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The grade away from foandatlon walls shall fall a mznimum of 6 ~.n. within the first 10 ft., except ~s restricted by lot lmnes where the fall will be a minimum of 6 in. regardless of the horizontal d~stance available. R-301.3 Basement walls, foundation %;alls, porches, carport slabs and steps exposed to the weather, and garage floor slabs shall have a minimum specified compressive strength of 3000. TaBle No. R-302.2 Footings sections: 12 in. wide - 1 story; 15 in.- 2 story, 18 in. 3 story. Footings /~.h~ll extend not less than i-~ in. below the finish natural grade. R-303 Foundation walls shall extend at least 8 in . above the finished grade to the founda- tion at all points. R-304.2 t4aaonry and concrete foundation walls shall be constructed using the following criteria: Drains ~hali bl Pro"vided'around all concrete or masonry founda- tions. Perforated pipe or other approved systems or materials shall be installed at or below the area to be protected and shall d~scharge by gravity or mechanical means into an approved drainage system. 305.1 Exterior foundation walls of masonry construction enclosing basements shall be dampproofea. Foundation walls of habitable rooms located below grade shall be waterproofed. R-306.1 The minimum net area of venti- lation openings shall be not less than 1 sq. ft. for each 150 sq. ft. of crawl space area. Openings shall be within 3 ft. of each corner of said building. ~. An access crawl hole 18 in. by 24 in. shall be provided to the underfloor space. R-309.2 10. The under floor grade shall be cleaned of all vegetation and organic materials. R-309.3 12. 13. 17. 18. Bathrooms shall be provided wlth artificial light and an approved mechanical vent~la- t ion system capable of producing a change of air every 1l minutes or a win~o~ of not less than 3 sq. ft.~ one-half of which must De operable. R-203.3 Every sleeping room s~all hays an exterior door or not less than 5.7 sq. ft. of openaDle wlndow. The min. net clear open~ng height shall be 24 inches. The min. net clear opening w~dth shall be 20 inches. The finished sill height shall be not more then 44 inches. R-210.2 Ail habitable rooms shall be provided with aggregate glazing area of not less than 8 percent of the floor area of such rooms. One-half of the required area of glazing shall be openable. Where bottom of glass light is wlthin 18 in. of floor and all glass doors and wall panels of bathtub and shower enclosures, must be of laminated, tempered or wire glass, R-208.4 Openings between the garage and residence shall be equipped with solid wood doors not less than 1 3/8 in. in thickness or equivalent 209.1 The garage shall be completely separated from the residence and its attic area by means of 1/2 in . gypsum board or equivalent applied to the garage side. R-209.2 Not less than one exit shall be provided from each dwelling unit. The required exit door shall be a side-hinged door and not less than 3 ft in width and 6 ft 8 in. in hr. B- 211 Stairways shall not be less than 3 ft in clear width, and the headroom shall be 6 ft 8 in min., rise 8 1/4 max., and run of 9 in. min. R-213.1 Handrails having min. and max. heights of 30 in. and 34 in. respectively, measured- vertically from the nosing of the treads, shall be provided on at least one side of stairways of three or more rises and shall be continuous the full length of the stairs and shall extend 6 inches beyond the top and bottom rises. Ends shall be returned or shall terminate in newel post or safety terminals. R- 214.1 V. 7-91 MC 15~12