main components.docx

8/18/2019 Main Components.docx

1/8

Main Components

There are following major components in a pre-

engineered building:• Primary or Main frame

• Gable End framing or Wind columns

• Secondary frame or Purlins girts etc!

• "oof # Wall Sheeting

• $racing system

• %rane system

• Me&&anine system

• 'nsulations

• (ttachments li)e canopies fascia etc

• *oors Windows +entilators

• (ccessories li)e Turbo ,ents "idge +ents

S)ylights etc!

Main Framing

Main framing basically includes the rigid steel

frames of the building! The PE$ rigid frame


2/8

comprises taperedstraight columns and taperedrafters .steel plate fabricated /'/ or /0/ sections are

referred to as built-up members1! The frame is

erected by bolting the end plates of connectingsections together!

Secondary frame or Purlins, girts etc.

Purlins girts and ea,e struts are also )nown assecondary cold-formed members! There is no

welding in,ol,ed in their preparation! They areprepared by press bending the 0" steel coil gi,ingit the desired shape.2- or %-shape1!

Roof & Wall Panels

Metallic plain or color coated profiled steel sheets

are used as roof and wall sheeting! The steelsheets are generally made from 2incalume orGal,alume coils in thic)ness range of 3!45mm to

3!66mm! The base steel is either gal,ani&ed ha,inga &inc coating ,arying from a minimum Mass of

783 gsm!m8 to a ma9imum of 856 gsm!m8 .totalof both sides1 or a base steel coating of &inc

aluminum .&inc 46; aluminum 66;1 of totalMass of 763 gsm!m8 .total of both sides1 area,ailable with permanent color coating! The color

coating is also a,ailable in ,arious options inpolyester paint coating li)e regular modified


3/8

polyester silicon modified polyester and superpolyester coatings! Special organic coatings li)e

P+


4/8

panels!

These profile steel sheets are usually categori&ed

into two types depending upon the type of fi9ingarrangement followed! These two types are )nownas Through


5/8

(nother alternati,e is to pro,ide pre-fabricatedinsulated panels which comprises two single s)inpanels .plain steel sheets &incalume color coated1

with polyurethane foam insulation in between!

These panels are intended for use as thermallyefficient roof and wall claddings for buildings e!g!

in high altitude areas and cold storages! 'naddition to the abo,e sandwich panels also find

e9tensi,e use in residential as well as non-residential buildings! The panels pro,ide sufficientinsulation and noise reduction properties!

?owadays large cold storage units .Potato @nion,egetables processed foods etc!1 are also made

with this pre-engineered building techniAue!

Crane systems


6/8

These preengineered buildings can be eAuipped

with @,erhead E@T cranes Semi-gantry cranes

wall mounted cranes Mono rails and under slungcranes for ,arious material and eAuipmenthandling operations inside! These buildings arebeing designed for crane capacities ranging from

7MT to 863MT! The crane runway beams .GantryGirders1 are simply supported built-up sections

withwithout cap channels and with maintenance

platforms and ladders! %atwal)s for cranemaintenance are usually mounted alongside the

crane beams suspended under rigid frame raftersor ele,ated abo,e the top of the building roof!%ranes at ,arious le,els can also be pro,ided! PE$

,endors generally do not )eep the supply of railand %rane $ridge with crane in their scope!

Meanine systems

Standard me&&anine structure consists of built-up

beams that support built-up hot-rolled or cold-formed me&&anine joists which in-turn support ametal dec)! ( concrete slab is cast on the metal

dec) as a finished surface! Steel chec)ered platesmay also be used as top surface! These

me&&anines are used for office space storage oreAuipment supports in industries!


7/8

light weight panel boards are a,ailable ashori&ontal surface!

!racing system

=ongitudinal cross bracing used to pro,ide lateralstability to the structure against wind seismic orother forces comprises of rods pipes angles or

cables with an eye bolt and an adjusting nut atboth ends located near the outer flange of

columns or rafters and attached at the web of therigid frame!

Paints and finishes

(ny desired finish can be achie,ed as per thearchitectclient recommendations! +arious choices

are synthetic enamel or epo9y based paintsdepending upon the en,ironment inside andoutside the building!

"ccessories, "ttachments etc.

(s per the functional and architecturalreAuirements accessories are supplied in ready tofit condition! +entilation and lighting systems

should be properly designed in consultation with ane9pert!

#igh Strength Materials


8/8

The standard mild steel used in ci,il engineeringconstruction ha,e nominal yield stress ,alues of

appro9imately 863MPa but the PE$ industry is

using high tensile hot rolled steel plates and coilsof >46MPa! "ecent re,ision of 'S83B8:833B hasincorporated these high tensile grades of steel forstructural uses and there are a good number of

manufacturers li)e T(T( S('= etc! who aremanufacturing these in 'ndia! The new materials

li)e

main components.docx

Documents