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Hi Everyone, We are reinforcing a corroded existing W16x36 with two centred C12x30 channels. I would like your opinion on how to determine the efforts on the connection bolts and their spacing as the shear flow is null. I detemined the maximum force from the stress on the half top of the...

Hi Everyone, We are reinforcing a corroded existing W16x36 with two centred C12x30 channels. I would like your opinion on how to determine the efforts on the connection bolts and their spacing as the shear flow is null. I detemined the maximum force from the stress on the half top of the...

Hi everyone, Does anyone have any information where we can have any code discussion about the Torque Reduction Factor (β = 1.08 - 0.186(μL) + 0.0099(μL)2 ; µ = √(GJ/ECw ) ; L = span) for the calculation of the lateral bending moment of a monorail beam ? I couldn't find any reference. thank...

Hello, Can anyone tell me how to calculate the lateral pressure coefficient on the wall in this case ? I couldn't find any reference in the internet. I'm not sure it's the same for a retaining wall with infinite soil ((1-sinΦ)/(1+sinΦ)). Thank you.

Hi everyone, We want to provide a slab foundation for a new steel tank (22.5' diam, 12' H) inside a building which already has a general slab of almost 2 feet over concrete piles as shown in the sketch below. My question is: can we constrcut the new foundation over the existing slab with no...

Hello everyone, I'm calculating a runway beam with a combined section of W920x223 and a cap channel MC460x63.5. The W section is class 1 and the channel is class 3. Would you please confirm the following: - the combined section is supposed to be 3. - the upper equivalent flange is class 3. -...

Dear soil experts, We have to calculate settlements for some foundations of different types within an industrial project and we are facing a very soft clay layer of 7.5m thick at 5m depth. In some cases the applied loads are almost equal, or sometimes even less than the excavated soil load. Is...

Hello, Could you please tell me how to design the bond beam (ring beam) in the middle of a high masonry wall. Shall it be designed to support the masonry wall weight above it ? Thank you for your help.

Hello, I'd like to have a clear interpretation of the the below requirement of BS CP2012, Part 1 Cl.3.5.7, if possible with some sketchs. Is 600 mm spacing between reinforcement layers or between bars ? what is cube reinforcement ? Is it equivalent to shrinkage ratio 0.0018 in ACI ? I think only...

Dear all, I'm not really accustomed to precast piles. I need some help from you guys. Does anyone please has an idea why the driven precast piles are not perfect square. (see attached drawing) Is it mandatory ? Is there standard sizes and reinforcement for precast piles ? Thank you...

Hello, Does anyone have a full and detailed example for driven precast concrete pile ? Thank you

Hi, Does anyone know a procedure that describes how to repair columns (60 cm of diameter) with high chloride content that caused rebar corrosion. The chloride content is higher than the maximum allowed by the code up to more than 10 cm deep in the column. Thank you.

Hello, I'd like to check the stability of RC columns against the reactions of a space frame. The columns' height is 12 m and their diameter is 60 cm. The issue is to decide the effective length factor value to adopt for this case to determine the critical buckling load Pc. At first sight, the...

Hello, The structure is a space frame supported on 15 RC columns (3x5). Columns height is about 12 m, their diameter is 60 cm. 5 columns, on the same axis, present vertical cracks in their mid-height in addition of a visible deflection. A site visit will be arranged in the comming days and...

I'm designing a block foundation of 2.6m x 9.6 m x 1.6m for a heavey machine. I would like to know the minimum required reinforcement. I'm note sure if the equation (A/100) given in the ACI207.2 is applicable for metric units. Thank you.