File:Image from page 160 of "City roads and pavements suited to cities of moderate size." (1902) (cropped).jpg

English: Caption:

Telford road in process of construction by MASSACHUSETTS HIGHWAY COMMISSION.

Identifier: cityroadspavemen00juds Title: City roads and pavements suited to cities of moderate size. Year: 1902 (1900s) Authors: Judson, William Pierson, 1849-1925 Subjects: Streets Pavements Roads Publisher: New York : The Engineering news publishing company Contributing Library: The Library of Congress Digitizing Sponsor: The Library of Congress

View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book

Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image: lford foundation is then rolled with a steam roller often or more tons weight, until all stones are firmlybedded and none move under the roller. All depres-sions are then filled with stone chips not larger thantwo and one-half inches, and the whole left true andeven and four inches below the line of finished gradeand cross-section. A good workman will average about twenty minutesin setting a square yard of this telford foundation,which may be formed of any kind of quarried rockwhich is most available: cobble-stones are not suitable. The practice in 1901 in the states named is hereshown: Sizes of Stone for Telford Foundation, in Inches. STATE. Depth, as SET ONEDGE. Width, as SET. Length,set across ROAD. Remarks Max. Mm. Max. 4 10 10110 Min. Max. Min. jNew Tersev. Mass Conn 86 88 8 586 4 6 4 10 15 6 86 Alternate end-stones double length.Two inches gravel rolled on sub-grade as base.Macadam covering formed in one layer.Used only on unstableground as foundationfor macadam. New York .. 154

Text Appearing After Image: CITV ROADS AM) IAVIIMKNTS. The re(juir(jincnts for formin^^ the four inches or sixiiicluS of l)rokcn stone roadway upon this telfordfoundation are tlie same as for re^^ular macadani. ()f the inilea;_;e of l)r()ken-slone roads ])uilt ])y Stateaid (huin^ Kjoo, telford foundation was used for one-sixth in New Jersey, one-seventh in Coiuiecticut, onetliiity-ei^lith in Massachusetts and none in New York.During- 1901, New Jersey used tlie same ])ro|)ortion asin 1900. NEKI) OF r>INI)i;K Willi UROKKN SlONK. Macadam required that tlie layer of regular frag-ments sliould l)e s]:)read on the earth roadbed, to l^e con-sohdated ])y the wlieels of ]:)assin^ vehicles, without tlieaid of any fine material or of binder of any sort. This recjuirement was impracticable and j^robal^lycould not be enforced, and exj:)erience has shown thatit is not desirable that it should be enforced. Such fragments, loosely jailed or spread, have aboutforty-six to forty-ei^ht ])er cent of void sj)aces, and willpack by

Note About Images

Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.