Definition layout of log.provided reinforcement for rectangle column

 

Rectangular cross-section is typical case of column and there is possible to define three type of layouts

• edge
• corner
• number

 

Edge layout

This layout allows to define reinforcement for main and weak edge. Default main edge is edge perpendicular to z axis of LCS and this direction can be changed by icon Main direction above table of longitudinal reinforcement

The corner bars in this layout are taken into account only for main edge, it follows that area of reinforcement of corner bars is always taken into account for main edge, see picture below. The more layers of reinforcement can be defined only for main edge and for Type = Fix or List by diameter.

 

Corner layout

 

This layout allows to define different diameter of reinforcement for corner bars and for bars on the edges (main and weak). Default main edge is edge perpendicular to z axis of LCS and this direction can be changed by icon Main direction above table of longitudinal reinforcement.

The number of corner bars is fixed (number = 4) and these corner bars is uniformly distributed to main and weak edge (2 bars for main edge and 2 bars for weak edge), it follows that half area of each corner bar is taken into account for main edge and half for weak edge, see picture below. Only one layer is supported for this type of layout.

 

Number layout

This layout allows to define number of bars for whole cross-section. Default main edge is edge perpendicular to z axis of LCS and this direction can be change by icon Main direction above table of longitudinal reinforcement.

The number of bars is distributed to edges according dimensions of rectangular cross-section according following formulas

n_cor = 4

n_edge,y = max(Round(b×(N-4)/(2×b+2×h));0)

n_edge,z = Max(N- n_cor – 2× n_edge,y)/2;0)

where

N – number of input bars

b – dimension of rectangular cross-section in direction Y

h - dimension of rectangular cross-section in direction Z

The corner bars is uniformly distributed to main and weak edge (2 bars for main edge and 2 bars for weak edge), it follows that half area of each corner bar is taken into account for main edge and half for weak edge, see picture below. Only one layer is supported for this type of layout.