Recent content by canstruct

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...