Laserfiche WebLink
/V)9 <br />J2 7� <br />common air return is installed in the <br />corridor outside the dwelling units. The <br />e.ntrance doorways of all. apartment units <br />must then he undercut to permit the venting <br />Vf the return air. Obviously, the privacy <br />between adjacent apartaients is seriously <br />breached in such cases. <br />Tile only remedy the tenant himself has <br />is to close the gap at the bottom of each <br />door in his dwelling with a threshold plate <br />.equipped with a tubular gasket. He must <br />then.install in the wall or ceiling of each <br />room an acoustically lined air -transfer duct <br />to vent the air into the adjacent hall or <br />corridor. Both door thresholds and <br />air -transfer ducts are commercially <br />available. Techniques for sealing door <br />thresholds and installing air -transfer ducts <br />are discussed in Chapter 4 and illustrated <br />in Figures 4-7 and 4-12, respectively. <br />Although the intrusion of outdoor noise <br />prevalent in dwellings in urban <br />ations, it can occur in dwellings in <br />`� ., 113: ', ' �1T._-•� <br />:a. -rte. _a � r �`�e�-•7— <br />Avoid building sites at intersec• <br />tions of major trdflic arteries. <br />Such sites are extremely noisy <br />due to accelerating, decelerating, <br />and braking vehicles. <br />fit <br />�f• �Ir <br />ZvI��.,.. <br />Building sites in open areas are <br />less noisy than sites in congested <br />building areas. <br />supposedly quiet suburban and even rural <br />areas,. While an occasional jet aircraft <br />flyover or a passing truck may cause some <br />disturbance in such areas, many problems <br />arise from a neighbor's air conditioning <br />unit, barking dogs or bird calls. If the <br />intrusion of such noise is bothersome to <br />you, give preference to buildings that have <br />fixed or well -sealed windows that are <br />thermally insulated or feature double -pane <br />construction. Buildings with' single pane <br />windows protected by well -fitted storm <br />windows *also would provide an adequate <br />degree of insulation against such noise. <br />The intrusion of outdoor noise may ho <br />minimized even further by observing the <br />following suggestions relative to selecting <br />the building site. <br />(a) Avoid building sites that front on <br />main traffic arteries or bit!; <br />routes. Early morning traffic <br />noise mzy be a source of <br />annoyance, as illustrated in Fig. <br />6-2. <br />Avoid building sites on the ere•.ts <br />of hilly traffic arteries. Such <br />sites are very noisy due to luw <br />gear acceleration noise. <br />4 ft <br />r• <br />lrallic arterles between uill <br />huildinps are quite noisy. Avoid <br />building sites opl,osite tall build <br />_ ings in such cases. <br />w� Y' WIND Miff tink _%. ' <br />iIr <br />rk <br />Avoid hollows or depressions. <br />They are generally noisier than Upwind building site is less noisy <br />flat open land. <br />,r ' than a downwind site. <br />Al -r .H r A' n v • 'r. 11 Al <br />F'Ig. 6 2. r XAN1111 f S OF ATARI MFNT SI tES TIIAT SH0111 f► 10 AVOlDrD <br />®,I <br />