Applications

Wherever spans get long.

Post-tensioning (pre-stressing) has taken over from conventional methods in bridges, buildings, metro rails, flyovers and tunnels. The AT anchorage is the piece that makes it hold.

Bridges

Post-tensioned box girders and segmental decks spanning rivers, valleys and rail corridors.

Internal draped tendons in balanced-cantilever and span-by-span box girders; 12 AT 15 and 19 AT 13 heads at the pier segments and closure pours.

Buildings

Flat slabs and transfer girders with longer spans, thinner sections and fewer columns.

Slab thickness reduced by 25 to 35% against reinforced concrete; 4 AT 13 and 7 AT 13 heads on slab-edge pockets and heavy transfer elements.

Metro Rails

Elevated viaducts and U-girders built fast over live city streets with pre-cast segments.

Precast U-girders and segmental viaducts stressed in the yard and on the launching gantry; 12 AT 13 heads for typical 25 to 31 m spans.

Flyovers

Urban grade separators where clearance, speed of erection and slender piers matter.

Continuous box and voided-slab decks over single-column piers; tendons stressed from both ends to control friction on curved alignments.

Tunnels

Pre-stressed linings and portals resisting ground pressure over long service lives.

Post-tensioned cut-and-cover roofs, portals and segmental linings where crack control governs durability.

Also specified in

Tanks & Reservoirs

Circumferential tendons keep LNG, water and wastewater tanks in compression and leak-tight.

Silos & Industrial

Cement and clinker silos, wind-turbine towers and containment structures.

Precast Yards

Pre-tensioned I and U girders, sleepers and segments cast on long-line beds.

Longer spans

Fewer piers, fewer foundations, less land take.

Slender sections

Pre-compression keeps concrete uncracked under service load.

Faster erection

Pre-cast segments stressed in place, over live traffic.

Durability

No tension cracks means less water ingress and longer life.

Which anchorage for which structure.

The tendon force sets the model. These are the AT anchorages typically specified on each structure type; your designer's tendon schedule decides the final choice.

Structure	Typical AT models	Where
Bridges	12 AT 15, 19 AT 13	Box girders, pier segments, closure pours
Metro viaducts	12 AT 13	Precast U-girders, 25 to 31 m spans
Buildings	4 AT 13, 7 AT 13	Slab edges, transfer girders
Pier caps	12 to 19 strands of 15.2 mm	Cantilever caps, stressed from the end faces

Flyovers, tunnels, tanks, silos and precast yards use the same five models, sized to the design force. Every anchorage ships with its anchor cone, wedges, spiral reinforcement and HDPE duct. TYROS crews also stress them on site, as on the Okha railway bridge, Gujarat (see our post-tensioning stressing services).

Send us the tendon schedule. We'll send back the anchorage.

Anchorage specifications, anti-burst reinforcement details and the stressing methodology — for every contractor, on every job.

Get a quote Download-ready specs

Need the tendons stressed too? See our post-tensioning stressing services.