We, the Siam Industrial Wire Co., Ltd. (SIW) , are the manufacturer of Pre-stressed concrete wire, Pre-stressed concrete 7-wire strand, Cold-drawn steel wire and Wire Mesh. Our quality products have been exported to almost 30 countries worldwide. Our company have been accredited by international accreditations and institutes such as ISO 9001: 2000, ISO / IEC 17025, ISO 14001, OHSAS 18001, NATA (National Association of Testing Authorities, Australia) , JIS G3536 (Japanese Industrial Standard) , QDMR (Queensland Department of Main Roads; Australia and etc.With our annual capacity of 60, 000 Mts. For Pre-stressed concrete 7-wire strand, we can assure you of our capability to supply throughout any project completely. We hope that SIW could be considered as of alternative suppliers for your coming project and with our long experience in exporting, you can confide SIW as one of the leading PC Strand exporting companies.