NEW YORK, Oct. 13 (AP)ÛÓThe stock market was undeterred by semiholiday conditions prevailing in observance of Columbus Day and climbed to another record peak today in heavy trading.</br></br>heading issues were up fractions to well over a point, holding the best of their gains despite some fast profit taking in the final minutes.</br></br>Volume was 4,550,000 shares, close to FridayÛªs 4,610,000 which was the yearÛªs biggest. A million shares changed hands in a turbulent first hour for the biggest opening hour since Jan. 16 when 1,264,280 shares were traded.</br></br>Because banks and many other business establishments were closed a dull session was anticipated. Ideas changed when huge blocks began to cross the tape from the start.</br></br>Confidence was bolstered by weekend reports of sharply increasing steel production and expectations of a further boost in copper prices at the custom smelter level. During the day steel production was reported at another 1958 high.