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20.. Porches, balconies or raised <br /> floor surfaces located more <br /> than 30 in. above the floor or <br /> grade shall have guardrails not <br /> less than 3 6~ in. in <br /> Required guardrails' shall have <br /> intermediate rails or ornamen- <br /> tal closures which will not <br /> allow passage of an object 6 <br /> in. or 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 />immediate 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 need be installed only <br />on the upper level, provided <br />the lower level is less than <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 construct'ion, required <br />smoke detectors shall receive <br />their primary power from the <br />building wi'ring. Smoke detec- <br />tors may be battery operated <br />when installed in existing <br />buildings. R-215.2 <br /> <br />23. <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 vents, pipes, ducts, <br />chimneys and fireplaces at <br />ceiling and floor spaces. R- <br />402.7 <br /> <br />24. 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. <br /> 402.9 <br /> <br />25. <br /> <br />The area within the foundation <br />walls shall have all vegeta- <br />tion, top soil and foreign <br />material removed. R-603.2 <br /> <br />Rafters shall b'e nailed to <br />ceiling joists to form a con- <br />tinuous tie between exteriQr <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 />Ridge board shall be at least 1 <br />inch nominal thickness and not <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 Dot less <br />than 2 in. nominal thickness <br />end not less in depth than the <br />cut end of the rafter. R-702.2 <br /> <br />When the roof pitch ~s less <br />than 3 in 12, members support- <br />ins rafters and ceiling joist. <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. Trus.s members shall <br />not be cut or altered unless <br />so designed. R-702.9 <br /> <br />All plywood, when designed to <br />be exposed in outdoor applica- <br />tions shal'l be of an exterior <br />type, except that plywood roof <br />sheathing exposed to the <br />underside may be of inter,or <br />type with exterior glue. R- <br />703.1 <br /> <br />32. <br /> <br />33. <br /> <br />Provide screened attic vents <br />with a net free area of 1/150 <br />of the attic area (or 1/300 if <br />half is along eaves and the <br />other half in the upper <br />portion). R-707 <br /> <br />A readily accessible attic <br />access framed opening not less <br />than 22 in. by 30 in. shall be <br />provided. R-708 <br /> <br />Fireplace and chimney con.- <br />structlon shall conform .to <br />chapter 9. <br /> <br />34. <br /> <br />INSULATION REQUIREMENTS: <br />Buildings with high-efficiency <br />heating equipment shall be <br />insulated as follow: ceiling <br />R-30 (roof/ceiling assemblies <br />in which has a slope of 3 in <br />12 or greater, may be R-19), <br />walls R~ll, underfloors R-19, <br />other heating ~ystems, ceiling <br />R-38 (vaulted ceiling R-19) <br />walls R-19 and under floor <br />19. <br /> <br />35. Elements of appliances which <br /> create a glow, spark or flame <br /> shall be located a min. of 18 <br /> in. above garage floor. ~- <br /> 1114 <br /> <br /> 6. Appliances subject to mechani- <br /> cal damage shall be guarded by <br /> a protective barrier. H-1114 <br /> <br /> <br />