springing line

American  

noun

Architecture.

1. a horizontal line between the springs of an arch or dome.

2. the rise or the angle of the rise of an arch.

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Example Sentences

See Examples For:

springing line

The side walls were concreted to the springing line and then the five-ring brick roof arches were constructed on traveling centers and in 20-ft. sections.

From Concrete Construction Methods and Costs by Gillette, Halbert Powers

The concrete for the portion of the pier above springing line and for the lower portions of the haunches was dumped direct from the cars.

From Concrete Construction Methods and Costs by Gillette, Halbert Powers

Before this mortar had set, concrete was rammed in between it and the sheeting to a height of 18 ins. above the springing line, and then the remainder of the concrete placed without outside forms.

From Concrete Construction Methods and Costs by Gillette, Halbert Powers

These joints in the arch were not allowed to be made above a point 60° above the springing line.

From Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910 The Bergen Hill Tunnels. Paper No. 1154 by Lavis, F.

A concrete-mixing plant was placed in each shaft, the mixer being located high enough to discharge into cars at about the level of the springing line of the arch.

From Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The Cross-Town Tunnels. Paper No. 1158 by Brace, James H.