Two-Way Flexural Behavior of Donut-Type Voided Slabs

International Journal of Concrete Structures and Materials

Table 1 Details of specimens.

ID	Length × width × height (mm)	Clear span (mm)	Effect depth (mm)	Top rebar		Bottom rebar		Reinforcement ratio (%)		Void former		Fixing method type
ID	Length × width × height (mm)	Clear span (mm)	Effect depth (mm)	X-dir.	Y-dir.	X-dir.	Y-dir.	X-dir.	Y-dir.	Shape	Material	Fixing method type
Solid	3300 × 3300 × 250	2850 × 2850	217.3	20-D10		20-D13		0.353		–	–	–
TF–D–S–P.P								0.353		Donut	P.P	Spacer
TF–D–M–P.P								0.353 [0.40]	0.353	Donut	P.P	Merged

Where TF two-way flexure/D donut shaped void former/P.P polypropylene plastic, S spacer type fixing method, M merged type fixing method.
[ ] Considering the legs of the merged type fixing device.