Why Choose ACO SlabDrain — HSK Series?

Technical: HSK channels combine a polymer concrete body and ductile iron edge for superior impact resistance, low water absorption, and long service life. The neutral (flat) invert supports decks and plazas where depth is limited, while male/female joints, anchoring, and bottom knockouts streamline layout, embedment, and vertical tie-ins.

Overview: It’s a shallow, heavy-duty drain that fits tight slabs, installs quickly, and stands up to traffic and weather.

• Widths: 4″ (H100SK), 8″ (H200SK), and 12″ (H300SK) internal widths for right-sized hydraulics.
• Profile: Neutral-depth (flat invert) for parking structures, plazas, balconies, and retrofits.
• Connectivity: Male/female interlocks, anchoring for secure embedment, and bottom knockouts for vertical outlets.
• Load Class: Up to EN 1433 Class F for heavy traffic and equipment.

Best-Fit Applications

Use HSK where depth is tight but loads are high and maintenance needs to be quick:

Grates & Locking

• Grates: Slotted, longitudinal (ADA-compliant), and heel-resistant patterns.
• Locking: PowerLok boltless system for tool-free access (optional bolt-down where specified).

Design & Selection Tips

Technical: Match width (4″ / 8″ / 12″) to peak flows and grate open area. Select Class F where heavy vehicles traverse the trench. Coordinate surrounding surface slopes toward the channel (neutral invert), and plan vertical outlets via bottom knockouts where fall is constrained.

Overview: Size the channel for your worst rain, choose a heavy-duty grate if trucks cross it, slope the paving toward the drain, and use the bottom outlets when you can’t run a long sloped trench.

Quick Spec Checklist

• Body: Polyester polymer concrete with ductile iron edge for impact and load transfer.
• Widths: H100SK (4″), H200SK (8″), H300SK (12″).
• Profile: Neutral (flat) invert for shallow-depth structures and retrofits.
• Connections: Male/female joints, anchoring, and bottom knockouts for vertical tie-ins.
• Grates/Locks: Heavy-duty ductile iron grates; PowerLok boltless (optional bolt-down).

Installation Checklist (Step-by-Step)

1. Layout & slopes: Establish paving falls toward the trench; confirm vertical outlet locations.
2. Subbase & bedding: Prepare stable subgrade; set bedding per spec to support channel walls/edges.
3. Set channels: Engage male/female joints, check line/grade; use anchoring to secure for pour.
4. Outlets & end caps: Knock out bottoms as needed; install end caps and vertical connectors.
5. Haunch & pour: Concrete to edge rail elevation; lightly vibrate to eliminate voids.
6. Grates & locks: Fit ductile iron grates; engage PowerLok (or bolt-down) per spec.
7. QA flush: Water test; verify positive flow and clean transitions at paving joints.

Case Study: Parking Deck Retrofit with Vertical Tie-Ins

Challenge: A municipal parking structure suffered ponding at column lines. Depth was limited, and existing storm risers were fixed, requiring vertical connections at specific bays.

Solution: Engineers specified H200SK (8″) with ductile iron grates and PowerLok. The team used bottom knockouts for vertical drops to the risers and anchored channels before the topping slab pour. Neutral invert allowed the surface to provide fall toward the trench.

Outcome: Post-retrofit inspections showed no standing water at problem bays. Maintenance crews praised the tool-free PowerLok access for rapid cleaning, and traffic noise over the grates decreased due to the ductile edge/rail interface.

Next Steps

Ready to select width, grate pattern, and outlet plan for your project?

Get an ACO SlabDrain HSK Quote