Pre engineered and other buildings
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A brief on conventional, pre-fab and pre-engineered buildings is presented.
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Pre engineered and other buildings
- 1. PRE – ENGINEERED BUILDINGS AND THEIR APPLICATIONS Dr K M Soni Chief Engineer, CPWD, Mumbai
- 2. Buildings • CONVENTIONAL BUILDINGS – LOAD BEARING – RCC FRAMED STRUCTURES – STEEL STRUCTURES – COMPOSITE STRUCTURES – SEMI-TEMPORARY/TEMPORARY BUILDINGS • PRE-FABRICATED BUILDINGS • PRE-ENGINEERED BUILDINGS
- 3. Conventional Buildings • CAN BE DESIGNED AND CONSTRUCTED WITH ANY ARCHITECTURAL DESIGN AND FEATURES • SITE CONSTRUCTION AND SUCH DEVIATIONS ARE FEASIBLE • LOCAL MATERIALS AND TECHNIQUES CAN BE APPLIED • NO MONOTONY • NEW MODERN TECHNIQUES
- 4. New Modern Construction Techniques • MONOLITHIC CONSTRUCTION – JUMP SHUTTERING – TUNNEL FORMWORK – ALUMINUM FORMWORK – SHUTTERINGS WITH OTHER MATERIALS – PATENTED TECHNOLOGIES
- 6. Useful and economic for high rise buildings http://www.cityu.edu.hk/CIVCAL/ production/advanced/jump_form .html
- 13. Suitable for repetitive buildings
- 14. Monolithic construction with Aluminium formwork http://www.tectonica-online.com/products/peri/aluminium-formwork- monolithic-concrete-housing-construction/2801/
- 16. Suitable for repetitive buildings http://tacsystem.blogspot.com/2013/01/pic- aluminium-formwork-system.html
- 18. Monolithic Construction • Faster construction • Repetitive construction • Quality controlled • Useful for repetitive work and multistoreyed buildings • Specialised work • Limitations of architectural features, corners etc • Sometimes limit of spans • RCC walls suitable for coastal areas? • Services are to be pre-planned and provided before casting • Providing services after construction difficult • CPWD adopting such technologies
- 19. cpwd.gov.in
- 20. cpwd.gov.in
- 21. cpwd publication
- 22. cpwd publication
- 23. Pre-Fabricated Buildings • CONCRETE BUILDINGS • STEEL BUILDINGS • COMPOSITE STRUCTURES
- 24. Pre-Cast Concrete Buildings • PRE-CAST STRUCTURAL MEMBERS • SLABS, BEAMS, WALLS, STAIRCASES ETC • FACTORY MADE MEMBERS • QUALITY PRODUCTS • FAST CONSTRUCTION • LITTLE CAST IN SITU CONSTRUCTION • SOMETIMES SIZE LIMITATIONS
- 36. Pre-cast Concrete Construction • FASTER CONSTRUCTION • QUALITY CONTROLLED • SUITED FOR INDIVIDUAL AND MASS CONSTRUCTION • SUITED FOR SITES HAVING SPACE CONSTRAINTS • LIMITATION OF ARCHITECTURAL FEATURES • LIMITATIONS OF MODULE SIZES
- 37. Pre-cast Concrete Construction • CPWD has constructed Multi level car parking block for SBI Data centre at Hyderabad in which; • Pre-cast external and internal wall panels, • Pre-cast parapet wall panels, • Pre-cast pre-stressed beams, • Pre-cast hollow core slabs, • Pre-cast staircase, • Pre-cast columns and precast solid slabs for ramp landings are used.
- 38. cpwd publication
- 39. cpwd publication
- 41. Pre-cast Steel Construction • SUITED FOR SITES HAVING SPACE CONSTRAINTS • LARGER MODULES FEASIBLE • QUALITY CONTROL • FASTER CONSTRUCTION • SPECIALISED WORK DUE TO WELDING • FIRE RETARDANT PAINTS/COATINGS TO BE APPLIED • FALSE CEILING REQUIRED
- 43. Pre–engineered Building Pre-engineered building is defined as a building designed to be fabricated using a pre-determined inventory of raw materials and manufacturing methods that can efficiently satisfy design and functional requirements.
- 44. Pre–engineered Building • CUSTOM DESIGNED • FABRICATED IN FACTORY • NO WELDING • ONLY BOLTING
- 46. Comparison Pre-engineered building • Self weight lighter (@30%) • Primary member tapered • Secondary members – light weight rolled Z or C sections • Less erection time and cost Pre fab steel Buildings • Heavier than PEB • Primary member – I sections • Secondary members – I or C sections • More erection time and cost
- 53. Schools
- 56. Reduce construction time Buildings can be constructed in less time compared to others once the design is approved. Foundation and anchor bolts can be cast parallel, ready for the site bolting. This also allows faster occupancy and earlier realization of revenue.
- 57. Low space requirements for storage at site Conventional buildings require a considerable space to store materials during construction for a long time. Since this method reduces the requirements of the materials and space requirement at site, there is a considerable saving on account of the same
- 58. Lower Cost Due to less dead load, well designed economic sections, manufacturing in the factory and time saving in construction, cost saving is feasible though their technical consultancy of design may require some additional expenses
- 59. Expansion Flexibility Buildings can be easily expanded in length by adding additional bays provided future provision of expansion in width is already kept. Also, it is easier to increase the height of the structures.
- 60. Larger Spans Buildings can be made with larger spans without supports in between i.e. without columns. Most of the efficiently used exhibition and convention halls are constructed having column free inside space
- 61. Quality Assurance As components are manufactured completely in the factory under controlled conditions, the quality is assured
- 62. Lower Maintenance Buildings can be manufactured with automotive high quality materials to suit ambient conditions at the site resulting into durability and low maintenance costs.
- 63. Better Seismic Resistance Due to low weight flexible frame, seismic resistance of such structures is high compared to conventional structures.
- 64. Eco-friendly • Steel members are recyclable, hence qualifies for eco-friendly sustainable structures • Do not spread dust • Avoids use of natural materials like aggregates, stones etc.
- 65. Light Weight Foundation As the structures have less dead load, the foundation required is light weight. In case of low bearing capacity of soil also, the structures can be designed as per the requirements.
- 66. Applications • Industrial buildings • Warehouses • Commercial buildings • Showrooms • Offices • Shades and garages • Schools and primary health centres • Stadiums • Exhibition halls and Convention centres • Gas stations • Metro stations, Bus terminals, Railway stations/platforms and Parking lots • Assembly places
- 67. Limitations • Aesthetics • Very limited architectural features • Life of members • Foundation design/erection • Deviations on site, not feasible • Limited to low rise buildings
- 69. Pre-engineered buildings • Are they only metal buildings? Now metallic PEBs, are known as PE metallic buildings • Let us again check the definition. A building designed to be fabricated using a pre- determined inventory of raw materials and manufacturing methods that can efficiently satisfy design and functional requirements • Thus any type of building can be categorised in PEB provided satisfy design and functional requirements and is a fabricated one
- 70. Pre-engineered buildings • Let us review fabricated buildings • Let us consider fabricated means factory made • Thus, let us include pre-fab concrete members in PEB. • Thus, PEB means all buildings in which pre- fab members are used satisfying design and functional requirements.
- 75. So let us go ahead with PEB with wider definition https://www.slideshare.net/Deltasteel/pre-engineered-steel-buildings-38695951 https://www.slideshare.net/ShubhamParab/pre-engineered-building-ppt- rit?next_slideshow=1 https://www.slideshare.net/hlksd/88254718- preengineeredsteelbuildings?next_slideshow=2 https://www.slideshare.net/hlksd/115659118-preengineeredbuildings- 46415466?next_slideshow=1 References