At this moment, there is a building in Dubai that is transported thousands of tons of vehicles, humans and machinery. It rose within months, and the beams that make up its structural frame were even produced in a factory before the project was even begun and a ground was laid. Precast concrete beams are just doing what they do, and everywhere in the UAE.
From the factory floor to the building permit, this guide covers everything you need to know about precast concrete beams, from their standard sizes to how to secure DM approval.
So, what is a precast concrete beam Manufacture?
A precast concrete beam is a horizontal structure element that is cast in a controlled factory conditions and delivered to the building site to be installed. It is used to connect columns or walls, to transfer loads to floor and roof and to provide the main horizontal load transfer system in a precast frame building.
This is a different approach from cast-in-situ construction, which involves getting the formwork up on site, fixing the steel, pouring concrete and allowing it to cure and strip off before proceeding, and is a slow and variable process. Precast eliminates all this from the critical path altogether.
Precast beams and columns – no curing time on site, as the element is cured in the factory before its delivery. Grouted sleeves and/or bolted connections are used to create column connections, depending on the requirements of the project. This is not a luxury or a mere consideration in the UAE construction industry, but often a prerequisite as to why precast is even being considered in the first place.
Why Precast Beams Are Used For UAE Projects
It’s all about speed, but not the only reason.
Besides, consistency is important. Beams can be produced under factory control to be as slender and economical as possible, frequently including composite cross-sections in which the thickness of the concrete topping or screed applied in situ minimises the thickness of the beam in total, but increases structural efficiency. This sophisticated engineering level can be achieved in a controlled area where environmental conditions are stable, not on a “live” site in the middle of summer, with ambient temperatures hovering in the middle 40s Celsius.
The precast beams and columns are made from high strength concrete, giving a secure and durable product which generally exhibits a clean finish at the structural level without the need for extra fireproofing, and which is completed to give a fully finished structural appearance when installed. This eliminates the additional fireproofing measure, saving real time, materials and programme days – and it can make a significant difference to the UAE’s regulatory requirements.
Precast Concrete Beams are employed in various forms across the UAE
Multiple different beams are used for various structural purposes in the construction of buildings in the UAE and the design of the beam is determined by the type of flooring system, the span needs and the design of the beam connection.
The simplest cross section of reinforced or prestressed concrete is a rectangular beam which can be used for all kinds of loading conditions and clear spans. They are often seen in warehouse construction, industrial structures, and designs that prioritize simplicity and clarity in the building’s form and function.
Inverted tee beams (IT beams) are probably the most used in the multi-storey building sector in the UAE. Like the name implies, the cross section is an upside down T, and includes a ledge along the bottom flange for hollow core or solid slabs. These beams are very versatile, are used in preference for the design of parking structures, can be used on roofs and floors and are reliable to spans of up to 15 metres. It ranges from hinged connections to semi-rigid to absolutely rigid, depending on the structural system involved. Visit most car parks or warehouses in the UAE and you will find many hollow core slabs placed on a ledge of an inverted tee-beam.
L-beams are utilized around the edges of a building. Their L shaped configuration enables them to fit between the structural sections and create a ledge to support precast flooring units, along with an edge support for the floor system. They look like a rectangular beam but one face is flush to the building line and the other face is seated to receive the slab, and are a feature of precast frame buildings that can be seen along the edges of buildings all over the UAE.
On the outside of the building, there are beams known as spandrels located at every storey level, often used as edge members in the architecture. They not only pass the load from the floor to the structure, but also define the facade line and in a number of UAE commercial projects are directly involved in the external appearance of the building. Spandrel beams can be flat, curved or profiled according to the architectural purpose.
Bridge and infrastructure beams are used for road and flyover applications and major infrastructural spans with different load requirements and they are able to span long distances. These are installed in bridges, walkways, business buildings and marine jetties. In the UAE, the demand for this type of beam is continuous and strong with the continuous investments in road and bridge infrastructure and the transit sector.
Standard Sizes of Precast Concrete Beams in the UAE
In most cases, the size of beams is determined by structural calculations, which take into account the length of the span, the load and the type of connection, but an approximate range of dimensions is useful for initial planning.
The width of inverted tee-beams is normally between 450mm (18″) and 900mm (36″) and their length is between 12m and 30m (40ft and 120ft). Spans in the range of 14 to 18 metres are not uncommon in the parking structure market in the UAE, allowing column-free bays to optimise the use of the floor space.
The width of rectangular beams typically ranges from 300mm to 600mm, while their depth can be 400mm to 800mm, depending on the loading and span requirements. If reinforced correctly, these beams can span longer than similar cast-in-place beams within shallower depth, which can be a significant benefit where floor-to-floor height is important.
Bridge and infrastructure beams are longer, in many cases over 30 metres for suitable loading conditions, of high strength concrete, and the profiles of the prestressing strand are carefully designed.
Final dimensions are dependent upon beam-depth-to-span ratios, grade of concrete, layout of prestressing strands, and composite action with in-situ topping. There is no responsible manufacturer that provides a one size fits all spec sheet—it is down to engineering calculations for any specific project. These are only ranges and are a realistic starting point for planning.
Precast Beams are delivering at real projects in the UAE
It’s not just about the theory. The real projects at UAE make a statement.
Significant multi-storey car parks, such as those in Dubai, have been designed and constructed entirely from precast elements such as long-span hollow core slabs, beams, columns, shear walls and stairs, and for many large projects, the superstructure construction time has been as short as six months. The transformation of a large scale parking structure is quite telling.
In addition to car parks, precast beams and hollow core slabs are being widely used in the UAE’s high-rise towers for horizontal structural applications; the same speed and quality benefits that make precast popular in other parts of the world are also making it popular in the UAE. Precast beams are also extensively used in stadiums, schools and universities where large spans and heavy loads are needed.
Precast Beam Manufacturers must meet certain requirements to obtain DM Approval
Dubai Municipality has clear, well-defined and enforced precast concrete manufacturing standards. Here are some examples of how the compliance pathway works.
The requirement for factory certification is based on Administrative Decision No. (316) of 2012 regarding Ready Mix Concrete Plants, Precast Concrete Factories and Central Batching Units. As per this decision, all precast concrete factories are required to have Certificate or Conformity Mark from the Certification and Quality Control of Products Section (DCLD-CQPS) of Dubai Central Laboratory based on the operating criteria and certification rules as stated in Dubai Technical Guide (TG-02) for Precast Concrete Factories. This is a factory certification and is not project specific. It is either they own it or it does not exist; if it does not exist, they can’t produce anything that will be part of any project in Dubai Municipality.
The factory is eligible to use the DCL Conformity Mark when it is issued a Product Conformity documentation that complies with DM standard specification DMS 026 and Administrative Decision (316) of 2012. This is the minimum amount of documentation that any precast beam supplier in Dubai should be able to give upon request.
The concrete temperature control requirement isn’t a box to tick, it’s a real technical requirement. DM Standard Specification DMS 026 specifies that the temperature of placed concrete should not exceed 35°C, which can be achieved by a variety of methods including the use of flaked ice in the mixing water, use of chillers to cool mixing water and the use of light coloured paint on plant equipment to minimise heat absorption. This has a direct impact on the quality of concrete particularly because of the high summer temperatures in UAE, which is frequently above 45°C.
Structural design approval is a separate process to factory certification. Drawings must be prepared by a qualified, registered (licensed) Dubai structural engineer and submitted via the Dubai Municipality portal for the Buildings Regulation and Permits Agency to review the design of beams, connections and reinforcement specification.
Public access to certified products: DM has a public list of certified factories and conformity certificates are issued on request via the factory assessment scheme of the Dubai Central Laboratory Department. This list can be used by contractors and consultants to ensure that a manufacturer is established before procurement even starts, not when beams are lying on site waiting for approval.
Selecting a Precast Beam Manufacturer in UAE
The UAE’s precast industry is well established and is competitive, with experienced manufacturers across Dubai, Abu Dhabi and Sharjah with large production facilities, and dedicated engineering teams that are able to produce complex beam configurations at scale.
Don’t just research manufacturers in the brochure. Ensure that they have a valid DM Conformity Mark, ISO 9001 certification, project references at a similar size, and confirm their design and engineering skills, rather than their production capacity. A fast pouring concrete factory that does not have proper structural design support is just half of a complex precast project.
Conclusions of precast concrete beams in UAE
Precast concrete beams in UAE have proven to be one of the most useful and effective structural solutions in the UAE construction toolbox. The technology is well proven, there are good manufacturers on hand, and the regulatory environment (though demanding attention and time) is clearly specified.
Precast beam projects that succeed generally have one thing in common—they involve the manufacturer early in the project. So, the secret to being on programme and on budget for precast beams is to design and manufacture from the outset, submit to DM early and begin procurement early in the project timeline.
Precast concrete beams meet the speed, quality and efficiency demand of the UAE’s construction industry.
The information sources are: Dubai Municipality (dm.gov.ae) — Administrative Decision No. (316) of 2012, DMS 026:2018 Technical Requirements for Ready Mixed Concrete Plants; KKK Precast (original source content and internal pages).