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. � • � � ' • Provide Exterior or Exposure 1 grade. Panels shall be continuous over two or more spans, and long dimension of panel shall be perpendicular to supports. Fasten roof sheathing with 8d nails (.131" diameter x 2 1/2") spaced at 4"o.c. at supported edges and 8"o.c. at intermediate supports. Leave an 1/8"gap at all end and edge joints to allow for expansion. Design of roof sheathing assumes that the roof will be properly insulated and ventilated. Refer to APA publication N335N "Proper Installation of APA Rated Sheathing for Roof Applications." FLOOR SHEATHING Floor sheathing shall be minimum 23/32"thick tongue and groove APA rated panels, rated for spacing of supporting members. A minimum of 48/24 span rating is recommended. Provide Exposure 1 grade. Panels shall be continuous over two or more spans, and long dimension of panel shall be perpendicular to supports. Fasten sheathing with construction adhesive and 10d nails(.148"diameter x 3")spaced at 4"o.c. at supported edges and 8"o.c. at intermediate supports. LVL WOOD MEMBERS LVL members noted on drawings are engineered laminated veneer lumber as manufactured by the iLevel -Weyerhaeuser Company. Alternate at contractor's option of equal design properties. Sizes shown on plan are actual size. CHIMNEY FRAMING At chimney's higher than 3' measured from top of wood framing to top of highest contacting roof deck elevation,the following general guidelines apply: Frame with continuous 2 x 4 material from the top of the chimney to attic floor. For discontinuous walls, provide triple plates bolted together at corners and Ca� 32"oc with sheathing butted at center plate. Provide (2) plates at top of chimney, lap these plates at corners. Brace laterally at roof top and bottom chords with blocking and strapping to adjacent trusses at each side of chimney for support in all directions. Sheath all sides full height with 5/8"plywood blocked at joints ar�d nailed with 6:12 nailing pattern. Notes represent a guideline only, on-site determination of exact blocking and framing systems to be determined by the contractor. PRECAST CONCRETE UNITS The design of all precast concrete units shall conform to ACI 318. Submit complete shop drawings to architect for approval,showing the erection plan, all bearing conditions, and anchorage details. Prestressed units to sustain the loads indicated in addition to alt other dead loads. Plank supplier shall design plank to support additional dead load from, but not limited to piping, ductwork, etc.. Coordinate with mechanical/electrical as required. Precast concrete walls shall be anchored to the foundation and to each other. The precast designer shall design the connections for fastening precast units to foundations, to each other, and to other supporting members. Floor plank shall be prestressed hollow-core slabs,proportioned for the loads noted on the drawings. Upon installation, plank shall be essentially past the effects of deformation due to creep and shall have camber not over 1/360 of the span. Such camber shall be uniform from plank to plank. All headers at openings in precast concrete shall be furnished by precast suppliers. Place mechanical openings not shown on plans between webs in precast concrete plank units. Do not drill holes into precast concrete plank without prior approval from plank supplier. Wet the surface of the precast plank to surface saturated dry condition and broom in portland cement slurry immediately prior to casting topping slab. A properly applied bonding agent is acceptable in lieu of the wet slurry provided it is installed in strict accordance to manufacturer's instruction. Appendix A,Highwood Road Residence,23Jan2013,MMY#: 13042.00,APG Page 6