Let me start of by saying I love this site it has helped me tremendously over the years. I have been doing free lance design work on the side for awhile and I have reached the point where I am getting job offers to do BIM Design for a few of my clients. The problem is what to charge for design...
Let me start off by saying I admire your courage. You are doing the exact same thing I would like to do one day. Start my own design company. I feel that if you're a good designer who keeps his word, there is the potential to do very well in this industry.
As a design manager I would give my...
When calculating the suction pressure for a fire pump I use the formula Ps= Pr - Pfl +/- Pe
Pr = Residual pressure of water supply (Since my tanks are at ground level this would be 0
Pe = Elevation changes in my pipe in relation to suction flange elevation
Pfl = Pipe friction loss this also...
To my understanding if the tank is sitting at ground level and that is the only source of water supply. Then to satisfy my sprinkler demand my pump will have to produce enough pressure to supply the demand because the water will produce very little.
Funny that you mentioned a tank because that is the new development. The school wants to provide (2) 21,000 gallon water tanks on concrete foundation. With a 6" line from the tanks to the fire pump. To my understanding my most demanding area on either system will be ord. Hazard. So .20 X 1500 Sq...
Thank you for all your help. Your answers have been very useful. When an architect calls out a 50 hp pump but has no idea of existing water flow conditions due you senior designers take this as a general statement. Therefor you continue to size the pump towards what you feel is needed not...
Let me start off by saying that this website is a HUGE help for a young designer like myself. I'm working on a high school design that will have 5 systems. The water flow for this area is very poor and the School district, Architect, and GC are now exploring the option of adding a fire pump...
