D12.A.3 Design Parameters

Design parameters communicate specific design decisions to the program. They are set to default values to begin with and may be altered to suite the particular structure.

Table 1. Design Parameters for Norwegian Steel design code
Parameter Name	Default Value	Description	Reference
CODE	none	Must be specified as either `NS3472` for NS or `NPD` for NPD (`NOR` may also be used for both). Design code to follow. See TR.48.1 Parameter Specifications.
BEAM	0.0	Parameter `BEAM 1.0 ALL` tells the program to calculate von Mises at 13 sections along each member, and up to 8 points at each section. (Depending on what kind of shape is used.) Note: Must be set to 1.0	Sec. NS 12.2.2
BY	1.0	Buckling length coefficient, β for weak axis buckling (y-y) (NOTE: BY > 0.0)	Fig. NS 3 Sec. NS 12.3
BZ	1.0	Buckling length coefficient, β, for strong axis buckling (z-z) (NOTE: BZ > 0.0)	Fig. NS 3 Sec. NS 12.3
CB	1.0	Lateral buckling coefficient, Y. Used to calculate the ideal buckling moments, M_vi	Sec. NS2 A5.5.2 Fig. NS2 A5.5.2a)-e)
CMY	1.0	Water depth in meters for hydrostatic pressure calculation for pipe members	Valid for the NPD code only
CMZ	0.49	α_LT for sections in connection with lateral buckling	Sec. NS 12.3.4 Fig. NS 6.
CY CZ	Default see NS 3472	Buckling curve coefficient, a about local z-axis (strong axis). Represent the a, a0, b, c, d curve.	Fig. NS 3 Sec. NS 12.2 NS Table 11
DMAX	100.0 [cm]	Maximum allowable depth of steel section.
DMIN	0.0 [cm]	Minimum allowable depth of steel section.
FYLD	235	Yield strength of steel, fy (St37) [N/mm² ]	Tab. NS 3
MF	1.1 (NS3472) 1.15 (NPD)	Material factor / Resistance factor, γ_m	Sec. NS 10.4.2 Sec. NPD 3.1
RATIO	1.0	Permissible ratio of the actual to allowable stresses.	Sec. NS 12.3.4.2
SSY	0.0	0.0 = No sidesway. β calculated. > 0.0 = Sidesway in local y-axis weak axis β_M=SSY	Sec. NS 12.3.4 Tab. NS 12 Sec. NPD 3.2.1.4
SSZ	0.0	0.0 = No sidesway. β calculated. > 0.0 = Sidesway in local y-axis weak axis β_M	Sec. NS 12.3.4 Tab. NS 12 Sec NPD 3.2.1.4
TRACK	0.0	Controls the level of detail in the output: 0) Suppress critical member stresses. 1) = Print all critical member stresses, i.e., DESIGN VALUES 2) = Print von Mises stresses. 3) Print member results, sorted by member number 9) = Detailed output (Large output, 1 page for each member) 31) Max / min output for end no. 1 32) Max / min output for end no. 2 49) Joint force output 98) Joint capacity 99) Joint capacity Refer to D12.A.8 Tabulated Results for complete list of available TRACKs and print examples.
UNL	Member length	Effective length for lateral buckling calculations (specify buckling length). Distance between fork supports or between effective side supports for the beam	Sec. NS 12.3

The parameter CMY will, when given with negative value, define an inside pressure in pipe members. The pressure corresponds to given water depth in meters.

The parameter CB defines the φ value with respect to calculation of the ideal lateral buckling moment for single symmetric wide flange profiles, ref. NS app. 5.2.2.

D12.A.3.1 Example

Note: This is a partial example containing only the information pertaining to the Norwegian steel design code; used at the end of the input file.

* Code check according to NS3472
PARAMETERS
CODE NS3472
BEAM 1.0 ALL
FYLD 340 ALL
MF 1.10 ALL
CY 0.49 MEMB 1
CZ 0.49 MEMB 1
BY 0.9 MEMB 1
BZ 0.7 MEMB 1
SSY 1.1 MEMB 1
SSZ 1.3 MEMB 1
CB 0.9 MEMB 1
RATIO 1.0 ALL
TRACK 9.0 ALL
UNIT KNS METER
LOAD LIST 1
CHECK CODE MEMB 1
FINISH