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

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

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.

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.

The first was brought up just above the sidewalk and formed the bench for the high-tension ducts; the second carried the wall up to the springing line.

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.