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

A special set of inside forms, about 2 ft. high, extending to the springing line of the dome, was then put in, and the dome forms were set up on it.

From Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 A Concrete Water Tower, Paper No. 1173 by Kempkey, A.

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

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

To distribute the skip cars along the work a trestle was built close alongside the bridge and at about springing line level.

From Concrete Construction Methods and Costs by Gillette, Halbert Powers

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.