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Formwork Pressure

CSA S269.1-16
v1.0.0
File:
Project:
Designer:
Date:

Units

Placement

Placement method:
Element type:
info
Element type applies to internally vibrated concrete. Columns (no plan dimension exceeding 1.2 m) are designed for full hydrostatic pressure unless the rate of placement, mix and depth of vibration are controlled to the design values (§5.5.3.3.1.2).

Form Geometry

Height of concrete placement, h:
m
Depth of vibrator immersion, hi:
m
info
Depth of immersion of the internal vibrator. Used by Equation 2 and in the equation-selection limits (§5.5.3.3.1.3.4 and §5.5.3.3.1.3.6).

Concrete

Rate of placement, R:
m/h
Concrete temperature, Tc:
°C
Slump:
mm
Unit weight, W:
kg/m3

Cement

Composition:
info
Coefficients are taken from Table 4 (Kc) and the Clause 5.5.3.3.1.3.4 list (Cc). Table 4 does not tabulate Kc for "> 70% slag / > 40% flyash" or for "both slag & flyash with a retarder"; for those combinations Equations 2 and 3 cannot be evaluated.
Retarder:

Site Condition

info
Where construction is more than 3 m (10 ft) above ground or closer than 3 m (10 ft) from an exterior or interior edge, the limiting pressure shall not be taken as less than 48 kPa (§5.5.3.3.1.3.3).
Thinking...

This information must be read or used in conjunction with CAN/CSA S269.1-16, Falsework and formwork. In the event of discrepancies, CAN/CSA S269.1-16 shall govern.

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