Manual of military engineering (1905) (14759562306)

Identifier: manualofmilitary00grea (find matches)
Title: Manual of military engineering
Year: 1905 (1900s)
Authors: Great Britain. War Office
Subjects: Military engineering
Publisher: London : Printed for H. M. Stationery off., by Harrison and sons
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive



Text Appearing Before Image:
transoms and by cross-bracing from each trestleto its neighbour (see PI. 49, Fig. 1), the nearest trestles to thebanks on either side being rigidly connected thereto by lightspars lashed to the tips of the legs and to bollards on the bank.These light spars are put on before the trestle is launched,and help to get it into position, they also serve as handrailswhen the roadway is placed. 153. PL 51. Fig. 1. shows three-legged trestles, two of whichare required for the support of a single transom ; to make them,it is best to lash two legs together by a sheer Ipshing, open themout, and then add the third leg or prypole (see Fig. 2) ; thetrestle must t en be up-ended, the feet placed on the angles ofan equilateral triangle with sides of about half the height, andthr^e light ledgers attached. The advantages of tripod trestles are that they utilise lightmaterial, will stand without bracing, and admit of more readyadjustment, raising or lowering, of the roadw^ay than either TRESTLES PLaJ^iS)
Text Appearing After Image:
s/as.s .OS. Wel(«r k Gr«h««ii. Lflf Urte^^^Oon Opposite jJC^Mf^ SO. BRIDGING EXPEDIENTS. J^i^.1.