Rectangular Beam with Circular Voids Properties

Rectangular Beam with Circular Voids Properties

Table 1. Hollow Core Slab Section Properties

Section ID	SI-36	SII-36	SIII-36	SI-48	SII-48	SIII-48
A (in2 )	439	491	530	569	628	703
MI (in4)	9,725	16,514	25,747	12,897	21,855	34,517
h (in)	15	18	21	15	18	21
Yb (in)	7.5	9.0	10.5	7.5	9.0	10.5
b (in)	36	36	36	48	48	48
n	2	2	2	3	3	3
d (in)	7.995	10.005	12.000	8.000	10.000	11.333
b1 (in)	10.6675	10.3325	10.0000	10.0000	9.5000	9.1670
b2 (in)	14.665	15.335	16.000	14.000	14.500	14.833
Vol/Areaa (in)	2.88	2.87	2.80	2.83	2.78	2.87

Note:

1. Vol/Area is calculated as the cross-sectional area of the girder divided by the perimeter. For box beams, consider the internal and external perimeters.