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FOUNDATION Footings shall bear on firm undisturbed soil.~ .... 2. Fills to be used to support footings shall be engineered (report required) or sjall be concrete· S. 2~q,Q-a ,, ,, ~ Foundation secti~s'~/15 718 wide, (~/7"/8" thick and ~,~)/18"/24" depth below natural grade and finish grade are required. OUBC Table 29-a 4. Maximum slopes for unstabilized cuts and fills are 2 horizontal to 1 vertical. S__2gO3-a 5~ Provide underfloor vents of 1½ sq. ft. per 25 lineal ft. of foundation wall. Openings to be in at least two walls and ~q,~ar the corners. OUBC 2617-c~6 ~ P'rovide "~'nderfloor d~aina'g'e if space ~s subject to potential storm or ground- water accumulation. S. 2910 7. Provide reinforcement for concrete walls over 4' in height, min. #4 bar spaced; horiz, o.c. vert. o.c. Bars shall be Continuous' with overlap of min. 10 diameters. One bar 4" from bottom ~d one 4" f~om top of foundation wall· Exten'd ½ s~'ll ~olts, min. ~"' into con- crete. Space max. 6' o.c. and within 12" of 2:0ds. 18" 24" 9~ P'ro~id~ min. x access to crawl space, located not over 20' from plumbing cleanouts (OUPC 406-g) or furnace (OUMC 804-b). Pipes, ducts and other nonstructural construction shall not interfere with ac- cessability to or within the crawl space. Ot~eC2571-c VapOr barriers 'shall be installed on ground in crawl spaces and on the warm F~de of exterior walls. S. 5307 a~o The required clea'rance for wood members ve grade is 6" for mudsills, 12" for girders and 18" for jpists. OUBC 2517-c 12. All posts to be mounted on approved }upports. CONSTRUCTION REQUIREMENTS 18, A ridge board not less in depth than the cut end of the rafter is required· It shall be a vertical load bearing member when roof slope is. less than 3" in 12", OUBC 2518-g _ 19, Rafter ties spaced max. 4' o.c. are re~ quired immediately above ceiling joists which are not parallel to the rafters. OUB~ 2518-9-4 20. Roof purlins must not be smaller than the rafters they support. The max. span for 2 X 4/ 2 X 6 roof purlins is 4" X 6". For purlin sup- ports provide struts, not smaller than 2 X 4 with an unbraced length not over 8' and not flatter than 45 degrees to the horizontal to bear, j~q~...watl or ~artitions. OUBC 2518-g-5 ~ All weather exposed plywood shall be EXTERIOR type and at least C-C grade. ~AJ~tenti~n; .Roof overhangs. S. 2517-9 ~22~ Provide screened attic vents with a net ~ee area of 1/150 of the attic area (or 1/300 if half is along eaves and the balance at least 3' hi~her). S...3205-c ..... 23. Roof shall ~e sloped for drainage. Val- leys shall be supported (flat valleys prohib~ ited.) Shingles (any kind) shall not be in~ stalled on a slope of less than 4" in 12", Com- positions shingles require a 15 pound asphalt felt base sheet. Cha.pter 32. 24. Provide min. one hour fire separation be- tween garage and house. Separation shall ex- tend to roof line or across ceiling and maining bearing walls. Use min. 1 3/8" solid core door. OUBC Table 25. Enclosed Usable space under stai~s shall be provided with one hour protection on the enclosed side. S. 3305-1 26. Elements of appliances which create a glow, spark or flame shall be located a min. of 18" above ~a~age floor. OUMC 508 27. Clothes dryer located in an area that is habitable or containing other fuel burning ap- pliances shall be exhausted to the outside. ~ 1903 ~ C"lOthes dry? moisture exhaust duct is ired to 14' w~th two elbows from the dryer to its point of termination. Reduce this i3. Cross br'id~ or sO'lid"bloCk 2"' floor' ]j~n~th 2' for every elbow in excess of two. joists over 12" in depth every 8' and solid ~_~. Vent kitchen fan to outside via metal block at supports. SIN.cts. 14. Fire block studwallS and partitions ~ i"n bathrooms, water closet compartments, (including furred spaces) at f~oor, ceiling, laundry rooms and similar rooms, a mechanical soffit and at mid height of walls o~er.~lO' in ventilation system connected directly to height and alon~ stair stringers. OUBC'2517-f the outside, capable of five air changes per ~5. Garage door header shall be' min '' I hour shall be provided where there are no D. F. #2 with double cripples· ~p~nable windows. OUBC 1405-a 16. Use header, beam or rafter sizes noted (31~ Provide al~ ha'bi~able'"'~ooms with outside cj~t~9 plans. ~FFndows with net areas of not less than 1/10 · Truss'es sh'all be 'engineer approved, of floor areas nor 10 sq. ft. Every sleeping " room shall have an exterior door or not less