02 December 1998
                                    (ADD3) F/S Q3/98
                                    The Company has a policy to charge interest on related party loans based on actual interest cost incurred 
       during the period.
       Consolidated as at September 30, 1998
                                                                                   Issued       Percentage of     Cost     Equity
       Company's name         Type of  Business        Country    Relation     shares capital  shares holding    method    method    Dividend
                                                                                  Baht'000                      Baht'000  Baht'000   Baht'000
Associated companies
HTR Corporation Limited        Real estate              Thailand  Shareholders      500,000          47.6         329,990   276,363       -  
                              development                                                                                      
DKK Sino-Thai Engineering      Telecommunications       Thailand  Shareholders        8,000          35             2,800    29,080      2,800  
Company Limited                and transmission lines                                                                           
ACS Asia Limited               Light steel fabrication  Thailand  Shareholders       10,000          50             5,000     8,986       -  
ACS Asia (1996) Company        Manufacturing cable      Thailand  Shareholders       15,000          50             7,500    15,966       -  
Limited                        support system                                                                                   
Thai Maintenance Contracting   Maintenance service      Thailand  Shareholders       12,315          30             2,340     5,049       -  
Company Limited                for industrial plants                                                                            
MMR Asia Company Limited       Electrical and           Thailand  Shareholders       30,000          30            11,999     3,000       -  
                              instrumentation                                                                                  
                              contractor                                                                                       
                                                                                                                 367,629   338,444      2,800  
Less Allowance for decline in                                                                                                   
investment                                                                                                        (8,986)       -  
Total Investments in                                                                                                            
       Associated Companies                                                                                                329,458      2,800  
                                                                        Issued     Percentage of      Cost     Equity
 Company's name       Type of  Business     Country    Relation     shares capital shares holding    method    method    Dividend
                                                                       Baht'000                     Baht'000  Baht'000   Baht'000
Other related companies
STP&I Public Company   Steel fabrication,    Thailand  Shareholders      250,000         10           75,750        -         -  
Limited                steel construction,                                                           
                      industrial boilers and                                                        
                      pressure vessels                                                              
                      manufacturing                                                                 
Abico Land Company Limited                   Thailand  Shareholders      200,000         15          30,000         -         -  
Nithipat Leasing Company                     Thailand  Shareholders      800,000         15         129,568         -         -  
Limited                                                                                                   
National Insurance Company                   Thailand  Shareholders      300,000         10               -         -         -  
Limited                                                                                                   
National Life Insurance                      Thailand  Shareholders      500,000         10               -         -         -  
Company Limited                                                                                           
Nakornthai Stripment Public                  Thailand  Shareholders    8,600,000       1.85         254,000         -         -  
Company Limited                                                                                           
Peroxy Thai Company Limited                  Thailand  Shareholders      793,000       2.73          21,650         -         -  
Others                                                                                               44,064         
       Total                                                                                       555,032          
Less Allowance for decline in                                                                             
investment                                                                                         (276,019)        
Total Investment in Other       Relate Companies                                                               
       Related Companies                                                                           279,013          
Total Investments                                                                                   608,471          
       Consolidated as at September 30, 1997
                                                                                Issued      Percentage of     Cost     Equity
  Company's name          Type of  Business        Country    Relation     shares capital  shares holding    method    method    Dividend
                                                                               Baht'000                     Baht'000  Baht'000   Baht'000
Associated companies
HTR Corporation Limited    Real estate              Thailand  Shareholders      500,000         47.6         329,990    309,730         -       
                          development                                                                                    
CBI/ST Company Limited     Manufacturing and        Thailand  Shareholders      100,000         35             9,082     11,766    14,006  
                          erection of spherical                                                                          
                          & cylindrical tank                                                                             
STP&I Public Company       Steel fabrication,       Thailand  Shareholders      250,000         24            59,999    196,605         -  
Limited                    steel construction,                                                                            
                          industrial boilers and                                                                         
                          pressure vessels                                                                               
                          Manufacturing                                                                                  
DKK Sino-Thai Engineering  Telecommunications       Thailand  Shareholders        8,000           35          2,800      25,537      2,800   
Company Limited            And transmission lines                                                                         
ACS Asia Limited           Light steel fabrication  Thailand  Shareholders       10,000          50           5,000       8,228          -  
ACS Asia (1996) Company    Manufacturing cable      Thailand  Shareholders       15,000          50           7,500       7,500          -  
Limited                    support system                                                                                 
                                                                               Issued       Percentage of     Cost       Equity
  Company's name             Type of  Business      Country    Relation     shares capital  shares holding    method     method    Dividend
                                                                              Baht'000                       Baht'000   Baht'000   Baht'000
Associated companies
MMR Asia Company Limited      Electrical and         Thailand  Shareholders      30,000            30          11,999      11,999         -  
                             instrumentation                                                                               
                             contractor                                                                                    
Thai Maintenance Contracting  Maintenance service    Thailand  Shareholders      12,315            30           2,340       2,340         -  
Company Limited               for industrial plants                                                                         
Total  Investments in                                                                                                       
       Associated Companies                                                                                  428,710     573,705    16,806  
Other related companies
Abico Land Company Limited                           Thailand  Shareholders     200,000            15          30,000           -         -  
Nithipat Leasing Company                             Thailand  Shareholders     800,000            15         129,568           -         -  
Limited                                                                                       
National Insurance Company                           Thailand  Shareholders     300,000            10          30,000           -         -  
Limited                                                                                       
National Life Insurance                              Thailand  Shareholders     500,000            10          50,000            
Company Limited                                                                               
Nakornthai Stripmill Public                          Thailand  Shareholders   5,600,000           3.01        270,000          -          -  
Company Limited                                                                               
Peroxy Thai Company Limited                          Thailand  Shareholders     793,000           2.73         21,650          -          -  
Others                                               Thailand  Shareholders                                   119,565          -          -  
                                                                                                             650,783           
Less Allowance for decline in                                                                 
Investment                                                                                                    (31,067)         
Total Investments in                                                                          
       Related Companies                                                                                     619,716        
Total Investments                                                                                           1,193,421         
       Loans to
                                                Amount in thousand Baht         Policy for charging
                                                        1998    1997            interest on loans       
       Associated companies
       MMR Asia Company Limited                       20,363  14,500                   17%     
       Thai Maintenance Contracting Company Limited   13,000       -                   18%     
       ACS Asia (1996) Company Limited                 5,094   5,094                 14.75%  
       Total                                          38,457  19,594          
       Joint Venture
       Philipp Holzmann (Thai) /U.T.M. Engineering /                  
          Sino-Thai Joint Venture                     89,454       -                   15%  
                                                 Amount in thousand Baht        Policy for charging
                                                        1998    1997            interest on loans      
       Other related companies
       Others                                          4,240     4,240               13-18%  
       Less Allowance for doubtful accounts              (90)        -          
                                                       4,150     4,240          
       Total Loans                                   132,061    23,834          
       The Company has a policy to charge interest on related party loans based on actual interest cost incurred 
       during the period.
       The Company recorded deficit in shareholders' equity of subsidiary and joint venture amounting to                    
       approximately Baht 80.08 million, which was shown under other liabilities.
       At September 30, 1997, investment in non-current marketable securities are stated at cost which is excess of 
       the aggregate market value of Baht 203.75 million.  The company did not record unrealized holding loss on 
       such investments in the shareholders' equity.
       The Company recorded investments in associated companies by using the equity method in the financial 
       statements for the three-month period and nine-month period ended September 30, 1998 on the basis of the 
       financial information obtained from the management which had not been audited or reviewed by the auditors 
       in accordance with standards established by the Thai Institute of Certified Accountants and Auditors of 
       Thailand for the recording of investments in associated companies.
       The Company recorded investments in subsidiaries and associated companies by using the equity method in 
       the financial statements for the three-month period and nine-month period ended September 30, 1997 on the 
       basis of the financial information obtained from the management which had not been audited or                       
       reviewed by the auditors in accordance with standards established by the Thai Institute of Certified                     
       Accountants and Auditors of Thailand for the recording of investments in subsidiaries and associated 
       companies. 
       In 1996 and 1995, an associated company increased its registered share capital of which the whole amounts 
       were issued to the new shareholders, resulting in the increase of the Company's equity in that company in the 
       amount of Baht 43.12 million and Baht 25.71 million respectively. These excess of book value over cost of 
       investment are shown as non-current liabilities in the financial statements.
       In 1998, the Company sold out the investment  in associated company and recorded the whole exceeding in 
       amount of book value over cost of investment as revenue in the financial statements.
       5.2     Due from related companies are summarized as follows:
       (Amounts in thousand Baht)                       CONSOLIDATED           THE COMPANY     
                                                        1998    1997           1998    1997
       Subsidiaries
       Sino-Thai Construction Services Company Limited     -       -          4,644   1,349  
       Sino-Thai Resources Development Public                               
          Company Limited                                  -       -             18       -  
       Total                                               -       -          4,662   1,349  
       Associated companies
       STP&I Public Company Limited                       -  34,108               -  32,606  
       CBI/ST Company Limited                             -     155               -     155  
       ACS Asia Limited                                  12      12              12      12  
       ACS Asia (1996) Company Limited                1,811   1,060           1,811   1,060  
       MMR Asia Company Limited                       6,962   1,766           6,474   1,693  
       Thai Maintenance Contracting Company Limited     715  55,795             715  55,795  
                                                      9,500  92,896           9,012  91,321  
       Joint ventures
       Philipp Holzmann (Thai) /U.T.M. Engineering /                                                                                
          Sino-Thai Joint Venture                    39,956   1,999          39,956   1,999  
       Zueblin - W&F - Stecon joint venture           4,796   5,486           4,796   5,486  
       The Joint Venture of Tomen Enterprise (Bangkok)            
       Company Limited/Sino-Thai Engineering and                              
       Construction Public Company Limited/                                   
       Totems Company Limited                           587       -             587       -
                                                     45,339   7,485          45,339   7,485
      Other related companies                         2,547   3,045           2,547   3,045
      Total                                          57,386 103,426          61,560 103,200
       5.3     Due to related companies are summarized as follows:
       (Amounts in thousand Baht)                      CONSOLIDATED      THE COMPANY     
                                                       1998     1997    1998    1997
       Subsidiaries
       Sino-Thai Construction Services Company Limited    -        -    1,301    900  
       Sino-Thai Resources Development Public                                 
          Company Limited                                 -        -        8  5,000  
       Total                                              -        -    1,309  5,900  
       (Amounts in thousand Baht)                      CONSOLIDATED      THE COMPANY     
                                                       1998     1997    1998    1997
       Associated companies
       STP&I Public Company Limited                       -    1,820       -      41  
       HTR Corporation  Limited                         217    1,021     217   1,021  
       ACS Asia Limited                                  96       76      96      76  
       MMR Asia Company Limited                         409      409     409     409  
       Thai Maintenance Contracting Company Limited       -   26,540       -  26,540  
       Total                                            722   29,866     722  28,087  
       Other related companies                        3,790    3,790   3,790   3,790  
       Total                                          4,512   33,656   5,821  37,777  
       5.4     Due from related companies are overdue according to  the following aging analysis:
       (Amounts in thousand Baht)               CONSOLIDATED         THE COMPANY     
                                               1998      1997       1998      1997
       5 months to 12 months                  3,034    56,415      2,546    56,393  
       Over 12 months                         9,570         -      2,438         -           
               Total                         12,604    56,415      4,984    56,393  
       5.5     The company significant transactions with its related companies for the nine-month periods ended        
               September 30, are as follows:
        (Amounts in thousand Baht)               CONSOLIDATED         THE COMPANY     
                                               1998      1997       1998      1997
       Revenues from construction                 -   115,526          -   115,526  
       Revenues from services, rent and others    -        40      1,207     1,536  
       Interest income                            -         -      7,097     5,409  
       Equipment purchase                         -         -      1,562     3,124  
       Concrete service and others                -         -      1,299       748  
NOTE 6 - CASH AND CASH EQUIVALENTS 
       Cash and cash equivalents as at September 30, 1998 are summarized as follows:
                                       CONSOLIDATED    THE COMPANY
       (Amounts in thousand Baht)
       Cash in hand and at banks          642,773        613,663  
       Less Bank overdrafts              (220,547)      (160,533) 
       Cash and cash equivalents - net    422,226        453,130  
NOTE 7 - ACCOUNTS RECEIVABLE 
       Accounts receivable at September 30 are summarized as follows:
       (Amounts in thousand Baht)                         CONSOLIDATED               THE COMPANY     
                                                       1998          1997         1998         1997
       Accounts receivable                          977,803     1,610,531      891,364     1,421,084  
       Unbilled works on construction contracts     499,543       583,669      499,543       583,669  
       Total                                      1,477,346     2,194,200    1,390,907     2,004,753  
       Less Allowance for doubtful accounts        (199,042)      (39,114)    (187,262)      (35,385) 
       Accounts receivable - net                  1,278,304     2,155,086    1,203,645     1,969,368  
       Accounts receivable are overdue according to the following aging analysis :
       (Amounts in thousand Baht)                  CONSOLIDATED         THE COMPANY     
                                                   1998     1997       1998     1997
       5 months to 12 months                    224,858  122,528    181,733  106,094  
       over 12 months                           229,922  132,422    204,962  125,083  
       Total                                    454,780  254,950    386,695  231,177  
NOTE 8 - LOSS ON CHANGE IN CURRENCY EXCHANGE SYSTEM TO A MANAGEMENT FLOAT
        SYSTEM 
       At September 30, 1997,  the parent company and subsidiary have shown the effects of the change in the 
       currency exchange system to a Managed Float System amounting to Baht 945 million and Baht 93 million 
       respectively in the statements of income. 
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