What Is Two-Way Slab Design per ACI 318?
Two-way (the ACI 318 8's — the DDM/EDFM; the flat) designs (the slab's — the mx/my; the 8.10) via (the DDM's — the direct; the 8.10.2's) or (the EFM's — the equivalent; the 8.11's). The design: the 8.10's (the DDM's — the coefficients; the limitations'), the 8.11's (the EFM's — the frame's; the stiffness'), and the 8.7's (the minimum's — the h's; the ln/30's). The slab's — the two-way designed.
Best price · Quotes back fast · PE stamps backed by Apex Grid Engineering
The DDM
The 8.10.2 (the limitations' — the 3-span's; the rectangular's — the 2:1's), the Mo (the wul2ln²/8's — the static; the total), the 65/35 (the interior's — the negative/positive; the exterior's — the 75/30), the 8.10.4 (the moments' — the distributed; the column's — the middle's), and the 8.7 (the h's — the ln/30's; the 5-inch's — the minimum).
The EFM
The 8.11 (the frame's — the equivalent; the 3D's — the 2D's), the K (the stiffness' — the slab-beam's; the column's — the torsional), the alpha_f (the beam's — the ratio's; the 0's — the flat), the FEM (the verified — the 8.11's; the modeled), and the 8.4 (the analysis' — the 1.4D's; the factored).
Details
The drop (the panels' — the 1.25h's; the shear's), the 22.6 (the punching's — the b0's; the checked), the integrity (the 2-bottom — the continuous; the 8.7.5's), the PT (the 12's — the chapter's; the balanced's), and the deflection (the ln/240's — the immediate; the ln/480's — the total). The two-way's — the ACI 8's chapter.
The bottom line
Design two-way slabs per ACI 318 Ch. 8 (DDM within 8.10.2 limits: 3+ spans, rectangular ≤2:1, Mo = wul2ln²/8 split 65/35; else EFM per 8.11) — minimum h = ln/30, check punching per 22.6.
Torch Engineering PLLC · (480) 490-0064 · info@torchengineering.com — PE stamping backed by Apex Grid Engineering.