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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 hr. <br /> Required guardrailS shall have <br /> intermediate rai~s or ornamen~ <br /> tel closures which will not <br /> allow passage of an object 6 <br /> in. or more in diameter. <br /> <br /> Smoke detectors shall De <br /> ins%ailed outside of each <br /> ~epara~e sleeping area in the <br /> immediate vicinity of the <br /> Bedrooms and on each additional <br /> story of the dwelling including <br /> basemenUs. 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 ~equired o~ 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 /> 2. In new construe%ion, required <br /> smoke detectors shall receive <br /> their primary power from the <br /> building wiring. Smoke <br /> tors may be battery operated <br /> %~hen installed in existing <br /> buildings. <br /> <br /> 3. 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 /> celling and floor spaces. <br /> 402.7 <br /> <br />Poundation cripple walls shall <br />be ~ramed of studs with a min. <br />length Of 14 in. or shall be <br />framed of sol~d blocking. R~ <br />4o2.9 <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 />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 th~ 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 />mole than ~ fee% on c~nter. <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 ra~ter. At all valleys <br /> and hips there shall be <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 />28. When the roof pitch is less <br /> than 3 in 12, members support- <br /> ing rafters and ceiling <br /> such as ridge beams, hips and <br /> valleys, shall be designed as <br /> beamS. <br /> <br />Wood trusses shall be designed <br />in accordance wi~h approved <br />engineering practice. Trusses <br />shall be braced according to <br />their appropriate engineered <br />design. Truss members sh~ll <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 />uions shall be of an exterior <br />type, except tha~ plywood roof <br />sheathing exposed to the <br />underside may be of interior <br />=ype with exterior glue. R- <br />703.1 <br /> <br /> Provide screened a~tic 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 />Pireplace 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-11, underfloors R~lg, <br />other heating systems, ceiling <br /> <br /> R-38 (vaulted ceiling R-19) <br /> walls R-19 and under floor <br /> 19. <br /> <br />35. ~lements 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 />36. Appliances subject to mechani- <br /> cal damage shall be guarded by <br /> a protective barrier. M-1114 <br /> <br /> <br />