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actual precast units. Replacement of existing sandstone is scheduled to begin in FY 1983 ($1,000,000). An estimated $1,800,000 will be required in FY 1984 to complete this project. 

The facade, roof, and terrace of the Air and Space Museum require a variety of repairs and improvements in order to eliminate water leaks and moisture problems that have developed since the building was completed in 1975. In FY 1981, a study was initiated to determine the best means of correcting these deficiencies. The first repair phase is expected to begin in FY 1982 with funds appropriated in FY 1981. An amount of $200,000 is included in the FY 1983 budget request for window, wall and skylight repairs, and some additional funding will be requested in future year budgets to continue this project. 

Additional projects scheduled during the planning period include completion of the present facade recaulking project at the American History Building and later replacing its roof, repointing of the Natural History Building facade, repair of the Cooper-Hewitt's Miller House facade, and window repairs and replacements at the Renwick Gallery and the Natural History and Smithsonian Buildings. A total requirement of approximately $14,795,000 is anticipated for this planning period. 

[[underlined]] Fire Detection and Suppression Systems [[/underlined]]. The Institution is continuing to develop and implement plans for upgrading fire protection systems in all buildings in order to provide a level of safety consistent with today's standards and technology. Work in this category includes such items as the installation of heat and smoke detection systems, sprinkler and chemical suppression systems, and fire doors and walls. Improved systems are installed as exhibitions are changed, and fire retardant materials are used wherever possible.

The implementation of comprehensive fire protection master plans is in progress at both the Museum of Natural History and the Museum of American History. Construction includes the installation of upgraded sprinkler systems, new detection systems, fire pumps, generators and control panels, and architectural modifications to create more efficient fire zones. A total requirement of approximately $5,675,000 is anticipated for this planning period, of which about $3,600,000 will be required for the Museums of Natural History and American History. Other major fire protection projects planned for the next five years include the installation of additional smoke detectors in the Smithsonian Institution Building, and the installation of a sprinkler system at the Freer Gallery, the American Art Museum and the Portrait Gallery in addition to several buildings at the Garber facility at Suitland. Plans also include the implementation of a fire protection system for Barro Colorado Island in Panama, upgrading of smoke detectors and sprinklers in the Arts and Industries Building, and completion of a fire protection system at the Chesapeake Bay Center.

[[underlined]] Access for the Disabled, Safety and Security, and Correction of Hazardous Conditions [[/underlined]].  Substantial progress has been achieved in eliminating architectural barriers at Smithsonian buildings. Modifications to the