4x4 Floor Joists

The depth of a joist is what gives the floor its strength in terms of deflection.
4x4 floor joists. Using pressure treated 4x4 for post and beam construction what is the max span recommended for a 4x4 floor joist without using a middle support. 05 30 2013 12 41 pm 2. 1 16 of 245 results for 4x4 joist hanger simpson strong tie lus44z zmax galvanized 4 inch by 4 inch double shear face mount joist hanger. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction.
This size is no longer acceptable when framing a structure. Width of the joist times depth squared is a rough formula. More buying choices 6 87 3 new offers simpson strong tie huc44 4x4 heavy duty joist hanger concealed reverse flange. 4 x 4 calculation 4 times 4 squared 4 x 16 64 2 x 8 calculation 2 times 8 squared 2 x 64 128 a 2 x 8 joist is twice the strength of a 4 x 4 in deflection.
True floor joist span calculations can only be made by a structural engineer or contractor. In buildings with basements the first level of floor joists serves the same purpose. When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started. Floor joists installed on second or third or higher levels double as ceiling joists for the level below.
Joist span and spacing is set by your local building code.