Precast/Prestressed Girder Help

Box Beam Properties

Table 1. Box Beam Section Properties
Section ID	BI-36	BI-48	BII-36	BII-48	BIII-36	BIII-48	BIV-36	BIV-48
A (in² )	561	692.4	620.9	752.9	680.9	812.9	711	843
MI (in⁴)	50334	65940	85152	110498	131144	168367	158644	203087
Cg (in)	13.35	13.37	16.29	16.33	19.25	19.29	20.73	20.78
h (in)	27	27	33	33	39	39	42	42
b (in)	36	48	36	48	36	48	36	48
TH1 (in)	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5
BH1 (in)	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5
SW (in)	5	5	5	5	5	5	5	5
SS (in)	3	3	3	3	3	3	3	3
Vol/Area^a (in)	2.24	2.813	2.793	2.786	2.765	2.763	2.753	2.753

Note:

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.
For stems, top width = bottom width.
For flanges, top width and thickness = bottom width and thickness.

Strand Templates for Box Beams

Strand Templates for Box Beams