Post-Tension Cable

NATIONWIDE SUPPLY NETWORK

Four PTI-certified facilities
In-house engineering services

Charlotte, NC

1200 Metropolitan Ave., Charlotte, NC

Charlotte, NC

1 million feet of CMC cable lending strength to luxury apartment tower in downtown Charlotte, NC.

Engineered compression. Built-in confidence.

Post-tensioning improves concrete performance by applying compressive forces through high-strength steel tendons—reducing cracking, controlling deflection, and enabling longer, more efficient spans. It’s a proven solution for slab-on-grade foundations, elevated decks, parking structures, and commercial construction.

CMC fabricates unbonded post-tension cable systems designed for precision, reliability, and jobsite efficiency. Each tendon features a seven-wire strand encased in a protective sheath and anchored after curing to create a durable, tensioned reinforcement system. Our PTI-certified facilities ensure consistent quality and dependable supply.

Why CMC Cable

Engineered support from day one

Our dedicated in-house engineering team supports delegated and full PT system design, layout drawings, sequencing, and value engineering. We help reduce coordination issues before they reach the field—so your project stays on track.

Integrated rebar and PT solutions

With the ability to bundle reinforcing steel and post-tension cable packages, CMC simplifies procurement and streamlines jobsite coordination. One partner. One schedule. Greater efficiency.

Reliable supply, regional strength

PTI-certified fabrication facilities and a growing regional footprint ensure dependable production and delivery. From slab-on-grade foundations to large elevated decks, we scale to meet your demand.

Flexible service models

Whether you need supply-only tendon delivery or a full supply-and-install solution, our team adapts to your project structure, geography, and crew capabilities.

Problem-solving beyond the cable

When challenges arise, our expertise extends beyond materials. With deep experience in structural performance and restoration, CMC is a trusted resource when precision and accountability matter most.

HOW IT WORKS

1

Steel cables are installed

cables placed inside


Before concrete is poured, high-strength steel cables (tendons) are placed inside the slab or beam. At this stage, they are not under tension.

2

Concrete is poured

cables placed inside


Concrete is poured around the loose cables, just like in a normal slab with rebar. The concrete hardens and gains strength.

3

Cables are post-tensioned
(stretched)

cables placed inside


After the concrete gains strength, hydraulic jacks stretch the cable and anchors lock them in place. The cables naturally want to shorten, but they are restrained.

4

Compression is created 
inside the concrete

cables placed inside


Because the cables are trying to contract, they compress the concrete. This creates internal compression forces that counteract tension from loads, reduces cracking and increases load-carrying capacity. Concrete is very strong in compression but weak in tension — PT takes advantage of this.

POST-TENSION SYSTEMS

Leveraging the latest extrusion technology, our tendons boast high-density, abrasion-resistant polyethylene sheathing. All unbonded post-tension tendons are fabricated per our PTI Certified Plants’ governing ASTM and PTI Standards.