Reinforced concrete & steel base plates
Strength design (LRFD) to ACI 318-19 and AISC Design Guide 1 — column P-M interaction, beams in flexure & shear, slender beam-columns with moment magnification, in-plane shear walls with openings, opening headers and coupling beams, footings under axial + moment, and steel column base plates with moment. Every equation, substitution and code reference is shown in full, with a printable calculation package.
Concrete Column
Tied rectangular column P-M interaction by strain compatibility (ACI 318-19 Ch. 22).
Open →Concrete Beam
Rectangular beam flexure (phiMn) and one-way shear with stirrups (ACI 318-19).
Open →Slender Beam-Column
Nonsway moment magnification (delta_ns) then P-M interaction (ACI 6.6.4).
Open →Concrete Shear Wall
In-plane wall shear & approximate flexure with an opening (ACI 318-19 11.5/18.10).
Open →Opening Header
Header / coupling beam over an opening — conventional or diagonal reinforcement (ACI 18.10.7).
Open →Footing + Moment
Spread footing under axial + moment — bearing distribution, shear & flexure (ACI/IBC).
Open →Base Plate + Moment
Steel column base plate with moment — bearing, anchor tension & plate thickness (AISC DG1).
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