecologies on the Elizabeth River. An interdisciplinary team of University of Virginia students and faculty are collaborating with diverse community partners on an innovative service-learning project to design and fabricate a floating, self-sustaining field station. The Learning Barge, located on the most polluted tributary of the Chesapeake Bay, will provide interactive K-12 and adult education about how the river and human activities are inextricably linked. Unlike environmental education centers located in pristine nature, the Learning Barge traverses an important urban river linking Norfolk, Portsmouth, Chesapeake and Virginia Beach. Moving to a different river restoration site every few months, the Learning Barge will teach participants about the tidal estuary ecosystem, restoration efforts and the Elizabeths economic and transportation significance as a major port. The non-profit Elizabeth River Project will own and operate the field station, which will support environmental research, education and public outreach primarily to economically and socially disadvantaged children. The design harnesses energy from sun and wind, filters rainwater and gray water in a contained bed wetland, and utilizes recycled materials and green technologies. To find out more about the project visit our website:
http://www.arch.virginia.edu/learningbarge
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Been looking at house designs. What is the big advantage to having a crawlspace verses nothing or a basement?
Now, with a concrete slab design, you have no room for pipes unless you already have the spaces inlaid. Of course, you could always saw or drill into the slab. A crawspace lets you add as you need to and is much more flexible with mistakes, although it may offer poor support for heavy things above it and last a shorter time than a conventional slab. An entire basement is the best of both worlds if you can afford it. Is there anything else I should really consider?
I’ve owned houses that have been configured all three ways and these are my thoughts. In CA, there are few basements due to cave in potential with earthquakes and liquefaction soils. Crawl spaces are a real pain if you need to have work done on your plumbing or electric because there is such small space to work in. Often crawl spaces do not have poured flooring (especially in older houses) which is problematic due to insects and moisture. Slabs are also problematic especially if plumbing was installed through the slab. They are also prone to cracking in earth movement, with invasive tree and bush roots and if not properly installed, with moisture. Basements are great but difficult to insulate and heat. They also often have moisture problems especially when concrete or slump block is used in the construction or when there is improper drainage along the walls.
Online RCC Design of Buildings http://www.akses.inThe slab consist of two arched slabs which are bolted together at the ends to form a S-Shaped slab. Please tell me how to calculate the bending moment and shear force on the slab. I have already looked in BS8110 and Eurocode 2, but I haven’t found anything on it.
Here are the details of the problem;-
A question for structural Engineers?
How can I design a double curved (S-shaped) concrete roof. It consists of 2 Vertical and one y- shaped column. the bearing pressure of the ground is 50kN/m^2. The roof is prefabricatedand consist of two arches that are bolted together to make the S-shape. The concrete structure is prefabricatedon site and moved and joined together using concrete glue grout. The concrete is 1 day old when the concrete components are moved and joined together. Plus could you write a method statement and risk aassessmentfor it.
the structure is 2.3m tall by 4m long and 2 wide. the y shaped column is on the 4m long side with the Vertical columns on the other side.
You’re going to need to employ an experienced structural engineer, who has the relevant professional indemnity insurance, particularly as your asking for a method statement and risk assessment. The biggest challenge here is calculating the torques, bending moments, and shear forces in such a complex geometry. Once you have that, the specification of thickness and reinforcement should not be too difficult. You might want to try a university civil engineering department for something this unusual.