Structural Detailing of Reinforcement for Economy - Simplified Design of Reinforced Concrete Buildings - page 248

Start 1st bar @ column centerline (if uniformly spaced bar is on centerline,
start additional bars @ 3" on each side). Provide 3" min. spacing from
uniformly spaced bars (if possible).

0.3 ˜ n

(8 + 3) #4

Design Drawing

Notes: (1) Maximum spacings s = 2 x slab thickness 18 in. (ACI 13.3.2)

(2) Where additional top bars are required, show the total number of bars
on the design drawing as (8 + 3) #4 where 8 indicates the number of
uniformly spaced bars and 3 indicates the number of additional bars.

≤

Figure 8-7 Example of a Typical Detail for Top Bars at Edge Columns (Flat Plate)

Start 1st additional bar @ 6" from edge. Space
remainder @ 3" (if possible). Provide 3" min. spacing
from uniformly spaced bars (if possible).

0.3 ˜ n

(5 + 3) #4

Start 1st bar @ 3" from edge.
Space remainder @ s.

Design Drawing

Figure 8-8 Example of a Typical Detail for Top Bars at Corner Columns (Flat Plate)