CHAPTER 4 REINFORCED CONCRETE BUILDING CONSTRUCTION GENERAL Reinforced concrete building construction usually consists of roof and Ooor systems supported by bearing walls and columns. Columns and walls are supp Qrted by found. ltion, of V>1ryi D11 typ<s; each particularly soiled to the soil conditions. It will be helpful lo have a geneo1l knowledge of the dilfereot members that moy be a part of each building. Not all of these are found in every buildll J3. The Arehitect or F. ntineer choo. c;e~ th Me members which work out best for a particular building, from the Slllndpoints of strength and economy. The more commonly used members arc briefly described in Ibis chpu;r. In actual J>12C­ ti~ many wriations ar~ used. WALLS AND WALL FOOTINGS A bea. cicg wall is supponed b a continuous wall footing, which is usua:Jy twk~ ;i:, wide:; as the thickness of the wall but wider+ if necessary, to :..,xcad tho load from the wall 10 ~,c bearing soil. foundation w11lls = olso used.. reraining walls to withstand earth pressure for oonstruction belo..v ground. When poor soil bearing conditions make it necessary, wall footings may be supported by piles ot caissons IO support the load further down to firm ooil or bed roclc. Figure 4-1 shows a typical wall footing. Plac■,g Reinforcing Bart-10th Edition 4-1 Section 609 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 6-9