Rep. Jim Hansen, R-Utah, said Thursday he voted against the House's defense authorization bill because it contained cuts of $836 million in President Reagan's Strategic Defense Initiative and $242 million in the MX mobile missile program.

The measure also cut the binary nerve gas program, Hansen said.The binary gas program would have allowed destruction of existing nerve gas now stored at Tooele Army Depot.

Calling the vote a "tough choice," Hansen said he supported provisions of the bill that would increase military pay 4.1 percent and funded $126 million in military construction at Hill Air Force Base and other bases in Utah.

Hansen voted for a House conference report on the trade bill, calling it an improvement on the version vetoed by Reagan.

He said the measure "abandons the path of protectionism and puts us on the correct road to free and open markets."