172 Section 4 Reading Prints
Footings are also required under columns.
These footings frequently are wider and thicker
than footings for foundation walls, because the
column loads are concentrated in one spot. See
Figure 10-2. Fireplace chimneys and similar con-
centrations of weight also require larger footings.
Footings are located using strings attached to
batter boards set back from the excavation. The
footings can be trenches cut into the fl oor of the
excavation, or they can rest on the excavation
fl oor. In the latter case, boards are used to form
the footing sides to the proper width and height.
Figure 10-2.
Footings for columns have a larger cross section than wall footings. A square shape is normally
used. A—Portion of a plan view drawing showing the layout for columns and footings. Note the dimensions given
for the footings. B—Section drawing showing column and footing details.
FTG. 3'-6"X3'-6"X1'-4"
W/ (4) #5 E. W. BOT.
T/FTG. = 95'-6"
FTG. 3'-6"X3'-6"X1'-4"BOT.W.E.=#5
W/ (4)
T/FTG. 95'-6"
2 2
A
B