D1.F.3 Design Parameters
Parameter Name | Default Value | Description |
---|---|---|
BDY | 1.0 | Column stiffness reduction factor
for bending about the local Y axis.
Note: Not used if parameter
MMAG > 0
Note: Only used with ACI 318-11 and ACI
318-14.
|
BDZ | 1.0 | Column stiffness reduction factor
for bending about the local Z axis.
Note: Not used if parameter
MMAG > 0
Note: Only used with ACI 318-11 and ACI
318-14.
|
BRDO | 0 | Bottom Rebar Detail Options
Note: Only used with ACI 318-14.
|
CLB |
1.5 in. (38 mm) for members* |
Minimum cover from the base of the section to the bottom longitudinal reinforcement. |
CLS | 1.5 in. (38 mm)* | Minimum cover from the sides of the section to the side longitudinal reinforcement. |
CLT |
1.5 in. (38 mm) for members* |
Minimum cover from the top of the section to the top longitudinal reinforcement. |
CRDO | 0 | Design options for main
reinforcement in columns
Note: Only used with ACI 318-14.
|
FC | 4,000 psi (28 N/mm2)* | Compressive strength of concrete. |
FYMAIN | 60,000 psi (420 N/mm2)* | Yield stress for main longitudinal reinforcing steel. |
FYSEC | 60,000 psi (420 N/mm2)* | Yield stress for transverse reinforcing steel. |
LATR | 0 (No) | Is this member subject to lateral
loading?
Note: Only used with ACI 318-14.
|
LWF | 0 | Specifies the aggregate
composition of the concrete.
|
MAXMAIN | #18 (Imperial), 57M (Metric) |
Maximum size of reinforcing bar to be used for longitudinal reinforcement. Note: When using ACI
318-14, the maximum size used in specific positions can be individually set.
See detailing parameters below.
|
MIMB | #4 (Imperial), 13M (Metric) | Minimum main rebar number (size) at
the bottom face
Note: Only used with ACI 318-14.
|
MIMS | #4 (Imperial), 13M(Metric) | Minimum main rebar number (size)
at for skin (side) bars
Note: Only used with ACI 318-14.
|
MIMT | #4 (Imperial), 13M (Metric) | Minimum main rebar number (size)
at the top face
Note: Only used with ACI 318-14.
|
MINMAIN | #4 (Imperial), 13M (Metric) |
Minimum size of reinforcing bar to be used for longitudinal reinforcement. Note: When using ACI
318-14, the minimum size used in specific positions can be individually set.
See detailing parameters below.
|
MINSEC | #4 (Imperial), 13M (Metric) | Minimum size of reinforcing bar to be used for transverse reinforcement. |
MMAG | 1.0 | Factor to magnify the analysis
moments used for column design.
Note: For ACI
318-14, if this is set to 0, then the moments for the local Y and Z axis will
be calculated independently using the parameters
BDY and
BDZ .
|
MXMB | #18 (Imperial), 57M (Metric) | Maximum main rebar number (size)
at the bottom face
Note: Only used with ACI 318-14.
|
MXMS | #18 (Imperial), 57M (Metric) | Maximum main rebar number (size)
for skin (side faces) bars
Note: Only used with ACI 318-14.
|
MXMT | #18 (Imperial), 57M (Metric) | Maximum main rebar number (size) at
the top face
Note: Only used with ACI 318-14.
|
RCOAT | 0 | Rebar coating type:
Note: Only used with ACI 318-14.
|
REINF | 0 |
Column transverse reinforcement type.
|
RHOMIN | 0.01 | Minimum reinforcement required in a
concrete column. Enter a value between 0.0 and 0.08, where 0.08 = 8%
reinforcement; the maximum allowed by the ACI code.
Note: This parameter is not used with ACI 318-14.
|
SKY | 1.0 | Effective length factor for moment
magnification procedure calculations for columns, in the local Y
direction. When the SWY parameter is 0 (i.e., not
braced), then SKY ≥ 1.0. When
SWY is 1 (i.e., braced), then 0.5 ≤ SKY ≤ 1.0. Note: Only used with ACI 318-11 and ACI
318-14.
|
SKZ | 1.0 | Effective length factor for moment
magnification procedure calculations for columns, in the local Z
direction. When the SWY parameter is 0 (i.e., not
braced), then SKZ ≥ 1.0. When
SWY is 1 (i.e., braced), then 0.5 ≤ SKZ ≤ 1.0. Note: Only used with ACI 318-11 and ACI
318-14.
|
SLY | n/a |
Number of the load case that applies sidesway load in the local Y axis for column design. The moments from this case are used to magnify the
local Y axis moments for all design load cases as per the sway or non sway
requirements. Calculations are dependent on the
Note: This parameter
is not used if
MMAG has been specified.
Note: Only used with ACI 318-11 and ACI
318-14.
|
SLZ | n/a |
Number of the load case that applies sidesway load in the local z axis for column design. The moments from this case are used to magnify the
local Z axis moments for all design load cases as per the sway or non sway
requirements. Calculations are dependent on the
Note: This parameter
is not used if
MMAG has been specified.
Note: Only used with ACI 318-11 and ACI
318-14.
|
SQY | 0.2 |
Stability index, Q, in the local Y axis as defined in ACI 318 section 6.6.4.3(b). Note: Only used with ACI 318-11 and ACI
318-14.
|
SQZ | 0.2 |
Stability index, Q, in the local Z axis as defined in ACI 318 section 6.6.4.3(b). Note: Only used with ACI 318-11 and ACI
318-14.
|
SWY | 0 |
Braced against sidesway:
Note: Use only when
MMAG parameter is equal 0.
Note: Only used with ACI 318-11 and ACI
318-14.
|
TRACK | 0.0 |
Output detail
Note: The
TAKE OFF command
cannot be used in conjunction with TRACK 0 for
ACI 318-14. |
TRDO | 0 | Top Rebar Detail Options
|
TRN | 0 | Specifies whether a member is
subject to transverse loads between supports. This parameter influences the
moment magnification calculations per CL 6.6.4.5.3.
|
Notes
- The value used
when specifying the
CLS
parameter for column design is taken to be the clear cover for the longitudinal bars in a column. It is not taken as the clear cover for the tie bars. Therefore, the distance from the edge of the column to the centerline of the first row of longitudinal bars isCLS
plus half the diameter of the main bar. - The following parameters
are not applicable to the ACI 318-14 (only to ACI 318-11 and earlier):
- DEPTH
- EFACE
- RHOMAIN
- SFACE
- WIDTH
- NSECTION
Note: In ACI 318-14, members are always designed with five sections. The parameterNSECTION
used with older editions of the code has no effect. -
MAXMAIN
andMINMAIN
are now supplemented by new set of parameters likeMXMB
,MIMC
etc. You can assign values either in the old parameters (likeMAXMAIN
) or in the new parameters (likeMXMT
,MXMB
,MXMC
). If you choose to use older parameters likeMAXMAIN
andMINMAIN
, the program will store this input into newer parameters likeMXMB
,MIMC
etc. internally. However, if you use both older and newer parameters, only the newer parameter values are accepted by the program.