How does ideCAD calculate the maximum permissible deflections according to ACI 318-19?
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Permissible Calculated Deflection Limits are calculated automatically according to Table 24.2.2
Deflection calculated in accordance with “Calculation of immediate deflections” and “Calculation of time-dependent deflections” should not exceed the limits ACI 318-19 Table 24.2.2 given below.
|
Member |
Condition |
Deflection to be considered |
Deflection limitation |
|
|---|---|---|---|---|
|
Flat roofs |
Not supporting or attached nonstructural elements likely to be damaged by large deflections Immediate deflection due to L |
Immediate deflection due to maximum of Lr, S, and R |
l/180 |
|
|
Floors |
l/360 |
|
||
|
Roof or Floors |
Sıpporting or attached to nonstructural elements |
Likely to be damaged by large deflections |
That part of hte total deflection occurring after attachment of nonstructural elements, which is the sum of the time-dependent deflection due to all sustained loads and the immediate deflection due to any additional live load |
l/480 |
|
Not likely to be damaged by large deflections |
l/240 |
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