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Hi all, I have created a system curve and overlaid it on the centrifugal pump curve provided by the manufacturer - see attached file. I would like to install on nozzle at the end of my pipework so that I can achieve about 2 l/s flow at 30m of head but not sure how to include the nozzle in my...

Hello all, I am trying to analyse segment of the pipe as per attached sketch. I drew a simplified thrust force diagram from system pressure and mass flow. Between point 1 and 2 there is a restrained flange adaptor or flanged joint. Would I need to consider longitudinal stress coming from...

Hi all, Let's assume I have a borehole pump 50m below ground. The dynamic water table during drawdown is 30m beloow the ground. Now I need to lift the pump assembly together with pipework that is filled up with water. The pump is equipped with NRV valve. For the initial lifting: - can I...

Hi all, I have a case where a new outdoor mild steel structure is properly protected from aggressive environment (all epoxy coated) apart from anchor bolts and nuts... These are made of plain carbon steel with no coating so quickly got rusty finish. The location is within 10 miles from the...

Hi all, I have a project where I need to fill up about 60m3 of existing humus tank as per hatched area in attached file (dims in mm). The new working height of the tank will be only 1300mm and store water. The new formation level would be built on top of hatched area and probably in the form of...

Hello, I have a task where the chamber and tank are connected together by a pipe that conveys fluid based on gravity principle. The pipe inlet will be open and in a form of a weir. The outlet into the tank submerged. What is the maximum liquid level I can reach in that tank so that the inlet...

Hi all, I want to design a reinforced concrete base for an open top steel tank. The tank has a diameter of 25m and height of 2.9m. I am thinking about the base that is 150mm thick, thicker around the circumference. Most of the time the tank will be empty. The maximum pressure that will be...

Hi all, I need to connect hollow section with a channel beam as per attached drawing. The hollow section is 150x100x6 and channel profile 150x75x18. They made part of the structure supporting checker plate flooring that will be bolted down to top flanges. I believe I can treat it as a pinned...

Hi all, I want to make a simply supported joint between column and beam for the attached arrangement. The column is made of a screw pile which comes with the welded plate on top. The beam would be supported by that plate on both ends. I don't want to transfer moment through these joints. I...

Hello everyone, Please have a look at the attached file. The resultant forces and bending moment have been calculated around the point A. To counter sliding from horizontal force the wall has been tied to existing slab. In the bearing capacity (drained conditions) equation as per EC-7 (and...

Hi all, Could you please have a look at the attached sketch? I am looking for the way to design strip foundation underneath this wall. The forces are given there and are as follows: Resultant sliding force: 10.3 kN/m Resultant destabilizing moment about point A: 4.2 kNm/m Vertical resultant...

Hello, Could someone please give me some tips on how to size the bolt as per attached sketch? Can I assume the the rotation would occur around the corner of the angle profile and then the force in the bolt with specific level arm would need to be equal but with the opposite direction to this...

Would anyone be able to give me some tips on how to design the plinth (reinforcement) as per attached two sheets I received from Xylem, please? I have dimensions and anchor forces - attached. It is a dry installation for Flygt NT 3301.180 HT. To be honest forces are quite small and I don't see...

Hello all! I have 8-bar pressurized clean water system with 50 mm ID pipework and a hydrant. On this hydrant I want to install orifice plate and connect 50 mm hose. However I am limited by a maximum flowrate behind orifice which can't be higher than 5 m/s. The equation everyone is familiar...