Ushamartin manufactures Low Relaxation Pre-stressed Concrete - LRPC Strands. Ushamartin supplies wire rods, bright bars, steel wires, specialty wires, wire ropes, strand, conveyor cord, wire drawing and cable machinery. Low Relaxation Pre-stressed Concrete - LRPC Strands are used in construction industry. Low Relaxation Pre-stressed Concrete - LRPC Strands are used for road, river & railway bridges and flyovers, pre-stressed concrete domes, slabs, silos, hangars, aqueducts, viaducts & railway sleepers.