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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...

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...

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.

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...

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 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...

Hi Guys, We are designing a mall with concrete flat slab structure supporting steel structure at its top. How we can connect steel column above concrete structure. Architect don't want to expose the base plate and anchor bolts. If we provide a recess of 6" (2" grout+ 1" plate+ 1.5" max for...

Hi Guys, I need information regarding the usefulness of closure strip in concrete slabs. What i heard is that, when we have multistoried structure joined to single storey structure, this strip have to be defined there to reduce the stresses caused by settlement of the highrise structure. Is is...

Hi Guys, We have a situation where block masonry can't resist the required seismic force and we need the conventional steel bracing. But the problem is architect want to infill this with concrete block. I am proposing steel plates, so that the block can be cut with slotted portion at the...

Hi Everybody, I am designing structure for mechanical units which is located above grade level. Spans are large and we need to provide composite steel deck. Requirement is to place mechanical units having some sort of moving load and the some area should have a capacity of resisting live load...

Hi Guys, I am designing a 3 storied wooden house. Problem i am getting is this that the walls from 2nd flr to roof are not lying under the walls below. Almost all the walls are off center and i am having difficulty in designing the floor at 2nd floor level. Can i distrubute the load coming from...