Experimental Study to Determine the Failure Criteria of Concrete at Its Early-Age

Table 1

Minimum requirements of concrete strength for the removal of underside formwork.

Structural member type	Structural member span (m)	Percentage of the standard value of the designed cubic compressive strength of the concrete (%)
Formwork	≤2	≥50
	>2, ≤8	≥75
	>8	≥100
Beam, arch, and shell	≤8	≥75
	>8	≥100
Cantilever member	—	≥100