springing line


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Related to springing line: overarched

springing line

n.
A horizontal line between the springings of an arch.
References in periodicals archive ?
diameter concrete columns are spaced at 20 ft 3-1/2 in., supporting the non-reinforced groined arch roof with a height of 5 ft above the springing line, a cantilevered clear span of 8 ft 10-3/4 in., and a minimum 6 in.
rise of the barrel arch from the springing line, compared to the 5-ft rise of the groined arch, is necessary to meet the membrane requirement.