Pre-engineered steel buildings (PEB) are a steel structures built over a structural concept of primary members, secondary members, roof and wall sheeting connected to each other and various other building components. These buildings can be provided with different structural and non-structural additions such as skylights, wall lights, turbo vents, ridge ventilators, louvers, roof monitors, doors & windows, trusses, mezzanine floors, fascias, canopies, crane systems, insulation etc., based on the customer’s requirements. All the steel buildings are custom designed to be lighter in weight and high in strength. Thus steel building designs have become more flexible, durable and adaptable over the last four decades which has made steel one of the preferred materials for building construction.

PEB’s are ideal for non-residential and wide-span low-rise buildings. Some of the key advantages of PEB include economical in cost, factory controlled quality, durability, longevity, flexibility in expansion, environmentally friendly, faster installation, etc. Pre-engineered steel buildings are used for diverse applications such as factories, warehouses, showrooms, supermarkets, aircraft hangars, metro stations, offices, shopping malls, schools, hospitals, community buildings and many more.

As a leading PEB manufacturer, Riaz-ud-din Engineering (Pvt) Ltd. (RECO) provides the complete service of engineering, fabrication and erection thus ensuring better quality control at every stage of the process.

Pre-engineered steel buildings consists of following components:

    1. Main Frame Girders
    2. Roof Purlins & Wall Girts
    3. Sheeting Profiles

  • Riaz-ud-din Engineering (Pvt) Ltd. (RECO) R-Prof
  • Riaz-ud-din Engineering (Pvt) Ltd. (RECO) Seam Lock
  • Riaz-ud-din Engineering (Pvt) Ltd. (RECO) Z-Seam ® Standing Seam

    4. Insulated Sandwich Panel

  • Expanded Poly Styrene (EPS)
  • Polyurethane (PU) / Polyisocyanurate (PIR)

    5. Modular Sandwich Panels
    6. Mezzanine System

  • Mezzanine Deck Sheet
  • Sheet Comfloor60
  • 7. Crane System
    8. Accessories, Insulation, etc.


Primary members are the main load carrying and support members of a pre-engineered building. The main frame members include columns, rafters and other supporting members. The shape and size of these members vary based on the application and requirements. The frame is erected by bolting the end plates of connecting sections together. All the steel sections and welded plate members are designed in accordance with the applicable sections as per the latest international codes and standards such as AISC, AISI, MBMA and IS to meet all the customer specifications.



Secondary structural framing refers to purlins, girts, eave struts, wind bracing, flange bracing, base angles, clips and other Miscellaneous structural parts. Purlins, girts and eave struts are cold formed steel


Riaz-ud-din Engineering (Pvt) Ltd. (RECO) standard steel panels are 0.5 mm or 0.6 and mm thick and have a minimum yield strength of 345 MPa. Steel panels are hot dipped and galvanized with zinc or zinc-aluminum coating. Galvanized materials conform to G90 for 275 grams per square metre according to ASTM A653. Zinc-Aluminum coated materials conform to AZ150 according to ASTM A792.

members which have a minimum yield strength of 345 MPa (50,000 psi) and will conform to the physical specifications of ASTM 572 (Grade 50) or ASTM A653 (Grade 50) or equivalent. Riaz-ud-din Engineering (Pvt) Ltd. (RECO) panels are prepared with a multilayered coating system to ensure long life and optimum coating adherence. The base material is pretreated, before applying a corrosion resistant primer and top coat. The combined thickness of the painted film is 30-35 microns on the front side and 15-17 microns on the reverse side


Riaz-ud-din Engineering (Pvt) Ltd. (RECO) Roof and Wall profile is strong and cost effective and was developed specifically for roofing applications. The bearing leg design permits easier installation and maintenance, supports thicker layers of insulation and allows easier curvature for a visually appealing finish.


Standing Seam is premium metal roofing product. This high quality metal roof system is designed to hide the fasteners, creating a beautiful roof with the durability of steel. This panel is factory cut to the half inch. Many of our colors are Energy Star rated for great energy efficiency.Made of high tensile steel, then coated with multiple quality coatings Vertical Seam metal roofing can take it.

Whether its high winds in Quetta, Karachi Port qasim and northern Area, Vertical Seam doesn't back down to the challenge these panels help eliminate cracking and / or blistering which is common in other roof materials. It also allows roof movement for expansion and contraction along with panel strength and durability

These panels have a vertical standing seam design and are highly flexible with concealed fasteners. They provide weather tight field seaming with no end closures. These panels enhance appearance in addition to exceptional durability and corrosion resistance. This system is architecturally compatible in various applications


The Z-Seam ® roof panel is ideal for industrial, Commercial and architectural applications. When Used in a Retrofit application, Double-Lok® increases Energy efficiency and longevity of the structure.


Riaz-ud-din Engineering (Pvt) Ltd. (RECO) offers insulated panels with an excellent slip joint Connection for structural strength and weather tightness. The profiles shown below can be used as an inner skin For roof and wall panels and as partition panels. The inner profiles are available in four different types:Micro ribbed StrippedMicrowaveFlat Riaz-ud-din Engineering (Pvt) Ltd. (RECO) polyurethane (PUR) AndPolyisocyanurate (PIR) foam and EPS Expended polystyrene, Sandwiched by metal orflexible facings is increasingly successful in

Meeting the requirements of the construction industry, with an emphasis On cost effective building systems and conservation. Some Popular applications include industrial and commercial Buildings, as well as the food supply sector (Cold storage, refrigerated transport, etc.). Riaz-ud-din Engineering (Pvt) Ltd. (RECO) produces sandwich panels in 6 Thickness's 35mm, 50 mm, 75 mm, 100 mm, 125 mm and 150 mm. While the top and bottom profiles can be manufactured from variable selections such as the M45-250, M45-150, Microwave, Micro Ribbed, Stripped and Flat.


• Deck sheet and • Comfloor60 ® Riaz-ud-din Engineering (Pvt) Ltd. (RECO) Deck sheet/Comfloor are used in high rise buildings, Office buildings and mezzanine floors in industrial Buildings and warehouses. These decks can be used As a permanent shuttering to support the wet concrete And help in creating composite slabs and floor Beams. The continuous flange stiffeners and deep Embossments increase the load carrying capacities. They provide for a stable and rigid working platform Without any need of propping. These panels are roll Formed from hot dip galvanized coils of 345 MPa With thickness starting from 0.6 mm to 1.2 mm.

Allowable un-supported Span: up to 4m with 125mm Concrete fill Allowable Loads for 4m clear Span: 80 psf Thickness: 0.9mm to 1.2mm Galvanized Sheets Max Load Capacity: 250 psf Standard mezzanine system consists of Comfloor 60 , mezzanine joists, built-up beams and intermediate Support columns. Built-up beams span in lateral Directions and mezzanine joists in longitudinal Directions bolted to the top flange of beams. A Concrete slab is cast on the steel deck or Comfloor As a finished surface. Steel checkered plates can Also be used as top surface as per requirement


Two out of every five metal building systems are constructed for manufacturing facilities where cranes are needed for material handling RECO buildings can be designed to support any required crane system. Overhead traveling cranes, up to 15, 20 or May variable capacity metric tons are supported on brackets, while higher capacities are typically supported by an independent support system. A building crane is a complex Structural system which consists of the crane with the trolley and hoist, Crane rails with their fastenings, Crane runway beams, structural Supports, stops and bumpers. We require the customers complete Crane system information in order to Design and estimate buildings with Cranes. The estimate for adding a Crane system to a metal building Consists of: Strengthening the buildings main frames to support the crane load Supplying the crane brackets and crane runway beams that support the crane system


In addition to the main building components, Riaz-ud-din Engineering (Pvt) Ltd. (RECO) provides a wide range of building accessories.

High Strength bolts:

are hot dip galvanized and conform To ASTM A325M Type 1 or equivalent. These bolts are used to connect Primary and secondary members.

Anchor Bolts:

are manufactured from rods conforming to ASTM F1554 Grade 36 or equivalent, with a minimum yield strength of 250 N/mm2 and an ultimate tensile strength of 400 N/mm2.


Roof and wall fasteners:(used to attach panels to purlins, Girts, etc.) Are self-drilling fasteners with a thread diameter of 5.5mm? The head is hexagonal (8mm), preassembled to a 19mm diameter washer That is bonded to a 3mm thick EPDM seal.

Stitch Fasteners:

(used at panel side laps and to attach flashings To panels) are self-drilling with a diameter of 4.8mm. The head is hexagonal And preassembled to a 16mm washer that is bonded to a 3mm thick EPDM seal. For Aluzinc coated steel panels, the fasteners are manufactured from high grade Carbon steel with the surface protected by a zinc based coating of 8 microns. For aluminum panels the fasteners head and stud are manufactured from stainless Steel, whereas the drill bit is made of hardened carbon steel. Poprivets:are 4.0mm in diameter and made from Stainless Steel. They Are used in gutter splicing, fixing trim to trim or trim to panel and fastening Accessories to roof or wall panels.

Foam closures:

match the panel profile and madefrom expanded polyurethane or similar material. Bead Mastic:is a butyl rubber based sealant and Supplied in rolls on silicon release paper.

Flow-Able Mastic(Caulking Sealant):

is a Neutral silicone sealant that is chemically inert and non-corrosive. It is UV resistant and suitable for exterior applications against Weathering and rainwater. When cured it is non- toxic and will Accommodate high thermal and shrinkage changes in structural Movement joints.


Fiberglass blanket composed of stable and uniformly textured inorganic glass fibre bonded together by a non-water soluble and fire retardant thermosetting resin.The standard insulation thickness is 50mm, higher thickness's (75mm and 100mm) are available upon request.

The standard insulation facing is either Foil Reinforced Kraft (FRK) or White Metallized Scrim Kraft (WMSK).The insulation is supplied in rolls where the insulation width is 1.0 meter for WMSK facing, and 1.1 meters for FRK facing. Both types of

facings extend 50mm on each side of the insulation. The standard nominal density of the insulation is 12 kg/m3. Higher densities (16 kg/m3 and 24 kg/m3) are available upon request

Heavy Duty Personnel Doors:

Personnel doorsare flush finished and 49mm thick. Single leaf doors are 915mm wide x 2135mm high . Double leaf doors are 1830mm wide x 2135mm high. Doors are reinforced, stiffened and sound deadened withan expanded polystyrene core, laminated to the inside faces of doorpanels, completely filling the inside cavity of the door leaf. Steel door panels are 1.2mm thick hot dip galvanized cold rolled steel,thoroughly cleaned and painted with RAL 7035 (light gray) color finish to ensure adequate corrosion protection. Doors are factory prepared

for a cylindrical lockset. Door frames are 1.5mm thick hot dip galvanized or equivalent, thoroughly cleaned and painted with RAL 7035 (light gray) color finish coat. Door frames are delivered knocked down, mitered corners have brackets with pre-drilled holes for field assembly and are supplied with all fasteners necessary for assembly. The lockset is a keyed cylindrical type with satin chrome finish(optional panic devices and auto closers are available).Each door leaf has 3 ball bearing hinges with a security set screw in the barrel to prevent removal of the hinge pin with the door in a closed position.

Steel Sliding Doors:

The frames of horizontal steel sliding doors are manufactured from 2mm thick cold formed channels and girts, and are delivered knocked down for field assembly. All clips, fasteners and other items necessary for assembly are provided. The exterior face of the door leaf is sheeted with profiled panels that match the profile and material of the wall panel.

Door leaves are suspended from an exterior mounted trolley rail, attached to a structural header beam.

The door hood trim, to conceal and protect the header and rail, is supplied in the same material as the wall panel. Doors are bottom guided by a specially designed steel rail track. Sliding doors may also be provided with flush hinged pilot doors. A pilot door is a personnel door located within a leaf or the sliding door.

Adjust Able Steel Louvres:

Adjustable steel louvres are 0.9 meter wide x 1 meter high. They are supplied complete with a galvanized steel mesh, blades, and framing. Made from 0.5mm pre-painted Aluzinc coated steel sheet and are only available in off white color.

Gravity Ventilators:

Gravity ridge ventilators are 3 meters long, with a throat opening of 600mm and without a damper. They are installed as either individual units or as continuous (ex: joined) units. The outer skin of the ventilators is made from the same material as the profiled roof panels. The ventilators are supplied complete with bird screens. Ventilators are shipped knocked down and ready to be assembled on site

FiberGlass Roof Skylights:

Translucent reinforced Corrugated fiberglass skylight panels substantially reduce the amount Of artificial illumination and electricity needed to light the inside of your building. Various corrugated shapes are available to nest with existing corrugated metal Panels eliminating the need for additional flashing or roof curbs. Skylights can also be fabricated on to a built up roof curb for flat roof or Membrane roof areas where light is required.

Steel Roll up Doors:

A roll up door curtain is cold formed from hot dip galvanized steel and painted with a polyester paint in off white color. The bottom rail of the door curtain is an extended aluminum angle guide. The door drum, supporting the door curtain, houses safety springs, end shafts, Collars and bearings. Doors are supplied complete with guides, axle, curtain, manual chain and a reduction gear operating system. Electrically operated doors are available as an option, upon request.


Window frames are made of anodized or powder coated aluminum extrusions and are the horizontal, half slide type, 1 meter high and 1 meter wide, specifically designed for installation in profiled exterior wall panels. Windows are factory glazed with 6mm thick clear glass and are equipped with latches and removable insect screen.