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

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 Halbert Powers Gillette

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 James H. Brace

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 Halbert Powers Gillette

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 Halbert Powers Gillette

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 James H. Brace