Applies To
	Product(s):	STAAD.Pro
	Version(s):	All
	Environment:	N/A
	Area:	Design
	Subarea:	American Steel Design
	Original Author:	Bentley Technical Support Group

What do the following parameters mean?

NSF 0.85 ALL
BEAM 1.0 ALL
KY 1.2 ALL
RATIO 0.9 ALL
LY 18 ALL
LZ 18 ALL
CHECK CODE ALL

NSF 0.85: This parameter is called Net Section Factor. One of the criteria used in determining the capacity of a section in Axial Tension is fracture of the net section. The capacity is calculated as NSF X Gross Area X Ultimate Tensile Strength of steel in tension

BEAM 1.0: This means the design or code checking of the member will be done by determining the safety of the member at a total of 13 points along the length of the member. Those 13 points are the start, the end, and 11 intermediate points along the length. 

KY 1.2: The effective length factor KY used to determine the slenderness KyLy/ry about the Y axis is 1.2

RATIO 0.9: The code requires one to check the safety of a member by verifying several interaction equations for compression, bending, tension, etc. The right hand side of these equations is usually 1.0. The RATIO parameter allows one to set the right hand side to the value of the RATIO parameter, in this case 0.9.

LY 18: The unsupported length used in calculating the slenderness KyLy/ry for flexural buckling about the Y axis is 18 ( in current length units)
LZ 18: The unsupported length used in calculating the slenderness KzLz/rz for flexural buckling about the Z axis is 18 ( in current length units)

CHECK CODE ALL : Design command assigned to all members. The safety of the section is determined by evaluating the ratio of demand to section capacity as per the code requirements.