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D1.B.3.4 General Format

RHOLE r1 r2 r3 Memb <list> 
CHOLE c1 c2 c3 Memb <list> 


  • r1, r2, and r3 and c1, c2, and c3 are the section locations of three rectangular and three circular openings respectively, along the length of the member in ascending order from the start of the member (i.e., r1< r2<r3 and c1< c2<c3)


The maximum number of openings allowed for each member is three. Thus there can be three rectangular openings, three circular openings, or a combination of three rectangular and circular openings for each member.

RDIM [l1 d1] [l2 d2] [l3 d3] Memb <list> 

Where l1, l2, and l3 are the three different lengths and d1, d2 and d3 are the three different depths of the rectangular openings.

CDIA d1 d2 d3 Memb <list> 

Where d1, d2, and d3 are the three different diameters of the circular openings.

HECC e1 e2 e3 Memb <list> 

If the eccentricity of the opening is in the negative local Y-axis of the member the sign should be negative.

ELECTRODE f Memb <list> 

Where f is the weld material used to calculate size and length of fillet weld required to connect reinforcing bars on beam web at opening.


RDIM 10.0 5.0 20.0 10.0 MEMB 5 CHOLE 0.8 MEMB 5 CDIA 10.0 MEMB 5 ELECTRODE 3 MEMB 5

The above example shows that member 5 contains two rectangular openings at sections 0.4 and 0.6 whereas one circular opening is located at section 0.8 of the member. The dimensions of rectangular openings are 10.0 × 5.0 and 20.0 × 10.0 inch respectively whereas diameter of circular opening is 10.0 inch.