Pre Engineered Buildings
INTRODUCTION
Incepted in the year 1986, Navratan Group, commenced operations in the field of manufacturing & marketing of ERW Black and GI pipes & profiles for various applications in varied industry segments. The enterprise has been certified for ISO 9001 Certification for “Quality Management System”. The group ventured into the field of manufacturing & marketing high quality Pre-Engineered Metal Buildings alongwith pre-painted roofings, claddings, cold form “Z” & “C” profiles and accessories.ABOUT THE PRODUCT NAVSTAR
Pre-Engineered Metal Buildings are tailor-made solutions to a customer’s needs and are custom designed to meet exact requirements. These buildings are flexible enough to suit different building dimensions; they are easily expandable, can withstand harsh climatic conditions and come with maintenance free exteriors. Pre-Engineered Metal Buildings are suitable for both, industrial and commercial operations. Warehouses, factories, aircraft hangers, cold storages, workshops, sports halls, supermarkets or any high-rise building; NAVSTAR Pre-Engineered Metal Buildings offer modern solutions to all building constructions.MANUFACTURING FACILITY
We have a state-of-the-art manufacturing facility having manufacturing capacity in excess of 80,000 MT per annum for pipes and structural steel and over 20,000 MT per annum for roofing & cladding systems. We have complete solutions for production and shipment of heavy structures. At our in-house production unit, all work from concept designing to finalization is taken care with ease. With modern technology and machinery, our set-up enables us to undertake complex and/or bulk operations very efficiently. The manufacturing facility is located in RIICO industrial area at Khushkhera, (Rajasthan).Main Frame
Primary Member
Column
Rafter
Secondary Members
Purlin
Girt
Sheeting
Roof
Wall
Fascias
Accessories
Ventilators
Sky Lights
Miscellaneous
TECHNICAL DETAILS
Basic Building Parameters
BUILDING NOMENCLATURE
NAVSTAR pre-engineered metal buildings are custom designed to meet your exact requirements. The basic parameters that define a pre-engineered metal building are:
Building Width
Building width is defined as the distance between the outer side of an eave strut of one side wall to the
outer side of an eave strut of the opposite side wall.
Building Length
This is defined as the distance between the outside flanges of endwall columns in the opposite
endwalls, and is a combination of several bay lengths.
End Bay Length
This is the distance from the outer side of the outer flange of endwall columns to centre line of the first
interior main frame column.
Interior
Bay Length
This is the distance between the centre line of two adjacent interior main frame columns. The most
common bay spacings are 6m, 7.5m and 9m. The bay lengths can go up to 12m.
Building Height
Building height is the eave height, which is usually the distance from the bottom of the mainframe
column base plate to the top outer point of the eave strut. Eave height can go up to 30m. When columns
are recessed or elevated from finish floor, eave height is the distance from finished floor to the top of the
eave strut.
Roof Slope (x/10)
This is the angle of the roof with respect to the horizontal base. The most common roof slope is 1/10.
However, any practical roof slope is possible.
Design Loads
Unless otherwise specified, NAVSTAR pre-engineered metal buildings are designed for the following
minimum loads:
Roof Live Load: 0.57 KN/m2
Design Wind Speed: As per IS:875 for given site location
Design for Seismic loads, collateral loads or any other local conditions must be specified at the time of
quotation.
Loads are applied in accordance with the latest American Codes and Standards applicable to pre
engineered metal buildings unless otherwise requested at the time of quotation
ENGINEERING STRENGTHS
NAVSTAR’s engineering strength help convert complex and expansive conventional steel buildings into simpler and economical pre-designed, pre-engineered metal buildings without sacrificing utility and functional requirements. The company has, with the use of specialized software packages and custom developed analysis, computerized the entire engineering process. Design calculations are comprehensive and the explanations are furnished to enable the consultants in understanding the design of a NAVSTAR Pre-Engineered Metal Building.INTERNATIONAL STANDARDS
NAVSTAR’s Pre-Engineered Metal Buildings are custom-designed solutions to meet the needs of the customer. All buildings are designed and constructed in accordance with the latest editions of the following codes:- Low-Rise Building Systems Manual (MBMA) – Metal Building Manufacturers Association, USA
- Manual for Steel Construction, Allowable Stress Design (AISC) – American Institute of Steel Construction, USA
- Cold-Formed Steel Design Manual (AISI) – American Iron and Steel Institute, USA
- IS 800:2007
- IS 875:1987 (Part:III)
- IS 1893:2002 NAVSTAR pre-engineered metal buildings design and manufacturing confirms to all Indian and International Building Codes
PRIMARY FRAMING SYSTEMS
The most common primary framing systems are shown below. All are shown symmetrical about the ridge line. Framing system asymmetrical about the ridge line and Multispan Framing System with unequal width modules are possible but may require more engineering time and probable longer deliveries. Practically any frame geometry is possible. Consult a NAVSTAR engineer for your specific requirements.
STRUCTURAL SUB SYSTEMS
SECONDARY FRAMING SYSTEMS
Secondary framing consists of elements which support the roof and wall sheeting and transfer load to primary framing system. These include roof purlins, wall girts, eave struts, clips etc.Roof Purlins
Roof purlins are cold-formed Z profiles, normally 200 to 250mm deep manufactured out of 1.50 to 3.00mm thick steel. These are fixed to the top flanges of rafters by means of clips bolted to rafters.Wall Girts
Wall girts are cold-formed Z profiles, normally 200 to 250mm deep manufactured out of 1.50 to 3.00mm thick steel. These are fixed to the outer flange of the sidewall columns.Eave Struts
Eave struts are C profiles or double Z profiles, normally 200 to 250mm deep manufactured out of 2.00 to 3.00mm thick steel. These are fixed to the outer flange of the sidewall columns by means of clips bolted to columns
CRANES IN PRE-ENGINEERED METAL BUILDINGS
MEZZANINE SYSTEMS IN PRE-ENGINEERED METAL BUILDINGS
Intermediate mezzanine floors are possible in metal buildings. Mezzanine floors can be provided for complete or partial area in pre engineered metal buildings to suit loading requirements for office and/or storage. Mezzanine floor consists of steel decks, supported by joists bolted to the mezzanine beams. The economy of the mezzanine floor is affected by the applied load and support column spacings. Multi level equipment platforms, catwalks, staircases etc. can be accommodated, if complete data is provided at the time of estimation. (Consult NAVSTAR for advice on the most economical Mezzanine design.)
