1) 2.40 m wide, 0.60 m deep reaching to span up to 20 m. 

2) 1.20 m wide, 0.35 m deep reaching to span up to 14 m.

This type of Double- T slabs are widely used at large span halls as well as the schools, buildings, water and electricity projects, etc, which difficult to be performed by the traditional techniques by the site casting. Also, they are used for minimizing and saving time substantially and for expediting the implementation process at the large projects.