404Slab-on-gradeElectrical and plumbing
Slab-on-Grade 2-Tier KO Support
Two-tiered slab-on-grade knockout support, tiers 4 in. apart: two different pipe sizes, and couplings pass, on each tier.
Give us the size, drop and service and we’ll spec the part number and quote the build.
In use.
Function
Pre-pour
Temporary securement device: positions and secures the utility before and during the concrete pour.
No rating
No load rating is published; the cured concrete carries the utility.
The cured concrete carries the utility.
Custom order
Specify the size
Custom made per order.
Height: 12, 18 or 24 in. (XX other)
Hole ID: 1.00 (1.25 KO) / 1.25 (1.50 KO) / 1.50 (1.75 KO) / 1.75 (2.00 KO) / 2.00 in. (2.25 KO) (XX other)
KO quantity, 1 to 12; crossbar width per the table
Part number404A__B__C__Finish the selections to complete the request.
Knockouts
| 1 | 1.75 | 2 | 2.25 | 2.5 | 2.75 |
| 2 | 3.5 | 4 | 4.5 | 5 | 5.5 |
| 3 | 5.25 | 6 | 6.75 | 7.5 | 8.25 |
| 4 | 7 | 8 | 9 | 10 | 11 |
| 5 | 8.75 | 10 | 11.25 | 12.5 | 13.75 |
| 6 | 10.5 | 12 | 13.5 | 15 | 16.5 |
| 7 | 12.25 | 14 | 15.75 | 17.5 | 19.25 |
| 8 | 14 | 16 | 18 | 20 | 22 |
| 9 | 15.75 | 18 | 20.25 | 22.5 | 24.75 |
| 10 | 17.5 | 20 | 22.5 | 25 | 27.5 |
| 11 | 19.25 | 22 | 24.75 | 27.5 | 30.25 |
| 12 | 21 | 24 | 27 | 30 | 33 |
03 · Notes
From the Technical Data Sheet
- Two-tiered slab-on-grade knockout support, tiers 4 in. apart: two different pipe sizes, and couplings pass, on each tier.
- Patent pending.
- Work safe: the installer secures pipes in place prior to rebar.
- Galvanized rod; corrosion resistant.
- Designed for demanding high-rise construction.
- Electrical and plumbing: positions PVC conduit, PVC-coated GRC, ENT and PVC- jacketed MC (NEC 352.30, 344.30, 362.30, 330.30) and sleeved PEX (IPC 305, UPC 312.2) in the pour, secured so they cannot float, shift or separate at joints; spacing per the specifications and the manufacturer.
- Drawings not to scale.
Send the spec. We’ll build the support.
Size, drop, and service. We’ll spec the part number and quote the build.