Retaining walls; their design and construction . Fig. a.— Uncoursed ruhhle wall with coursed effect given by false pointing. Ilc. B. Uul)l)lo wall (Los AiiKelos) with face foniiod hy iiigger-h. CHAPTER IX WALLS OTHER THAN CONCRETE Plant.—Rubble and cut-stone walls up to 5 or 6 feet in heightare built of stone of such size that they are easily raised and setby hand. No special plant is therefore required and the wall isbuilt entirely by hand labor. As the walls increase in height,good construction requires the use of larger stone, to insure awall properly bonded together and it becomes necessar
Retaining walls; their design and construction . Fig. a.— Uncoursed ruhhle wall with coursed effect given by false pointing. Ilc. B. Uul)l)lo wall (Los AiiKelos) with face foniiod hy iiigger-h. CHAPTER IX WALLS OTHER THAN CONCRETE Plant.—Rubble and cut-stone walls up to 5 or 6 feet in heightare built of stone of such size that they are easily raised and setby hand. No special plant is therefore required and the wall isbuilt entirely by hand labor. As the walls increase in height,good construction requires the use of larger stone, to insure awall properly bonded together and it becomes necessary thento employ plant to raise and set the large stone. A derrick,either a guy or a stiffleg, is probably the most serviceable andefficient piece of plant to use in setting stone walls. It is op-erated by a hoist run by steam, electricity or air. A guy derrickis possibly preferable in that it permits a greater swing of theboom. It is hmited however by the fact that it requires ampleroom to anchor its guys, room not always available, especiallyin city work. A stiffleg derrick is a self contained unit, theweight of the
Size: 1976px × 1265px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidretainingwal, bookyear1920
