D9.A.7 Design Parameters

The program contains a number of parameters which are needed to perform the design. Default parameter values have been selected such that they are frequently used numbers for conventional design requirements. These values may be changed to suit the particular design being performed. Table 10A.1 contains a complete list of the available parameters and their default values. It is necessary to declare length and force units as centimeters and Kilograms before performing the concrete design.

Note: Once a parameter is specified, its value stays at that specified number until it is specified again. This is the way STAAD.Pro works for all codes.

Table 1. Japanese Concrete Design Parameters
Parameter Name	Default Value	Description
CODE	-	Must be specified as `JAPAN`. Design code to follow. See TR.53.2 Concrete Design-Parameter Specification.
BIAXIAL	0.0	Value to define biaxial or uniaxial design type for Column 0. uniaxial design only 1. design for biaxial moments
CLEAR	3.0 cm (beam) 4.0 cm (Column)	Clear cover for Beam or clear side cover for column.
DEPTH	YD	Depth of concrete member. This value defaults to YD as provided under MEMBER PROPERTIES.
EFACE	0.0	Face of support location at end of beam. (Note: Both SFACE & EFACE are input as positive numbers).
FC	210 Kg/cm²	Compressive Strength of Concrete.
FYMAIN	SR235	Steel grade. Acceptable values for steel grade and their associated yield stress values are shown in the following table. Program automatically calculates yield stress value depending on design load type (permanent or temporary).
FYSEC	SR235	Same as FYMAIN except this is for secondary steel.
LONG	0.0	Value to define design load type 0. Permanent Loading 1. Temporary Loading
MAXMAIN	41.0 cm	Maximum main reinforcement bar size
MAXSEC	41.0 cm	Maximum secondary reinforcement bar size.
MINMAIN	10 mm	Minimum main reinforcement bar size.
MINSEC	10 mm	Minimum secondary reinforcement bar size.
MMAG	1.0	Design moment magnification factor
NSECTION	12	Number of equally-spaced sections to be considered in finding critical moments for beam design.
REINF	0.0	Tied Column. A value of 1.0 will mean spiral.
SFACE	0.0	Face of support location at start of beam.
SMAG	1.0	Design shear magnification factor
TORSION	0.0	Value to request for torsion design for beam 0. torsion design not needed 1. torsion design needed
TRACK	0.0	Specify the level of detail in the output: 0) Beam and Column Design - Minimum details 1) Beam Design - Intermediate level details; Column Design - `TRACK 0` detail and column interaction 2) Beam Design - `TRACK 1` detail and steel required at 1/12th sections; Column Design - `TRACK 1` detail and interaction diagram
WIDTH	ZD	Width of concrete member. This value defaults to ZD as provided under MEMBER PROPERTIES.

Table 2. Table of permissible Steel Grades and associated Yield Stresses for `FYMAIN` and `FYSEC` parameters
Steel Grade	Long Term Loading		Short Term Loading
Steel Grade	Tension & Compression	Shear Reinforcement	Tension & Compression	Shear Reinforcement
SR235 SRR235 SDR235	1600	1600	2400	2400
SR295 SRR295	1600	2000	3000	3000
SD295A SD295B SDR295	2000	2000	3000	3000
SDR345 SD345	2200 (2000)	2000	3500	3500
SD390	2200 (2000)	2000	4000	4000