how much weight can a 8x8 post hold

Left side are different so watch what you are getting. I am not sure I understand the arrangement, a photo would help immensely, or a sketch. Snow load? Change that front double two bye ten to read 16' before you show the thing to the town!! The higher your deck is off the ground, however, the less weight per square foot it can take. Standard treated wood has about 0.06 lbs/cubic foot chemical retention while wood treated for ground contact has about 0.15 lbs/cubic foot. document.write('') That book you referenced was very informative, btw. Measure the length and width of the top surface of the concrete pad in inches and then multiply them to get the pad's area in square inches. Therefore the length of the joist 12 divided by 2 =6 , multiplied by the length of the beam 6 = 36. First, you divide the tributary load of 1500 - the weight-bearing capacity of the default soil type used to determine building codes. Modulus of elasticity also referred to as Tensile Modulus or Young's Modulus. JavaScript is disabled. The book looks "old", too. You indicate that the four posts support two 24 foot long beams. For that reason, most large timber frame operations carry their own in-house grading and engineering and then of course the liability coverage to protect themselves. The calculation method is different according to the force mode: 1) Tension action 2) Shear force action 3) Bending moment action 4) Torsion 5) Multiple load combination action Finding the stress and deflection deformation is mainly related to the parameter properties of the load and the section, and then find the formula and set the formula. If a couple of lags and screws make you feel better, GO FOR IT. WOODWEB is a registered trademark of Woodweb.com. The load capacity of a 3-foot #2 grade 44 is 17,426 pounds, and a similar 66 is 20,834 pounds or 16% better. I am building a supplies loft that is 24' x 24'. Insert 1 eyebolt into each hole that you drilled. Framers generally nail together several pieces of dimensional lumber to create such . If you use the right ones in the wrong place, it sure confuses things. For example, a brick wall is going to be much stronger and able to hold more weight than a drywall. A six bye six hem-fir post is good to about 26,000 pounds compressive strength. If your 22 is 12 feet long, multiply 12 by 0.44 to get 5.28 pounds. I don't know where you are located but around here the 8x8 PT posts are located next to the 6x6 PT posts in all three building supply stores. That makes approximate sense, as the ratio of the area of a square, with side 2r, to that of a circle w/ radius = r, is 4 to 3.14. Calculate the weight of the snow on your roof. This allows the even distribution of weight through the legs. The same calculation can be used to figure the weight for pier (b), however instead of using 3 feet for the beam span you must use 6 feet to adjust for half the span in both directions. The flat-faced 24 wood can withstand 20-30 pounds of weight without deforming. All load capacities are based on axial loads with no moments. Depending on each part and the overall geometric design, weight capacity also greatly varies. Considerably Higher Load Capacity Than Traditional Posts.