The Fine Arts Commission yesterday unanimously approved a revised design for the Holocaust Memorial Museum.

The next, and final, step for the memorial museum will be a hearing by the National Capital Planning Commission this summer, "probably in August," said Arthur Rosenblatt, director of the museum. Should the NCPC approve the proposal, as Rosenblatt believes is likely, construction of the building could begin by late fall and an opening could take place in three years.

The new design is a mirror image of the one rejected by the Fine Arts Commission last month, but it is smaller and the hexagonal "Hall of Remembrance," which projects from the building's west fac ade, has been pushed back about 35 feet. As a result, the building would be very nearly on line with the long fac ade of the Bureau of Engraving and Printing on Raoul Wallenberg Place SW (formerly 15th Street).

"This is a very serious and real response to the concerns expressed by the commission," Rosenblatt said. "Overall, we've reduced the size of the building by about 10 percent in order to accommodate these concerns. We think it's a better building." The prominent, exposed placement of the Hall of Remembrance was strongly objected to at last month's meeting.

Architect James I. Freed, a partner in the New York firm of I.M. Pei and Partners, made several additional, subtle adjustments in the design. Cornice lines on the limestone-clad Hall of Remembrance, for instance, were enlarged to emphasize the building's placement next to the Bureau of Engraving and Printing, and a large window on the west fac ade, formerly angled to frame a view of the nearby Washington Monument, was reoriented to deemphasize the view.

Although the building's size has been reduced by about 26,000 square feet, Rosenblatt said the museum's programs will not be affected. "Most of the reductions came in public circulation areas," he said, "and the size of the exhibition halls, auditoriums and assembly spaces remains about the same." The $50 million, privately financed building, with four floors open to the public, one for offices and two levels of underground parking, will have 224,000 square feet of floor space.

The yet-to-be-designed permanent exhibition, occupying 40,000 square feet (the equivalent of the exhibition spaces in the East Building of the National Gallery of Art), "will focus on the six million Jews ... exterminated in the Holocaust and the millions of other victims of Nazism, including Poles, Gypsies, Soviet citizens, the handicapped, and others," according to a museum statement.

Several citizens voiced concern about the memorial museum at yesterday's meeting. Gerda Bikales, who identified herself as a Holocaust survivor, said that the proposal was "conceptually flawed ... The Holocaust experience is not central to the American national experience {and} is not translatable into concrete structures of brick and stone."

Commission Chairman J. Carter Brown responded that the commission's mandate was simply "to comment on the design" of an institution created by Congress.