For fall arrest system anchor point must be withstand min. 5000 lb force/person. However, what is OSHA recommended fall restraint anchorage point minimum capacity? Is it the same as the fall arrest anchor point? I have read min. 1000 lb/person for fall restraint anchor point in some technical...
What are the requirements to exhaust low-heat industrial appliances? Industrial oven rated 500 F and needing exhaust duct to flue hot gases out. I was informed to use class A double wall insulated duct and most of the duct manufacturers are not familiar with this classification. What is the...
I am working on a project to install utility support frame. The utility load rate estimated 10 psf. The roof assembly is consists of cold formed steel joist, hard ceiling and metal deck roof top as shown in the attached picture. we are planning to install the metal deck prior to the hard...
I need help to specify burst pressure and burst temperature of rupture disk. Operating condition of system: nitrogen compressed gas thru dia. 1" tube vessel working pressure 4500 psi. compressed gas supply pressure 2500 psi @ ambient temperature, 400 cfm. outside temperature -40F to 140F...
Need help to calculate pipe size for nitrogen gas (from tank to pressure regulator). known values are inlet pressure from tank 1500 psig, length of pipe from tank to pressure regulator 300 ft, flow rate 600 SCFM (17000 slpm), assume 5% pressure drop for fittings, pipe end will be connected to...
Four pumps in parallel with VFD control on each pump will be used for my project. total head 432 ft, required total flow 130 gpm and there is a bypass circuit to the system. the manufacturer recommended min. fluid flow of 7 gpm for each single pump. the min. demand flow rate is 10 gpm. i have...
If possible, I need an example or excel spreadsheet calculator on how to calculate or generate pump system curve for branching system with multiple destination (with various pipe size) and single source of fluid (single pump). I believe this is different than a system consisting of a single...
Is the total static head in the attached diagram (B+D)-A or (D+B+C+B)-A.https://files.engineering.com/getfile.aspx?folder=1c2be0eb-53b1-462e-a91b-98432a616df1&file=head.pdf
What is the best practice of fillet welding for steel undergo vibration? Someone informed me that it is preferable the weld perpendicular to the vibration plane? Is this true. It is a 12" long 1/4" fillet weld size.
I need help to design/size compressed air system that includes compressor, air dryer and receiver tank. Given data are the air demand, air pressure and running time to start an engine. It would be great, if you direct me an example on how to size air compressor, air dryer, and receiver tank.
I am working on a project to fill several pits inside an aircraft hangar with concrete. Pits are 5ft by 5ft and 5ft deep in size. My questions are: do I need re-bar, what is the best solution to avoid shrinkage. Any feedback would be appreciated. previously pits were used as media reclamation...
A two story office building will be constructed inside existing industrial building. The existing building has movement joints (expansion joints)on concrete floor. The new two story building (135'X45') will be built crossed over existing concrete slab expansion joints. New building will not be...
How do I calculate compressed air flow rate in CFM using diameter of pipe, density of air, temperature of air, and pressure of air at drop station? I used the equation Q= (area^2)* sqrt((2*pressure/density)) but my result is not matching with the graph shown in the link below...
I am working on a project to install industrial shop in an existing storage area. Existing floor in the storage area is 18 inch thick asphalt pavement and the shop needs a concrete pavement. golf carts and forklifts will be operated over the new concrete pavement. I was told to remove 6" of the...
What is the deflection limit requirement for anchorage point (fall arrest system) that is installed on roof truss? I noticed the following statement on OSHA website 1910.66 App C.
"The anchorage should be rigid, and should not have a deflection greater than .04 inches (1 mm) when a force of...
Can someone explain to me on how to use the design response spectrum curve? I developed the curve base on acceleration values that I determined for T0, Ts, 1, and TL periods. I also calculated approximate fundamental period of 2 story building frame. I am not sure what I need to compare next.
I am working on a project to install a split system air conditioning and the condensate unit will be installed 20' above the air handler unit. Usually condensate units are installed on ground. Would it be any problem if the condensate unit is elevated above the air handler unit?
Thanks
Do you see an issue if i connect condensate return from tank coil to an elevated return line without pump. Steam source is 105 psi. Elevation difference between condensate trap and tie-in location is 20'. Check value will be installed after trap.
I am working on a project to install a vehicle exhaust removal duct system in car repair shop. if possible i have a question, how much exhaust fume does a vehicle produce while the engine is running in CFM eg. pickup F150.
