Panels applied directly to framing Nail size (common or galvanized box) Nail spacing at panel edges, in 6 4 3 2c Panels applied over /2-in or /8-in gypsum sheathing Nail size (common or galvanized box) Nail spacing at panel edges, in 6 4 3 2c FIGURE 10.10 Foundation anchor for a wood shear wall. TABLE 10.24 Maximum Uniform Roof Live Loads, psf,a for APA Rated Sheathingb and APA Rated Sturd-I-Floor (Long dimension perpendicular to supports)c (a) APA Rated Sheathingb Panel span rating Minimum panel thickness, in Maximum span, in With edge supportd Without edge support Spacing of supports, in, c to c 24/0 3/8 24 20e 190 100 60 30 (b) APA Rated Sturd-I-Floor Stud spacing, in Minimum panel thickness, in Maximum span, in With edge support Without edge support Spacing of supports, in, c to c 16 oc 19/32, 5/8 24 24 185 100 65 40 20 oc 19/32, 5/8 32 32 270 150 100 60 30 24 oc 23/32, 3/4 40 36 240 160 100 50 30 25 32 oc 7/8 48 40 295 185 100 60 40 48 oc 13/32, 11/8 60 48 290 160 100 65 40 aMaximum loads include an assumed 10 psf for dead load. b Includes APA Rated Sheathing Ceiling Deck. c Applies to panels 24 in or more wide. d Edge support is provided by such means as tongue-and-groove edges, panel edge clips (generally one midway between each support but two equally spaced between supports that are 48 in c to c), or lumber or

It is important to recognize that bricks from different manufacturers and manufactured in different plants give different results. To allow for these differences Austral Bricks test each states products separately. As such, the results provided by Austral Bricks are specific only to the state in which they were tested and are not transferrable to products manufactured outside that state or to another companys products. Direct fixing of plasterboard to single skin masonry walls reduces the acoustic performance of the walls. Plasterboard needs to be fixed on resilient mounted furring channels or on a separated stud wall on one side of the wall, to avoid deterioration of the Rw rating. Rendering one or both sides of a wall increases the Rw rating primarily because the render seals the fine pores in the brickwork and eliminates partially filled mortar joints. In addition, a layer of 13mm render increases the mass of thewall thereby increasing the acoustic performance. The application of a layer of 13mm render to one side of the wall is predicted to give an increase of 1 in the overall

and not less than 5 in. For n  2.0, the thickness should not be less than L (0.8  /200,000) n y h
(9.69) and not less than 3.5 in. where Ln
clear span in long direction, in. m
average value of  for all beams along panel edges 
ratio of flexural stiffness of beam section to flexural stiffness of a width of slab bounded laterally by the centerline of the adjacent panel, if any, on each side of the beam 
ratio of clear span in long direction to clear span in short direction The computed deflections of prestressed-concrete construction should not exceed the values listed in Table 9.14. A one-way reinforced-concrete slab is a flexural member that spans in one direction between supports and is reinforced for flexure only in one direction (Art. 9.52). If a slab is supported by beams or walls on four sides, but the span in the long direction is more than twice that in the short direction, most of the load will be carried in the short direction; hence, the slab can be designed as a one-way slab. One-way slabs may be solid, ribbed, or hollow. (For one-way ribbed slabs, see Arts. 9.54 to 9.58.) Hollow one-way slabs are usually precast (Art. 9.100). Castin- place, hollow one-way slabs can be constructed with fiber or cardboard-cylinder forms, inflatable forms that can be reused, or precast hollow boxes or blocks. Oneway slabs can be haunched at the supports for flexure or for shear strength. Structural strength, fire resistance, crack control, and deflections of one-way slabs must be satisfactory under service loads. Strength and Deflections. Approximate methods of frame analysis can be used with uniform loads and spans that conform to ACI 318 Building Code requirements (see Art. 9.41). Deflections can be computed as indicated in Art. 9.51, or in lieu of calculations the minimum slab thicknesses listed in Table 9.15 may be used. In Fig. 9.22 is a plot of ratios of moments of inertia of cracked to gross concrete section for one-way slabs. These curves can be used to simplify deflection calculations. Strength depends on slab thickness and reinforcement and properties of materials used. Slab thickness required for strength can be computed by treating a 1-ft width of slab as a beam (Arts. 9.45 and 9.46). Fire Resistance. One-way reinforced concrete slabs, if not protected by a fireresistant ceiling, must have a thickness that conforms to the fire-resistant rating required by the statutory building code. Table 9.17 gives minimum slab thickness for various fire-resistance ratings for normal-weight and structural-lightweightconcrete construction. Providing a minimum 3/4-in. concrete cover for reinforcement in restrained construction is adequate under the Uniform Building Code and Standard Building Code for fire-resistance ratings up to 4 hours. Reinforcement. Requirements for minimum reinforcement for crack control are summarized in Art. 9.50. Table 9.18 lists minimum reinforcement when Grade 60 bars are used. Reinforcement required for flexural strength can be computed by treating a 1-ft width of slab as a beam (Arts. 9.44 to 9.46). Rebar weights, lb / ft2 of slab area, can be estimated From Fig. 9.24a for oneway, continuous, interior spans of floor or roof slabs made of normal-weight concrete. One-way reinforced concrete slabs with spans less than 10 ft long can be reinforced with a single layer of draped welded-wire fabric for both positive and negative factored moments. These factored moments can be taken equal to wuL2 / 12, where wu is the total factored uniform load and L is the span, defined in Art. 9.41, TABLE 9.17 Minimum Slab Thickness, in, for Various Fire-Resistive Ratings