Low Relaxation Pre- Stressed Concrete Uncoated 7- Wire StrandSIW PC Strands have been granted the Thai Industrial Standard, TIS 420 by the Ministry of Industry and are manufactured in accordance with AS/ NZS 4672 , ASTM A416A, BS 5896, JIS G 3536 and pr EN 10138- 3. SIW also produces special- grade products according to customers requirementsMajor applicationsPre- stressed concrete GirdersBonded post- tensioned flooring systemsHollow- core slabsGround and Rock anchors
