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or special knowledge or effort. <br /> <br />Exceptions: <br />1. Key operation is permitted from a dwelling unit provided the key cannot <br />be removed from the lock when the door is locked from the side from <br />which egress is to be made. <br />2. Locking devices conforming to Section 409.3.2 shall be permitted in <br />buildings of use group 1-2. <br />3. Locks conforming to Section 410.4 shall be permitted in buildings of <br />use group 1-3. <br />4. Means of egress doors from individual dwelling units and guest rooms <br />of Use Group R having an occupant load of ten (10) or less are permitted <br />to be equipped with a night latch, dead bolt. <br />5. Special locking arrangements conforming to Section 1017.4.1.2 or <br />Section 1017.4.1.3. <br />6. In occupancies of Use Groups B, F, M and S, the main exterior means <br />of egress door is permitted to be equipped with a key-operated locking <br />device from the egress side where in compliance with the following three <br />conditions: <br /> a. The locking device is of a type that is readily distinguishable as <br /> locked. <br /> b. A readily visible, durable sign is posted on the egress side on or <br /> adjacent to the door stating "This Door To Remain Unlocked When <br /> This Building Occupied". The sign shall be in letters not less than 1 <br /> inch(25 mm) high on a contrasting background. <br /> c. The main entrance door is a single door or a pair of doors which, <br /> when unlocked, the door or both leafs of a pair of doors swing free. <br />7. Locking arrangements conforming to Section 1017.4.5. <br />8. In any existing building, key operation is permitted from a dwelling unit <br />provided the existing dwelling unit means of egress door contains a glass <br />panel or is located immediately adjacent to an existing window or fixed <br />glass panel. <br /> <br />( CHAPTER 13 ENERGY CONSERVATION ) <br /> (SECTION 1301.0 GENERAL) <br /> <br />1301.3 Design conditions: The basic design parameters for heating and cooling systems <br />shall be as follows: <br /> Heating Degree Days: 5000 <br /> Latitude: 38o-40' North <br /> Solar Factor Value: 126 BTU/H/Ft. <br /> <br />Outside Temperature <br />Winter (db) 0°F (-18°C) <br />Summer (db) 95°F (35°C) <br />Summer (wb) 75°F (24°C) <br /> <br />Inside Temperature <br />Winter (db) 70°F (21°C) <br />Summer (db) 75°F (24°C) <br /> <br />-11- <br /> <br /> <br />