HELA Clothing Bangladesh Ltd

Transcription

1 1 HELA Clothing Bangladesh Ltd Plot No. : 53, 54, 66, 67; Sector 01, Karnaphuli Export Processing Zone, North Patenga, Chittagong ( E, N) 01 July 2014

2 2

3 Steel columns in the Production Building appear to be stressed in excess of normal design limits 3

4 Cursory calculations indicate that the steel column size at ground floor, in particular columns supporting the 440mm build-up toilet zones on the 1st floor plus a full height brick wall, appears to be smaller than required for the applied dead and live load. 4 Column Strength

5 Loose bolts to bracing connections 5

6 Structure consists of steel portal frame building, with stability system provided through cross bracing. 6 Bracing in Portal Frame

7 On inspection, the bolt connections appear to be loose in areas, possibly reducing the effectiveness of the stability system in certain loading conditions. 7 Bracing in Portal Frame

8 Non-Engineered Steel Sheds 8

9 N Dining / Prayer Hall situated east of the main production building. Structure comprises of a steel frame with lightweight steel roof but appears to be non-engineered. 9 Non-Engineered Structures

10 N Additional bamboo supported storage sheds with lightweight steel roof east of the main production building. Structures appear to be non-engineered. 10 Non-Engineered Structures

11 Corrosion to Steelwork 11

12 Water Ingress Some members observed showing signs of corrosion 12 Corrosion to structural steel members observed on ground floor. Water ingress observed on underside of slab above certain members showing signs of corrosion. Corrosion to Steel Members

13 Inconsistencies of Permit Drawings with On-Site 13

14 14 A number of discrepancies on the permit drawings were noted during the inspection. A full bay is missing on the north of the structure. Inconsistencies in Documentation

15 15 The central stairs on the 1 st floor is actually located at the grid line and the proposed walled area does not exist. Inconsistencies in Documentation

16 16 Two additional lift cores were also observed which were not included on the permit drawings. Inconsistencies in Documentation

17 17 Priority Actions

18 Problems Observed ITEM 1: Steel columns on the ground floor, in particular columns supporting the 440mm build-up toilet zones on the 1st floor plus a full height brick wall, appear to be stressed above normal design levels ITEM 2: Loose bolts to bracing connections ITEM 3: Non-engineered steel sheds ITEM 4: Corrosion to steelwork ITEM 5: Inconsistencies of Permit Drawings with on-site observations 18

19 Item No. Observation Recommended Action Plan Recommended Timeline Steel columns on the ground floor, in particular columns supporting the 440mm buildup toilet zones on the 1st structural adequacy of all columns on the ground floor, Building Engineer to provide calculations showing the floor plus a full height brick taking into account the loading layout and as built structure. wall, appear to be stressed above normal design levels Steel columns on the ground floor, in particular columns supporting the 440mm buildup toilet zones on the 1st Verify insitu steel grade of members and exact member dimensions floor plus a full height brick wall, appear to be stressed above normal design levels Steel columns on the ground floor, in particular columns supporting the 440mm buildup toilet zones on the 1st Produce and actively manage a loading plan for all floor plates within production building. floor plus a full height brick wall, appear to be stressed above normal design levels Steel columns on the ground floor, in particular columns supporting the 440mm buildup toilet zones on the 1st Continue to implement loading plans floor plus a full height brick wall, appear to be stressed above normal design levels 6-weeks 6-weeks 6-weeks 6-weeks 19

20 Item No. Observation Recommended Action Plan Recommended Timeline 5 Loose bolts to bracing connections Building Engineer to inspect all bolted connections to cross bracing and prepare a schedule of bolt tightening. 6-weeks 6 Loose bolts to bracing connections Following completion of bolt tightening, Building Engineer to assess all bracing and steel member connections to ensure they are tightened and are consistent with structural design. 6-weeks 7 Non-engineered steel sheds Stability system of non-engineered structures to be analysed by the Building Engineer, and any additional stability system required should be implemented. 6-months 8 Corrosion to steelwork Building Engineer to assess extent of corrosion to steel members and prepare a schedule of remedial works including corrosion protection. 6-months 9 Corrosion to steelwork Building Engineer to supervise remedial works to make good corroded steelwork. 6-months 10 Inconsistencies of permit drawings with on-site observations Building Engineer to assess current construction against structural documentation and produce accurate and complete as built documentation. 6-months 20