Pre - Engineer Building
1. Window
2. intermediate frame: rafter
3. Purlin
4. Intermediate frame: Column
5. Roof Panel
6. Parapet.
7. Intermediate frame: rafter
8. Girt
9. Crane beams and rails
10. Wind bracing
11. Ridge Vent
12. Intermediate frame; rafter
13. Single door
14. Roll-up-door
An ARCHNA building includes:
1. All-primary and secondary framing.
2. All connections.
3. Choice of 2 roof systems.
4. Choice of 3 wall systems.
5. All fixings.
6. All sealants for weather-proofing.
7. Thermal or Acoustic insulation.
8. Liner panels.
9. Flashings.
10. Integrated accessories
11. Crane beams and rails.
12. Mezzanine floors.

 

ARCHNA building provides:

  • Easy integration of all traditional construction materials such as brick work, glazing, timber etc.
  • Optimization in accordance with customer's requirements.
  • Addition of canopies as a direct continuation of the roof line or at a lower level with positive or negative roof slopes.
  • Addition of parapets, partially or completely around the building.
  • Optimized design of steel thereby reducing weight, while meeting all design criteria requirements.
  • Quality design, manufacturing and erection.
BUILDING NOMENCLATURE

Archna Pre-engineering Buildings are custom-designed to meet your exact requirements. The basic parameters that define a Pre-engineered Building are:

Building Width
Building width is defined as a distance from outside of eave strut of one side wall to outside of eave strut of the opposite side wall.

Building Length
This is defined as a distance between the outside flanges of end wall columns in opposite end walls and is a combination of several bay lengths.

End Bay Length
End bay length is the distance from outside of the outer flange of end wall columns to center line of the first interior frame column.

End Bay Length
End bay length is the distance from outside of the outer flange of end wall columns to center line of the first interior frame column.

Interior Bay Length
This is the distance between the center line of two adjacent interior main frame columns. The most common bay spacings are 6m, 7.5 m and 9m. Bay lengths up to 15 m are possible.

Building Height

Building height is the eave height which usually is the distance from the bottom of the main frame column base plate to the top outer point of the eave strut. Eave heights up to 30 m are possible. When columns are recessed or elevated from finished floor, eave height is the distance from finished floor, eave height is the distance from finished floor to top of eave strut.

Roof Slope (X/10)
This is the angle of the roof with respect to the horizontal. The most common roof slope is 1/10. However, any practical roof slope is possible.

Design Loads
Unless otherwise specified, Interarch Pre-engineered Buildings are designed fro the following minimum loads:
Roof Live Load: 0.61 kN/m2
Design wind speed: As per IS:875 for 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 Archna Pre-engineering Buildings unless otherwise requested at the time of quotation.


Building Height
Building height is the eave height which usually is the distance from the bottom of the main frame column base plate to the top outer point of the eave strut. Eave heights up to 30 m are possible. When columns are recessed or elevated from finished floor, eave height is the distance from finished floor, eave height is the distance from finished floor to top of eave strut.

Roof Slope (X/10}
This is the angle of the roof with respect to the horizontal. The most common roof slope is 1/10. However, any practical roof slope is possible.

Design Loads
Unless otherwise specified, Pre-engineered Buildings are designed fro the following minimum loads:
Roof Live Load: 0.61 kN/m2
Design wind speed: As per IS:875 for 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 Archna Pre-engineering Buildings unless otherwise requested at the time of quotation.

Clean span Single Slope with Straight Columns
Primary framing consists of all structural elements which transfer loads to the foundations and comprises:
Intermediate frames
Endwall frames
Wind bracings
Crane braclets
Mezzanine beams and joists
Primary framing is manufactured such that only bolted connections are required.

Intermediate Frames

Intermediate frames consist of built-up welded members. For multispan frames, intermediate columns are either pipe sections, hot-rolled profiles or built-up welded profiles, Frames are complemented by flange bracing, connection bolts and anchor bolts. Column bases are usually pined. Fixed connections, if required as per design, can also be provided.

Endwall Frames
Endwall frames consists of either built-up welded, hot-rolled or cold-rolled columns which support a cold-formed or hot-rolled rafter. Frames are complemented by connection bolts, anchor bolts and wind bracing, if required,

Wind Bracing
Wind bracing provided longitudinal stability for the building. It consists of cross bracing located in the roof and side walls in one or more bays depending on loading and the length of the building, When required, cross bracings can be replaced by wind portal frames or by fixed base wind columns located adjacent and connected to the main frame columns.


Wind Bracing
Wind bracing provided longitudinal stability for the building. It consists of cross bracing located in the roof and side walls in one or more bays depending on loading and the length of the building. When required, cross bracings can be replaced by wind portal frames or by fixed base wind columns located adjacent and connected to the main frame columns.

Crane Brackets
Crane brackets support the crane beams and are fixed to the column flanges.

SECONDARY FRAMING
Secondary Framing consists of elements which support the roof and wall sheeting and transfer loads »the primary
framing,

These includes Roof purlins and Wall Girts, Eave Struts, Clips etc.

Roof Purlins

Roof Purlins are cold-formed Z profiles, normally 200 to 300 mm deep out of 1,75 to 2. mm thick steel. These are fixed to the top flanges of the rafters by means of clips bolted to the rafters and the purlin web bolted to the clips. Purlin ends are over-lapped to act as continuous beams.

Wall Girts
Wall girts are cold formed Z sections, normally 200 to 300 mm deep out of 1.75 to 2. mm thick steel. These are fixed to the outer flange of the side wall columns. There are two types of fixations.

  • Fixed to the outer flange of the side wall columns by means of clips bolted to the columns and girt web bolted to the clips. Overlap connections are provided for continuous beam action
  • End wall girts and flush girts on side wallls are normally flushed to the outer flange of the columns by means of clips bolted to the column web and girt web bolted to the clips.
Eave Strut
Even struts are C profiles or double Z profiles, normally 200 to 300 mm deep out 2 and 2. mm thick steel. These are fixed to the outer flange of the side wall columns by means of clips bolted to the column and eve strut bottom flange bolted to the clip. Roof purlins also act as wind struts and enable transfer of strut loads to the side wall columns through adequate bracing.

Cranes in Building

Archna Pre-engineering Buildings can be designed to accept most types of crane systems such as EOT, Monorai! and Under-hung cranes and other load carrying devices like conveyors etc. in both clear-span and multi-span buildings. When a crane system is to be integrated. Archna scope is limited to brackets and crane runway beams which support the crane system. Complete information on the crane system is required in order to design and estimate buildings with cranes.

Mezzanines in Buildings

Intermediate mazzanine floors are possible in metal buildings. Mazzanine floors can be provided in complete or partial area in Pre-engineered Buildings to suit loading requirements for office and storage. Mezanine floors consist of steel decks, supported by joists framed to the mezzanine beams. Main mezzaine beams normally run across the width of the building and are located under the main rafters while joists run parallel to the length of the building. The top flange of the joists fits immediately below the top flange of the mezzanine beam. The economy of the mezzanine floor is affected by the applied loads and support column spacings. Multi-level equipment platforms, catwalks, stair cases etc. can be accommodated, if complete date is available.
 
 
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