Click here to load reader

isolated footing

  • View

  • Download

Embed Size (px)



Text of isolated footing


This Powerpoint Presentation Was Prepared By Team 2: 1) JANARDAN 2) ADNAN

Footings must be designed to prevent bearing failure, sliding and overturning Footings must be designed to prevent excessive settlement or tilting Typically, bottom of footing must be located below frost line Excavation may be required to reach a depth where satisfactory bearing material is located

Isolated footings are provided under each column and may be square, rectangular, or circular in plan. Footing may be flat or tapered.

Isolated footingsAn isolated footing is used to support the load on a single column.It is usually either square or rectangular in plan. It represents the simplest, most economical type and most widely used footing.

Isolated footingsIn case of property line restrictions, footings may be designed for eccentric loading or combined footing is used as an alternative to isolated footing

Types of isolated footings1.Isolated square footing

2.Isolated rectangular footing3.Isolated trapezoidal footing

Isolated or single column square footing loads relatively light and columns not closely spaced Maximum steel spacing may not exceed three times the footing thickness or 18 in.

Square footings are more econonical than rectangular footings Long direction steel is uniformly distributed along short direction

Short direction steel is non uniformly distributed along long direction

Isolated Rectangular Footings

Isolated Trapezoidal FootingThis type of combined footing, shown in Figure 2, is sometimes used as an isolated spread foundation for a column that is required to carry a large load in a tight space.The size of the trapezoidal footing that will generate a uniform pressure on the soil.

Isolated Trapezoidal Footing

Thank u