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.....l and I will be using a concrete footings.
Thanks for all of the great feedback. The land where I am building is good draining gravel and I will be using a concrete footings. I figure I can do the footing myself and keep costs down. I am calling it a crawl space but since I have to dig down to 4’ for the frost depth I will be building a 6’ tall wall. I figure 4’ below grade and 2’ above. I plan on using the specs for a basement when planning my foundation.
I read through parts of the pamphlet provided by southerpine. There are many discrepancies between what they call "possible" designs and the actual requirements by the codes of the state of NY, where you are located, or the ICC.
NO. Read the PWF info, look at the illustration. No concrete footing; crushed stone. Follow the PWF cookbook. The only concrete is the slab floor that is poured after the PWF is in place (if you are doing a basement or tall crawl space. Info D/L here http://www.southernpine.com/applications_permanent-wood-foundations.aspit's where John got the illustration I believe
Technical Report (TR) No. 7 and Wood Construction Data (WCD) No. 6 do not clearly identify a concrete footing as an option to gravel beneath a basement wall. Figure 19 on page 32 of Southern Forest Products Association (SFPA)'s PWF Design and Construction Guide, however, does include a concrete footing under an exterior basement wall as an option. You will notice that if a concrete footing is used, gravel, crushed rock or coarse sand is required along the sides of the concrete and beneath it or alternately, drains through the footing are required. It would also be ok to combine both methods.The above methods allow water to move to the designated drainage area. The preferred method of drainage is by gravity to day light. Other options include use of a sump or drainage to a sewer.
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