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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 36 in. in bt. <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. R- <br /> 214.2 <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 /> In new construction, required <br /> smoke detectors shall receive <br /> their primary power from the <br /> building wiring. Smoke detec- <br /> tors may be battery operated <br /> when installed in existing <br /> buildings. R-215.2 <br /> <br /> F <br /> irestopping shall be provided <br /> in the following locations: in <br /> <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. R- <br /> 402.9 <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 />26. <br /> <br />Rafters shall be nailed to <br />ceiling 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 />30. <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. R-702.2 <br /> <br />when the roof pitch is less <br />than 3 in 12, members support- <br />ing rafters and ceiling joist, <br />such as ridge beams, hips and <br />valleys, shall be designed as <br />beams. R-702.~ <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 shall <br />not be cut or altered unless <br />so designed. R-702.9 <br /> <br />Ail plywood, when designed to <br />be exposed in outdoor applica- <br />tions shall be of an exterior <br />type, except that plywood roof <br />sheathing exposed to the <br />underside may be of interior <br />type with exterior glue. <br />703.1 <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 />struction shall conform to <br />chapter 9. <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-il, underfloors R-19, <br />other heating systems, ceiling <br />R-38 (vaulted ceiling R-19) <br />walls R-19 and under floor R- <br />19. <br /> <br />Elements of appliances which <br /> <br />36. <br /> <br />create 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 mechani- <br />cal damage shall be guarded by <br />a protective barrier. M-1114 <br /> <br /> <br />