Raised access floor systems that carry power, data and air underfoot: ConCore and All Steel panels, bolted stringer and Posilock understructure, airflow panels and 11 finish families. Installed throughout Michigan and Indiana by LG2 LLC.
Raised floor system
A raised access floor is a grid of removable panels on adjustable pedestals. The space below carries power, data and air, and any panel lifts out to reach it. Start with the panel family, then pick the understructure and finish.
Panels · Cement-filled steel
All-steel welded panels filled with a cementitious core. Six load ratings cover everything from general office floors to heavy rolling loads.
Panels · Lightweight steel
A non-cementitious, all-steel panel for areas with lighter loads where a cement core isn't needed.
Panels · Underfloor air
Grates and perforated panels that drop into a stringered floor in place of a solid panel to deliver air from the underfloor plenum.
Panel selector
Every panel is 24" square with a Class A flame spread rating and an epoxy paint finish. Loads below are Tate's published system performance, tested on actual understructure.
Swipe the table sideways to see all seven panels.
| Specification | All SteelAll Steel 1250 | ConCoreConCore 1000 | ConCoreConCore 1250 | ConCoreConCore 1500 | ConCoreConCore 2000 | ConCoreConCore 2500/3000 | ConCoreConCore 4000 |
|---|---|---|---|---|---|---|---|
| Intended for | Light loads where a cement core isn't needed | Total load of 1,000 lbs or less | Total load of 1,250 lbs or less | Total load of 1,500 lbs or less | Total load of 2,000 lbs or less | Heavy total loads | Heavy total loads |
| Construction | All steel, non-cementitious | Welded steel, cement core | Welded steel, cement core | Welded steel, cement core | Welded steel, cement core | Welded steel, cement core | Welded steel, cement core |
| Design load | 1,250 lbs | 1,000 lbs | 1,250 lbs | 1,500 lbs | 2,000 lbs | 2,500 / 3,000 lbs* | 4,000 lbs |
| Ultimate load | Min. 2,500 lbs | Min. 2,000 lbs | Min. 2,500 lbs | Min. 3,000 lbs | Min. 4,000 lbs | Min. 5,000 / 6,000 lbs* | Min. 8,000 lbs |
| Rolling load, 10 passes | 500 lbs | 800 lbs | 1,000 lbs | 1,250 lbs | 1,500 lbs | 2,000 / 2,700 lbs* | 2,700 lbs |
| Rolling load, 10,000 passes | 500 lbs | 600 lbs | 800 lbs | 900 lbs | 1,100 lbs | 2,000 / 2,400 lbs* | 2,400 lbs |
| Impact load | 150 lbs | 150 lbs | 150 lbs | 150 lbs | 200 lbs | 200 / 300 lbs* | 300 lbs |
| Panel weight (bare) | 5.5 lbs/ft² | 7.5 lbs/ft² | 8.0 lbs/ft² | 9.0 lbs/ft² | 10.25 lbs/ft² | 12 lbs/ft² | 12.45 lbs/ft² |
| System weight | 6.0 (Posilock) · 7.0 (stringer) lbs/ft² | 8.0 (Posilock) · 9.0 (stringer) lbs/ft² | 8.5 (Posilock) · 9.5 (stringer) lbs/ft² | 9.5 (Posilock) · 10.5 (stringer) lbs/ft² | 11.75 lbs/ft² | 13.0 / 13.5 lbs/ft²* | 13.95 lbs/ft² |
| Understructure | Posilock / Cornerlock, 4' bolted or box stringer | Posilock / Cornerlock (std or LFFH), 4' bolted or box stringer, 2' LFFH bolted stringer | Posilock / Cornerlock (std or LFFH), 4' bolted or box stringer, 2' LFFH bolted or box stringer | Posilock / Cornerlock (std or LFFH), 4' bolted or box stringer | 4' bolted or box stringer | 4' bolted stringer (2500) or 2" deep bolted stringer (3000)* | 2" deep bolted stringer |
* ConCore 2500/3000 is rated 2,500 lbs on a 4' × .054" bolted stringer in a basketweave pattern and 3,000 lbs on a 2" deep × 4' bolted stringer. Rolling loads are listed for 10 and 10,000 passes. Tate may change specifications without notice; LG2 confirms every floor against current datasheets.
Panels · Cement-filled steel
ConCore is Tate's cement-filled steel panel: a welded steel shell filled internally with a cementitious core. It comes in six ratings, so the same system can run from general office areas to heavy rolling loads.
ConCore 1000, 1250, 1500 and 2000 are rated for total loads up to their number. ConCore 2500/3000 and 4000 handle heavy loads on bolted and 2" deep bolted stringers. Panels can be bare for carpet tile or PosiTile, or factory laminated with HPL, ESD vinyl, porcelain, linoleum, LVT, wood, rubber or terrazzo.
Panels · Lightweight steel
The All Steel 1250 is a non-cementitious panel for areas with lighter loads, where a cement core isn't needed. It carries a 1,250 lb design load at just 5.5 lbs/ft² bare. Finish it with carpet tile or PosiTile, freelay resilient tile or LVT planks, or factory-laminated HPL.
Pedestals & stringers
Adjustable steel pedestals set the finished floor height. Stringers, or a stringerless Posilock head, lock the grid together and set how the floor handles rolling and lateral loads.
Stringers bolt to the pedestal heads and tie the understructure together, which minimizes movement, spreads load and keeps the floor level over time.
A deeper stringer for the heaviest panels, built for heavy rolling loads and demanding use.
A stringerless system: the pedestal head engages and positions each panel without stringers.
Short pedestals for a shallow underfloor space, where there's room for cabling but not a deep plenum.
Tate's datasheets also list a 4' box stringer option for All Steel 1250 and ConCore 1000 to 2000.
Underfloor air
With the underfloor space used as an air plenum, airflow panels take the place of solid panels wherever air needs to come up. Grates like GrateAire and DirectAire X2 retrofit into an existing stringered floor without modification, so cooling can move as racks, rooms and loads change.
Directional panels such as DirectAire and DirectPerf 32 angle the air toward the face of the server rack; grates and perforated panels deliver a vertical plume for contained aisles. Dampers adjust from the top, and several models offer manual or automatic airflow control.
| Panel | Construction | Open area | Airflow | Notes |
|---|---|---|---|---|
| DirectAire® | Welded steel grate | 68% | 2,850 CFM at 0.10" H₂O | Angles air toward the rack face; 2,500 lb design load; pairs one-to-one with a standard 42U rack; manual and automatic airflow control |
| DirectAire AL | Die-cast aluminum | 60% | 2,775 CFM at 0.10" H₂O | Lightweight directional panel; 1,500 lb design load; surface adjustable damper |
| DirectAire X2 | Welded steel grate | Not published | Two-direction throw | For cold aisles only one panel wide; feeds the racks on both sides; manual and automatic airflow control |
| DirectPerf 32 | Perforated panel | 32% | 1,285 CFM at 0.1" H₂O (no damper) | Directional and vertical perforations spread air across the rack face; fits existing 24" and 60 cm floors |
| GrateAire | Die-cast aluminum | 56% | Damper restricts up to 100% | With or without a top-adjustable damper that restricts airflow up to 100%; suited to contained aisles |
| HD GrateAire | Die-cast aluminum | 56% | Damper balances to aisle load | High strength, low weight; for ConCore or All Steel bolted stringer systems; optional top-adjustable damper |
| Perforated panel | Perforated all steel | 25% | Vertical plume | Top-adjustable damper; Smoke Grey powder coat or HPL, vinyl or rubber faces; interchangeable with laminated ConCore and All Steel panels |
Finishes
Eleven finish families, from carpet tile and wood to terrazzo and static control vinyl. Some are factory laminated to the panel; others lay over it and lift off. Either way, the underfloor stays reachable.
Magnetized engineered wood planks, 7.48" wide in random 59" to 90" lengths, with a micro bevel to protect the edges. The magnetic backing lifts easily to reach any part of the service void.
Four ultrasonically welded buttons on the back of each tile index into four holes in the panel, so tiles align one-to-one and lift with the panel. Tate partners with several carpet tile makers for a wide range of styles.
Static control vinyl, factory laminated to the panel, that keeps static discharge away from sensitive equipment. Static control and static dissipative options; damp mop only, no waxing.
Premium porcelain laid without adhesive, so tiles come up and go back without demolition. Durable and dimensionally stable, with finishes from Casalgrande® Stonetech.
Factory laminated to the panel. Superior wear resistance: it won't detach, chip or crack, and needs only a damp mop. Laminates from Formica® and Nevamar®.
Factory-laminated porcelain in single-piece and multi-piece designs. Edge banding guards against chipping and gives clean, even lines that read like grouted tile.
0.100" (2.5 mm) Forbo Marmoleum Real, Fresco and Vivace, in marbled, concrete and stone looks. Topshield2 double UV-cured finish needs only normal cleaning.
0.120" (3 mm) Tarkett Contour series in wood, stone and abstract designs, with a monolithic edge on ConCore panels.
7/16" (11 mm) engineered hardwood in 4" wide planks, in multiple species, factory pre-finished with an easy-care UV-cured acrylic.
0.125" (3 mm) Nora Sentica or Envirocare, plus collections from Johnsonite, Flexco and Zandur. Nora needs no finishing, waxing or sealing, and its dense, nonporous surface repels dirt.
Natural or recycled marble chips in a flexible resin, laminated to ConCore and then sealed and polished in the field. Precise sizing keeps lines clean and the underfloor easy to reach.
For architects & specifiers
Size the panel to the heaviest concentrated and rolling loads, then set the understructure by floor height, lateral and seismic needs, and the finish.
Applications
Anywhere services need to move with the space: HVAC, power and data run beneath the floor instead of through the ceiling, so layouts stay flexible.
Route power, data and HVAC underfoot so furniture, desks and rooms can move without new ceiling or wall work. Carpet tile lifts right with the panel.
Heavy-load ConCore panels on bolted stringers, HPL faces and airflow panels that put cooling air where the racks need it.
ESD vinyl for clean rooms, electronic labs and operating theaters, where static control protects sensitive equipment.
Static control finishes and a service space for the dense cabling behind consoles and workstations.
Durable terrazzo, linoleum, rubber or wood finishes over an access floor that keeps building services reachable.
With services below the floor, ceilings can stay open, structure can stay exposed and layouts can stay modular.
Gallery
Access floors in offices, a cafeteria and a data center, in wood, terrazzo and laminate finishes. Select any photo to view it full size.
Server rooms · Computer rooms · Data centers
A raised floor gives a server room or computer room a clean path for power and data cabling and, where designed for it, a plenum that delivers cooling air straight to the racks.
More detail: Server room raised floor guide.
Existing floors
LG2 sells replacement access floor panels and repairs existing raised floors, so an older floor can keep working as the room changes.
LG2 · Tate raised floors
From our Grand Rapids office, LG2 supplies and installs Tate raised access floors throughout Michigan and Indiana: offices, data centers and schools from Detroit, Lansing and Grand Rapids to Indianapolis, Fort Wayne and South Bend.
Match the ConCore or All Steel rating to the loads the floor will carry, then choose the understructure, floor height, finish and any airflow panels.
Work with the design team on finished floor height, heavy-load and rolling-load paths, underfloor air, cabling and transitions to adjacent floors.
Set pedestals and stringers, level the grid and lay panels and finishes to Tate's installation guide.
Help with panel moves, cutouts, replacement panels and changes to airflow panels as the space changes.
FAQ
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