The D.C. City Council's antismoking bill was sidetracked temporarily yesterday so a committee can reconsider the proposed restraints can reconsider bacco in privately owned offices and industrial plants.

As approved April 26 by the council's committee on transportation and environmental affairs, the measure would prohibit smoking at all so-called "places of work" in Washington except in areas set aside for smokers.

Committee chairman Jerry A. Moore Jr. (R-At Large) told a legislative review meeting of the council yesterday that he wanted to send the measure back to his committee for further work. He said a delay of about three weeks is probable.One area needing work, he said, is the clause dealing with private workplaces.

Moore refused, however, to say whether he plans to stiffen or to liberalize the proposed restraint.

"The bill will be sharpened to define more explicity what is a work-place," Moore said.

Under the broadest interpretation of the bill as originally approved by the committee, smoking would be prohibited in large offices as well as factories and garages where numerous employes work in the same room.

Moore said the measure had received widespread support and little opposition, and that temporary withdrawal of the bill from consideration by the full council does not imply that the bill may be endangered.

The bill would extend the present ban on smoking in stores, elevators and schools, and would impose a ban on smoking in galleries and most public buildings, except those owned by the U.S. government. Federal installations are not subject to regulation by the D.C. government.