1.	Use 25mm wheel & chair spacer for slabs & joist not exposed to earth. Refer to IFC drawing VA-846497 sheet#1. 25mm spacers are to be used as chair and wheel spacers only where 25mm is allowed for vertical clearence.
2.	Use 50mm chair spacer for beams, column, buildings, walkways, stair & equipment pads. This is in compliance with SAES Q-001 paragraph 5.8, Table#2.
3.	Use 70mm chair spacer for concrete cast exposed to earth. Refer to SAES Q-001 paragraph 5.8, Table#2.
