STRUCTURAL COORDINATION & SLAB DESIGN GUIDE

Anchoring details, slab thickness, post-tension coordination, and footing requirements, get these right before concrete is poured or pay for it later.

The three failures that cause change orders.

The three most common, and most costly, coordination failures happen around slab thickness, post-tension cable conflicts, and footing rebar density. Each one is preventable with early planning.

Reinforcing steel prepared for a concrete slab
Slab Thickness

7″ minimum. No exceptions on doubles.

M12 × 160mm anchors embed 5″. A 7″ slab leaves 2″ of concrete below the bolt—enough to resist shear under an 8,425 lb load. A 6″ slab leaves 1″. The math doesn’t bend.

Anchor M12 × 160mm
Embed 5″ deep
Load 8,425 lb
Slab ≥ 7″

Do not value-engineer slab thickness.
Punch-through risk is non-negotiable.

01 / 03

Failure 1 of 3: Slab Thickness

Early coordination checklist

  • Confirm slab thickness ≥ 7″ in all stacker zones before pouring. No exceptions for double-high units.

  • Map all PT cable paths and provide anchor layouts to the structural engineer before cable placement.

  • Coordinate footing rebar density for triples and quads with the stacker vendor before the footing design is finalized.

  • Concrete grade C30 minimum or as specified by the structural engineer. Verify compressive strength meets anchor pull-out requirements.

  • Anchor bolt spec: M12 × 160mm. Drill depth ≥ 4″. Verify there are no rebar conflicts at each anchor point.

  • Weight distribution plan: 4,212.5 lbs per baseplate. Confirm the slab can handle point loads at all stacker locations.

Send us your slab plans. We’ll flag the change orders before they happen.

Our engineering team reviews structural drawings against stacker specifications and returns annotated red-lines, typically within three business days. No charge, no obligation.

Turnaround

3 business days

Reviewed by

Licensed engineers

Format

Annotated PDF red-lines

Cost

Free, no commitment