mortar mix. accordance with its respective durability. Durability requirements are stipulated for each combination of To ensure adequate serviceability, AS 3700 requires a environment and location. structure to have the necessary durability to withstand the expected wear and deterioration throughout the The exposure environments referred to in Table 5.1 of intended life typically 50 years, without the need for AS 3700 are as follows: Table 1 Exposure Environments Severe marine Up to 100 metres from a non-surf coast and up to 1 km from a surf coast. The coast is defined as the mean high-water mark. Marine Between 100 metres and 1 km from a nonsurf coast and between 1 kilometre and 10 kilometres from a surf coast. As before, the coast is defined as the mean high-water mark. Industrial Within 1 km of major industrial complexes producing significant acidic pollution. Moderate Areas within 50 km of the coast and more than 1 km from a non-surf coast, or 10 km from a surf coast. These are considered to be subject to light industrial pollution and/or very light marine influence.

The impact insulation (or isolation) provided by floor-ceiling assemblies is usually expressed as their impact noise rating (INR) or impact insulation (IIC). Like STC, INR and IIC values are obtained by comparing the curve of the sound spectrum obtained in a test with a standard contour (except that for INR and IIC the sound pressure level is measured in the room below the noise source). The entire procedure is controversial and far from widely accepted; but its use is so widespread that designers and builders should be aware of it. (See ASTM RM 14-4.) Table 11.29 lists the impact isolation provided by several types of construction. Note particularly the enormous effect of certain floor coverings on the performance of the construction. (While IIC values are shown in Table 11.29, they can be converted to INR values by subtracting 51 points; for example, IIC 60  INR 9, and IIC 45  INR 6, etc.) TABLE 11.29 IIC of Various Floor Constructions Construction IIC Oak flooring on 1/2-in plywood subfloor, 2
10 joists, 1/2-in gypsum board

Recommended mounting heights for hardware for swinging doors are shown in Fig. 11.63. For specific installations, refer to hardware templates supplied by door manufacturers. Hand of Doors. The direction of swing, or hand, of each door must be known and specified in ordering such hardware as latches, locks, closers, and panic hardware, because the hand determines the type of operation required of them. The hand is determined with respect to the outside or key, or locking, side, following the conventions illustrated in Fig. 11.64. FIGURE 11.63 Recommended mounting heights for hardware for ordinary swinging doors. FIGURE 11.64 Swing of doors. KS indicates key, or locking, side. Weatherstripping. To weatherproof the joint between the bottom of an exterior door and the threshold, a weatherstrip in the form of a hooked length of metal often is attached to the underside of the door. When the door is closed, the weatherstrip locks into the threshold to seal out water. Other types of weatherstripping, including plastic gaskets, generally are used for steel doors and may be installed FIGURE 11.66 Vertically sliding door: (a) vertical section through the opening; (b) elevation of the door. on header and jambs (Recommended Weatherstripping for Standard Steel Doors and Frames, SDI 111-E, Steel Door Institute, 30200 Detroit Rd., Cleveland, OH FIGURE 11.65 Horizontally sliding door: (a) horizontal section through the opening; (b) vertical section through the opening. 11.54.4 Ordinary Horizontally