In US Customary units (psi), the tensile strength or shear capacity formulas contain unique constants. In the Metric version, these constants are completely different to account for the scale change to Megapascals. For instance, the simplified shear capacity of concrete ( Vccap V sub c ) changes as follows: : fc′f sub c prime is in psi) SI Metric : fc′f sub c prime is in MPa)
: The code now better accommodates the use of high-strength steel, with updated yield strength definitions using the 0.2% offset method. Why PCA Notes are Essential for Metric Design
: Explicit metric limits are mapped alongside corresponding minimum requirements based on exposure severity. Sectional Strength & Flexure (Chapter 22 & Member Chapters) Calculating the nominal flexural strength ( Mncap M sub n ) requires utilizing metric material parameters: Modulus of Elasticity ( Eccap E sub c ) : Calculated as is in MPa). Modulus of Rupture ( ) : Defined as in metric units, critical for cracking moment ( Mcrcap M sub c r end-sub ) and serviceability deflection checks. pca notes on aci 31814 metric pdf exclusive
Formulas, tables, and graphs are already converted to SI units, reducing conversion errors.
Which you are designing (e.g., column, beam, two-way slab) Your specific concrete strength ( ) and steel yield strength ( ) in MPa In US Customary units (psi), the tensile strength
Explicit SI unit formatting means design examples in the notes use (MPa) for stress and for length. Essential Topics Covered in PCA Notes on ACI 318-14
I can provide the targeted metric formulas and design steps based on the ACI 318-14 framework. Share public link Why PCA Notes are Essential for Metric Design
To avoid repetition, general requirements applicable to all members are placed in "toolbox" chapters at the end of the code document: : Concrete: Design and Durability Requirements
Select metric rebar sizes (e.g., 10M, 15M, 20M, 25M, 30M, 35M). Check minimum reinforcement limits ( As,mincap A sub s comma m i n end-sub ) using metric equations: