D1.I.1.4 Design Parameters
Design parameters are summarized in the table shown later in this section. These parameters may be used to control the design process to suit specific modeling needs. The default parameter values have been selected such that they are frequently used numbers for conventional design.
|Parameter Name||Default Value||Description|
Must be specified as ASCE to design per ASCE 10-97.
Design code to follow. See TR.48.1 Parameter Specifications.
0 = Perform design at beam ends and section locations specified according to the SECTION command
1 = Perform design at the ends and eleven intermediate sections of the beam
|0.85 for sidesway and calculated for no sidesway||Cm value in local y and z axes as defined in equation 3.12-1 on p.10 of ASCE 10-97.|
|DMAX||45.0 in.||Maximum allowable depth for member selection|
|DBL||0.75 in.||Diameter of bolt for calculation of number of bolts required and the net section factor.|
|DMIN||0.0 in.||Minimum allowable depth for member selection|
Indicates what type of end conditions are to be used from among Equations 3.7-4 thru 3.7-7 to determine the KL/R ratio.
Indicates what type of end conditions are to be used from among Equations. 3.7-8 thru 3.7-10 and 3.7-12 thru 3.7-14 to determine the KL/R ratio.
|FVB||30 KSI||Shear strength of bolt.|
|FYB||36 KSI||Yield strength of bolt.|
|FYLD||36.0 KSI||Yield Strength of steel|
|KT||1.0||Effective length coefficient for warping restraint (clause 3.14.4, p. 11)|
|KY||1.0||Effective length factor (K) for compression buckling about the Y-axis (minor axis)|
|KZ||1.0||Effective length factor (K) for compression buckling about the Z-axis (major axis)|
This parameter is meant for plain angles.
|LT||Member Length||Effective length for warping.|
|LY||Member Length||Length to calculate slenderness ratio for buckling about the Y-axis (minor axis)|
|LZ||Member Length||Length to calculate slenderness ratio for buckling about the Z-axis (major axis)|
Parameter that indicates the member type for the purpose of calculating the KL/R ratio (see clause 3.4, PAGE 3, ASCE 10-97)
|NHL||0||Number of bolt holes on the cross section that should be used to determine the net section factor for tension capacity.|
|NSF||1.0||Net section factor for tension members|
|RATIO||1.0||Permissible ratio that determines the cut off point for pass/fail status. A value below this quantity indicates PASS while a value greater than this quantity indicates FAILURE.|
0.0 = Sidesway in local y-axis
1.0 = No sidesway
|SSZ||0.0||Same as above except in local z-axis|
0.0 = Suppresses printing of allowable stresses
1.0 = Prints all allowable stresses
|UNB||Member Length||Unsupported length of the bottom flange for calculating flexural strength. Will be used only if flexural compression is on the bottom flange.|
|UNF||1.0||Same as UNL, but provided as a fraction of the member length|
Unsupported length of member for calculation of
allowable bending stress
|UNT||Member Length||Unsupported length of the top flange for calculating flexural strength. Will be used only if flexural compression is on the top flange.|