INTERNATIONAL MATERIAL AND DESIGN STANDARD

1.   Calculations & Production Drawing of Steel Structures

      Standards:                          ASCE 10-97, AISC (ASD & LRFD), EIA/TIA-222-F, EIA/TIA-222-G

      Design Software                Tower version 13.20

      Detailing Software             BOCAD 3 D Version 2.2.1.14

2.   Materials:      Steel Structures 

      Mild Steel                             JIS G3101 SS400, TIS 1227 SS400 or equivalent

      High Strength Steel            JIS G3101 SS540, TIS 1227 SS540, ASTM A572 Gr.50 or equivalent

3.   Bolt, Nut and Washer

      3.1 Inspection Routine          ASTM A6

      3.2 Bolts                                  ASTM A394 Type 0, A325, JIS B1180 B18.2.1 or equivalent

      3.3 Nuts                                   ASTM A394 Type 0, A325, ASTM A563M Gr. A JIS B1181 or equivalent

      3.4 Washers                            ANSI B 18.21.1, JIS B1251 FOR LOCK WASHER or equivalent

                                                        ANSI B 18.22.1, JIS B1256 FOR LOCK WASHER or equivalent

4.   Fabrication & Dimension Inspection     AISC

5.   Welding                            AWS D1.1:2015

6.   Hot Dip Galvanizing       ASTM A123, ISO 1461 FOR STEEL MEMBERS

                                                 ASTM A153 Class C, D FOR BOLTS, NUTS, WASHERS

QUALITY ASSURANCE

It is TSS responsibility to ensure that our products and service meet the customers' requirements. Hence, we establish quality assurance (QA) division which works independently and reports directly to General Manager to control and improve our products and service standard to meet international level.

Today, our quality management system complies with international Standard ISO 9001: 2015 (Design, Fabricate and Galvanize Steel Structures for Transmission Line Towers, Telecommunication Towers, Substation and General Steel Structures) certified by Bureau Veritas Certification with accreditation from UKAS of England and NAC of Thailand.

We also concern environmental impact to neighborhood hence we apply the Environmental Management System which complies with international Standards ISO 14001:2015 certified by Bureau Veritas Certification with accreditation from UKAS of England.

Moreover, we apply an Occupational Health and Safety Management Systems which complies with International Standards ISO 45001:2018 to eliminate or minimize risk in workplace and to improve work performance. ISO 45001 is certified by Bureau Veritas Certification with accreditation from UKAS of England.