The luteal phase of the menstrual cycle is about the same length in most individuals (mean 14.13 days, SD 1.41 days) whereas the follicular phase tends to show much more variability (log-normally distributed with 95% of individuals having follicular phases between 10.3 and 16.3 days).
The minimum size joist to be used in deck construction is not a stand-alone consideration, and is related to the number of footings and beams that will be installed. In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. The larger the deck, the larger the joists. In typical deck construction, with a ledger on one side of the joist and beam on the other, the size of the joists is driven by the size of the deck based on the general maximum spans mentioned above.
These are usually placed 16 inches from centers, except for floors which are to carry very heavy weights. In these the joists are frequently placed 12 inches from centers. To estimate them 12 inches from centers add 1 to the number of feet in length of one wall on which the joists are placed.For example, suppose a building is 32 feet long, and the joists are placed 12 inches from centers.We simply add 1 to 32, which makes 33 the number of joists required for one span.f the spans are unlike, then estimate each span separately. If the joists are placed 16 inches from centers, then multiply the length of wall by Â½ and add 1. This will give the required number. Thus if the wall is 32 feet long, then 32 x Â½ + 1 = 25, he number required for one span.