Hello!
I am currently working as a Project Manager's Delegate for a construction contract, and would like to seek for your advice on the following:-
Background: A PMI was issued to instruct the Contractor to adopt alternative construction method for the works under the Contract. The...
Do anyone know the intention of NEC3 ECC to split the duties of the Employer into two independent roles, i.e the Project Manager and the Supervisor?
Why there is any needs to allow two parties, one responsible for testing and defect, one responsible for others contract administration issues?
Hello everyone!
I noticed that a minimum concrete strength is usually specified in designed code for concrete subjected to extreme environmental condition (eg. marine concrete).
Could anyone explain the purpose of setting such a limit?
For example,
In BS6349, minimum cube strength of marine...
Hello everyone!
I involved in a marine foundation project where rock socketed steel H-piles were constructed (see attached).
The piles are roughly 20m deep sitting on the bedrock, each pile consisted of a permanent steel casing of 610mm dia. inside placed with a steel h-section.
Grout of...
Hello!
In my country, grout for pile is tested to ensure compliance with the following criteria:
1. 28 day Compressive Strength
2. Flow Cone Efflux Time > 15s
3. Free Expansion < 10% in total
4. Bleeding < 2% in first 3 hours; < 4% in total and 24 hour reaborption
I understood that the control...
Hello!
I know that both Colebrook White Equation and Manning Equation are commonly used for the design of gravity pipe flow.
However, it is more common in my country for people to use:
1. Colebrook White Eqaution for gravity pipe flow
2. Manning Equation for open channel flow
Does anyone...
Hello!
According to my understanding, Stiffness Matrix Method is often applied for structural analysis (both computer and manual) in obtaining the forces/moments in structural elements.
However, it seems that the Stiffness Matrix Method and the Beam Curvature equation only works when the...
Hello!
I am designing a simple rectangular RC structure (8x8m) with 2 stories (A superstructure and substructure of 4m height respectively).
1.The structure consists of 4 columns (400x400mm) in 4 corners extending to the raft foundation.
2. The ground floor slab (200mm) and top slab (200mm)...
Hello!
I am designing a raft foundation (4m x 7.65m)(~600mm thk.) sitting on Grade III or better rock (bearing capacity ~ 5000kPa). I try to design it as a rigid foundation (ignore the subgrade interaction and flexural deflection).
I commonly use the equations in the book "engineering in...
Hello, I am new to SAP2000 computer modelling.
I recently did a modelling of a 3D RC frame but I am confused of the result that I obtained.
I am designing a pumping station which is a very simple RC frame model. I have modelled the entire RC frame in 3D and I have also modelled the structure...
I am modelling a RC frame structures founded on a thick mat foundation, and the mat foundation directly sit on rock as the rock level is shallow.
I model the RC frame structure and the foundation seperately in SAP2000 and SAFE, and I would want to know:
1. For the RC structure, shall I model...
I am designing a pumping station (water retaining structure) and I found difficulties in complying with the crack width requirement in eurocode based on the forces I obtained from my structural analysis, and I got a few questions regarding the procedures to calculate the design crack width in...
