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Hi Guys, Need clarification, when we have two buildings separated by expansion joint of 2"(normally). How does we can strict these buildings for 1" max. deflection. It is difficult with moment frames. For steel building with bracing it is ok but with moment frame, building deflection cannot be...

This is regarding steel deck. How chords can be designed like truss and or they can be welded to the soffit of steel beam.

How can we manually check the design of diaphragm with openings or if the building is U or L shape.

Torsional moment according to Clause 4.1.8.11(10) say ex+0.1Dnx. But according to commentary page J-49 explanation according to clause 4.18.11.(9) 178. says 0.05Dnx also for flaxible diaphragms, as in the case we have flexible diaphragms, can we use 0.05Dnx for torsional eccentricity. If anyone...

Foundation design as per new concrete code which should be similar for all provinces required foundation to be checked for SLS and ULS i.e. serviciability limit state and ultimate limit state. Secondly for overturning code says that 0.9 times the dead load you can check for with other load...

How much effective these are as compared to moment frames not considering the cost issue.

it's a 2 storied shopping mall. Architect needs a moment frame. Structural EIT if you don't mind, can u attach some pdf to show this concept, it's look interesting and economical too. Actually for my case, i know there is no replacement to braced frame, if you want frame to deflect same for...

This all depends on the height and allowable bearing capacity. A rule of thumb is to have a base equal to 0.6 times the height of wall, but when you have low bearing capacity this rule does not work and this ratio might approach to unity.

Lateral deflection of moment frame is difficult to handle. Calculation showed that moment frame is 100% expensive than ordinary braced frames. Is there any other option expect to moment frame when we have no option to provide bracings.

You are misinterpretting the ACI Clause, by calculation you required a spacing of 5.18" and max spacing by ACI restrict in these situations where you have excessive shear stresses vs, shear strenghts. As Vs which is (Vu- phi Vc) /phi exceed 4 sq. rt fc'b.d, then spacing as per ACI should be half...

Yes contractor will finish before freezing temperature or you can say finish concreting, but cannot apply asphalt topping in freezing layer. It is difficult to change the tendered items. It is safe to expose concrete for three or four months of exposure to hardened concrete as normally exposed...

One way of providing expansion joint is to have double columns at joint. Another is you can have horizontal slotted connection for a box structure cut in half for example. If you cut a square in four pieces and allow to move independently at expansion joint location in both horz. directions. How...

Hi Guys, We have designed a one storied concrete flat slab structure for underground parking garage, the deck of which serves as a parking on top. It is in construction and contractor want to expose the slab in winter, as he can't finish in one month time. He is of opninon that protective...

But in ETABS as i talked with those guys they told that only composite beam makes compression flange as braced not the ordinary steel deck which is unfilled. Although we are welding it and making it braces.

When you are saying large grade beams at ends, you need to talk about the end portion of shear wall which actually should take the tensile or compressive forces acting on the wall. Secondly if you are designing shear walls as a deep beam then you have to add reinfocement in all portion of the...

We are designing loading dock slab on grade for trailer loadings. Client don't like to use welded wire fabric due to its poor quality and having past bad experiences. We want to suggest steel fibre reinforcement in concrete. It all depends on the fibres type. How it can work, it's modulus of...

Hi Faromic, Actually i have the problem in my 3D Model that in addition to the fact i modelled steel deck it was not assuming beam top flange as braced. That is what we check the maximum moment capacity of the section, but the program ETABS (In fact SAP belongs to the same family) was giving...

Thanks Guys, Two plates will work well, one embedded in concrete and other bolted from inside of the column and it adjust the levelling requirements if any. We are using W sections. But in case they are HSS, Haynewp suggest telescopic arrangement. How does it works, how could the member...

Well it depends on your computer model infact. If you modelled all the joints as pinned, you have only axial forces in that joint, but if you modelled it as a moment connection with no release then you have to check that how much eccentricity that moment is causing on that particular weld or...

Hi Guys, What is the maximum limit of building dimension related to expansion joints for steel and concrete structures.I think in anycase structure should ideally be checked how much it expands or contract for any material type. There should be some rule of thumb also for countries having more...