STAINLESS INDIA - Indian Stainless Steel Development Association

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Stainless steel roofing system executed atKhalsa Heritage Complex – Anandpur Sahib, India.Finished roof of the auditorium at KHCCurrently under construction on a 100 acre site, the complex hasbeen conceived as two functionally integrated sets of buildings toserve as a cultural museum for exhibiting the rich heritage of theSikhs. Once completed, the KHALSA HERITAGE COMPLEX (KHC)will probably be the world’s biggest cultural and historical museumdedicated to a community.As a counterpoint to the rich tradition of domes which crown sacredSikh buildings, the roofs of the Khalsa museum are carved out inshapes like great receptors facing the sky. Sheathed with silverystainless steel, they reflect the light towards the Gurudwara and thefort. At night these roofs would be floodlit and form a visual triangularaxis with the illuminated fort and Gurudwara domes. Timelessness,according to the principal architect Mr. Moshe Safdie, is perhapsthe most meaningful quality one can ascribe to a building. Thismuseum shall stand apart forever- unique, mystical and eternal.The stainless steel roof has been installed over an area of 3750sq.meters, the largest ever stainless steel roofing being executed inIndia. The roof has been designed to stand for 100 years and hasbeen erected over an existing RCC roof slab. The project is beingexecuted by M/s Sreevatsa Stainless Steel Fabricators (P) Ltd, aChennai based firm in technical collaboration with M/s ChadwickTechnology Pty Ltd, Australia-world leaders in the installation ofexpansive roofing systems. The project is in the final stages ofcompletion.The design has addressed all the issues like extreme variations intemperature, heavy rainfall, thermal and lateral movements due tonatural causes like heat and earthquakes. The latest technologyhas been exploited to achieve the complex geometry of doublecurvatures in the roof profile. The task of execution is being carriedout by group of committed engineers and craftsmen staying fulltimeat site for the past 8 months. A total of 60 tonnes of stainless steelhas been utilized in the project.Metal RoofThe roof panels have been fabricated out of stainless steel 304grade, hammer tone finish. A total of 30 tonnes of SS hammer tonefinish has been supplied by M/s Steel Authority of India Limited,Salem Steel Plant. The thickness is 0.63 mm with a protectivecoating. The roof panels have been profiled to achieve the complexgeometry of double curvature using the latest CNC machines anddesign software.There has been a total of around 3000 roof panels of 3500 mmlength of which , each panel has been designed using the latest 3Dmodelling software and have been formed on CNC sheet metalshop. The roof design has been conceptualised by M/s ChadwickTechnology Pty Ltd, Australia. The standing seam system has beencustomised to the required geometry. The standing seam has beencovered with a triangular shaped roll formed batten cap for theaesthetic purpose. The concept has been transformed into realityby M/s Sreevatsa Stainless Steel Fabricators (P) Ltd , Chennai.Support and Anchorage SystemsMetal panel systems are engineered to support gravity, seismic andwind loading. The fastening of the panels also needs toaccommodate inter-storey drift requirements in seismic zones. Thesupport system of the panels have been critically designed andaccurately fabricated to accommodate the unavoidable hugetolerance in casting the RCC roof slabs of complex geometry.STAINLESS INDIA / VOL.12, NO.4/ 4KHC contd. on page 5 >>
KHC contd. from page 4The project has also used more than 30 tonnes of stainless steelmaterial for base structure such as brackets, purlins, cleats, clampsetc. Mill finished stainless steel material of various thicknesses, asstipulated by the structural design has been used. All stainless steelanchor fasteners have been supplied by M/s Hilti India.Joints and Joint Detailing: Since metal is impervious to water,panel joint design is critical to the water tightness of the system. Ametal panel building typically has an extensive number of joints.How the joints perform is a factor of the panel design andconstruction. In this project a system similar to the rain screen ordrainage system has been used with a standing seam for bothperformance characteristics and the aesthetic criteria of unsealedjoints.Compared to concrete or masonry cladding elements, metal panelsystems have higher coefficients of expansion for thermal movement.Designers of metal panel systems need to calculate the expectedmovement of metal panels due to changes of temperature.also establish the panel performance criteria. Performance criterianeeded include wind loading, seismic design criteria, deflectioncriteria, air infiltration criteria, thermal movement criteria,performance testing criteria, insulation criteria and performancecriteria for air and moisture barrier or rain screen.M/s Moshe Safdie Associates from USA- the clients’ architects, theirIndian counterpart M/s Ashok Dhawan, M/s L & T Limited, the Indianmultinational in construction industry and M/s Chadwick TechnologyPty Ltd, Australia, the world renowned roofing specialists – Allcolossal brains in the respective fields have joined together in thisprojects. That Sreevatsa Stainless Steel Fabricators (P) Ltd, fromthe southern tip of this great country, also had a substantial role toplay in this prestigious heritage project is due to the cooperationextended to us by the above great players and not the least TheAnandpur Sahib Foundation, Govt. of Punjab.An artist’s impression of the Khalsa Heritage ComplexCloser view of the stainless steel roofing of the auditoriumInsulation: With the exception of insulated metal panels, metalpanels do not typically provide any insulation value to wall systems.When non-insulated metal panels are used, the insulation is typicallyprovided. In this project rock wool insulation of 75 mm thicknesshas been provided.Air and Moisture Barrier: While face sealed systems do not requirean air and moisture barrier, drainage and rain-screen metal paneltypically require a secondary air and moisture barrier system. Theselection of the air and moisture barrier is an important decisionthat needs to be customized to the specific nature of the metal panelsystem, the exterior sheathing, geometry, and HVAC requirementsof the building. This project has a layer of EPDM placed immediatelybelow the roof panels to act as the second defence of water proofingand a layer of Bituthene Membrane, supplied by M/s W.R. Graceand Co. This acts as an air vapour barrier.Metal Panel DesignAs part of the design, the architects had selected a type of metalpanel system and provided architectural details that depict therelationship of the metal panel system to the adjacent buildingsystems.The designers M/s Chadwick Technology Pty Ltd, Australia haveselected the types of metal panels that will meet design criteria andWork in progress at the main structure at KHCContact : Mr CC Sampath, Sreevatsa Stainless Steel Fabricators(P) Ltd, 1/376 Mugaliwakkam, Porur, Chennai 600 017.Tel : +91-44-22523469 , +91-44-22523479,Fax: +91-44-22523489,+91-44-28143552,Email: sreevatsa.stainless@gmail.com,Web: www.sreevatsastainless.comSTAINLESS INDIA / VOL.12, NO.4/ 5
Page 2: Innovation contd. from page 1first
Page 7 and 8: Wider flat products available from
Page 9 and 10: Welcoming New MembersELG HANIEL GRO
Page 11 and 12: Ozone contd. from page 10Patch Fitt

STAINLESS INDIA - Indian Stainless Steel Development Association

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