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20. <br /> <br />Porches~ balconies or ~aised <br />floor surfaCeS located more <br />than 30 in. above the floor or <br />grade shall have guard:ails not <br />less than 36 in. in <br />Required guard:ails shall have <br />intermediate rails or ornamen- <br />tal closures which will not <br />allow passage of an object <br />in. er more in diameter. <br />214.2 <br /> <br />21. <br /> <br />smoke detectors shall be <br />installed outside of each <br />separate sleeping area in the <br />immedia%e vicinity of the <br />bedrooms and on each additional <br />story of the dwelling including <br />basements . In dwelling units <br />with split levels, a smoke <br />detector aced be in,tailed only <br />on the upper level, provided <br />the lower level is less <br />one full story below the upper <br />level, except that if there is <br />a door between levels then a <br />detector is required on each <br />level. All detectors shall be <br />connected to a sounding device <br />or other detectors to provide, <br />when actuated, an alarm which <br />will be audible in all sleeping <br />areas, R-215.1 <br /> <br />22. <br /> <br />In new construction, required <br />smoke detectors shall receive <br />their primary power from the <br />building wiring, Smoke detec- <br />tors may be bat%cry operated <br />when installed in existing <br />buildings. R-215.2 <br /> <br />Firestopping shall be provided <br />in the following locations: in <br />concealed spaces of stud walls <br />at the ceiling, floors,soffits, <br />drop ceilings, between stair <br />stringers and at openings <br />around v~nts~ pipes~ ducts, <br />chimneys and fireplaces at <br />ceiling and floor spaces. R- <br />402.7 <br /> <br />24. <br /> <br />Foundation cripple walls shall <br />be framed of studs with a min. <br />length of 14 in. or shall be <br />framed of solid blocking. R- <br />402.9 <br /> <br />25. <br /> <br />The area within the foundation <br />walls shall have all vegeta- <br />tion, ~op soil and foreign <br />material removed. R-~03.2 <br /> <br />Rafters shall be nailed to <br />ceilin9 joists to form a con- <br />tinuous tie between exterior <br />walls where joist are parallel <br />to the rafters. Where not <br />parallel, rafters shall be tied <br />with a rafter tie, located at <br />or near the plate as practical. <br />Rafter ties shall be spaced not <br />more than 4 feet on center. <br /> <br />27. Ridge board shall be at least 1 <br /> inch nominal thickness and not <br /> <br />28. <br /> <br />less in depth than the cut end <br />of the rafter. At all valleys <br />and hips there shall be a <br />valley or hip rafter not less <br />than 2 in. nominal thickness <br />and not less in depth than the <br />cut end of the rafter. <br /> <br /> When the roof pitch is ~ess <br /> than 3 in 12, melnbers <br /> ins rafters and ceiling joisl~ <br /> such as ridge beams, hips and <br /> valleyS, shall be designed as <br /> beamS. R-702.3 <br /> <br />Wood trusses shall be designed <br />in accordance with approved <br />engineering practice. TrusSes <br />shall be braced according to <br />their appropriate engineered <br />design. Truss members shal~ <br />not b~ cut or altercd \~nless <br />so designed. R-702.9 <br /> <br />Ail plywood, when designed <br />be exposed in outdoor applica- <br />tions shall be of an exterior <br />type, except that plywood roof <br />sheathing exposed to <br />underside may be of interior <br />type with exterior glue. <br />703.1 <br /> <br />Provide screened attic vents <br />wit~ a net free area of 1/150 <br />of the attic area (or 1/300 if <br />half is aloi%~ eaves and the <br />other half itl the upper <br />por~iios) . R-707 <br /> <br />A readily accessible attic <br />access framed opening not less <br /> <br /> than 22 in. by 30 in. shall <br /> provided. R-708 <br /> <br />33. Fireplace and chimney con- <br /> struction shall conform to <br /> chapter 9, <br /> <br />34. INSULATION REQUIREMENTS : <br /> Buildings with high-efficiency <br /> heating equipment shall be <br /> insulated as follow: <br /> R-30 (roof/ceiling assemblies <br /> in which has a slope of 3 in <br /> greater, may be <br /> R~ll~ underfloors R-19, <br /> heating systems, ceilin~ <br /> (vaulted ceiling R-19) <br /> R-19 and under floor <br /> <br />12 or <br />walls <br />other <br />R-38 <br />walls <br />19, <br /> <br />create <br /> <br />Elements of appliances which <br /> a glow, spark or flame <br />shall be located a min. of 18 <br />in. above garage floor. M- <br />1114 <br /> <br />Appliances subject to ~%echani- <br />cai damage shall be guarded by <br />a protective barrier. M-1114 <br /> <br /> <br />