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All other variables have been satisfied. Is there a limitation with regards to the maximum rack width?

Good day all With regards to Table 16.2.3.1 of NFPA 13, if one has a ceiling height of 12.2m and a maximum storage height of 7.6m one can apply E.S.F.R sprinkler protection to class 1 to 4 products stored in multiple row racks. Now under the definition of multiple row racks refer 3.9.3.7.3 of...

"You do not need to take a full range as you are not required to assume the fire is long and thin." What if the fire occurs along a rack? A rack fire would be thin and long?

Thanks for the replies guys. There is some politics behind this design and i've been asked to stick to a tree system. Just out of curiousity, what were the range sizes on a grid system that was done by anyone?

No. I'm using a hydraulic program to size the pipes. Why do you ask?

Thanks for all the replies guys. the reason i ask is because i have a riser on the main. Will the riser have to be sized to accomodate all 8 sprinklers or only four sprinklers per branchline. the riser will obviously be bigger if i have the take all 8 into operation as it needs to handle a...

would x1,2,3,4,9,10,11,12,17,18,19,20 be correct? would i not have to take a full range? e.g 1,2,3,4,5,6,7,8,9,10,11,12? I'm confused

Hi guys I have a query regarding how to take the number of sprinklers in operation. The rules state: 15.4.3 The design area shall consist of the most hydraulically demanding area of 12 sprinklers, consisting of four sprinklers on each of three branch lines. If this is my arrangement...

Hi Guys I need some assistance.... What type of valve should i use for the tank infill? Should the tank infill line have a flow measuring device to monitor the rate of infill. The above must be in accordance with NFPA std.

Hi Guys & Gals What is the maximum permissible water velocity in sprinkler pipes?

"This is not the place to ask big multi variable questions" I thought this forum was here to assist people I guess NOT!

Anyone know how i should expedite this?

Hi guys some additional info.... Roof Sheeting Heights: Low Bay is at 8.6m at lowest point and 9.7 at highest point. High Bay (Monitor Bay) is at 10.2m at lowest point and at highest point is at 12.0m System Type: Wet Pipe System. Roof Type & Slope: Corrugated Sheeting and roof angle is 3°...

Hi guys I'm new to this forum and require help in designing a system for the below mentioned: Goods stored in racks in a coco cola factory Plastic bottles, drums and boxes containing syrup/raw material. the above needs to be in accordance with NFPA. All tips welcome. Thanks

Hi guys I'm new here. I currently use the Hilti PD40, great device no problems so far.