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Historic Pelham Blog Archive
May 24, 2007
350TH ANNIVERSARY CELEBRATION
BOOK: "THOMAS PELL
AND THE LEGEND OF THE PELL TREATY OAK" -- $11.95 (PROCEEDS AFTER
PRINTING COSTS WILL GO TO
BARTOW-PELL MANSION MUSEUM).
CLICK HERE TO BROWSE BEFORE YOU BUY!
LEARN MORE.
Thursday, May 24, 2007
The New Haven Line Stone Arch Above Highbrook Avenue
There is a lovely stone arch of the New Haven line beneath which
Highbrook Avenue passes in the Village of Pelham. In 1908 the Cyclopedia
of Civil Engineering published information about the stone arch, as well
as a schematic explaining its construction. What follows is a
transcription of the text of that entry and an image of the schematic.
"448. Stone Arch. In Fig. 236 is shown a stone arch on the New York, New
Haven & Hartford Railroad at Pelhamville, N. Y. This arch was constructed
over a highway, and the length of its axis is sufficient for four overhead
tracks. The span is 40 feet, and the rise is 10 feet above the springing
line, the latter being 7 feet 6 inches above the roadway. The arch is a
five-centered arch, the intrados corresponding closely to an ellipse, the
greatest variation from a true ellipse being 1 inch. The theoretical line
of pressure is well within the middle third, with the full dead load and
partial live load, until the short radius is reached, where it passes to
the outer edge of the ring-stone, and thence down through the abutment.
There is a joint at the points where the radii change, to simplify the
construction.
The stone is a gneiss found near Yokers, N. Y., except the keystone, which
is Connecticut granite, and the coping, which is bluestone from Palatine
Bridge, N. Y."
Source: Turneaure, Frederick E., ed., Cyclopedia of Civil Engineering,
Vol. IV, pp. 448-49 (Chicago, IL: American Technical Society 1908).
Please Visit the
Historic Pelham
Web Site
Located at
http://www.historicpelham.com/
Click here to see a
single index of all Historic Pelham Blog Postings to date.
posted by Blake A. Bell @
4:43 AM
Comment
Click Here To View the Actual Blog
Posting for May 24, 2007.
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