Deck Required To Be Below First Floor

A huge bonus of building a freestanding grade level deck is that a building permit isn t required as long as the deck s area is 200 square feet or less see 2015 irc r105 2 work exempt from permit 10.
Deck required to be below first floor. 2 a space may have more than one mezzanine as long as the sum total of floor space of all the mezzanines is not greater than one third the floor space of the complete floor below. Footings need to be at least 12 inches below settled soil to prevent lateral movement. In addition they need to be dug below the frost line which varies according to climactic zone. The rim joist boards typically 2 by 10s or 2 by 12s install edgewise around the perimeter of the first floor top wall plate also called the tie plate.
Standards denoted within this document shall only apply to single level residential wood decks attached to legally permitted existing residences. I actually failed one time on an inswing door with just a step down and then a landing. The outside of the rim joist is flush with the stud wall beneath to ensure that the house boxing and siding will be even. The bottom of all openings must be no higher than 1 foot above the higher of the exterior or interior grade adjacent or floor immediately below the openings.
Deck length shall be equal to or less than overall deck width. Most composite decking materials like trex composite decking require minimum joist spacing for composite decking at 16 on center spacing for straight decking and 12 on center joist spacing for 45 degree angle diagonal decking. Deck height at doors i ve been told the first step down had to be a landing in depth ie 4 7 3 4 down from the door opening and as wide as the door and 36 in depth. Deck guardrail height.
General requirements may be used for a 100 psf snow load condition 1. Before building a composite deck always read the installation instructions from the manufacturer paying special attention to the required joist spacing for composite decking. The international building code permits a mezzanine to have as much as one third of the floor space of the floor below. Maximum 44 inches to window sill measured from finished floor.
A minimum of 2 openings must be provided with positioning on at least 2 walls having a total net area of not less than 1 square inch for every square foot of enclosed area. Minimum 20 inches of net clear width opening. Minimum 24 inches of net clear height opening. 5 0 square feet allowed if located at grade floor or below grade.
Commercial deck guardrails such as those found at restaurants bars and at multifamily homes such as apartments or condos are required to be 42 inches high minimum. Deck material shall be 2 inch nominal dimension lumber. Local building codes may vary somewhat from this standard. This is a minimum required height for residential structure higher guards are acceptable.
In florida where frost seldom occurs some local authorities may allow you to place your footings on grade but in cold states such as minnesota you may have to dig down 48 inches or more.