ClarkDietrich Barrier Mesh (BM) can also be used without sheathing to provide an enhanced protection of security to walls, ceilings as well as floors. Barrier Mesh is produced in different size diamonds and gauges for minimum, medium or maximum security protection.
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In addition to providing high-strength and fire-resistant protection, Barrier Mesh also offers a cost effective and time-saving alternative to reinforced concrete or concrete masonry systems. The Barrier Mesh System is designed to attach to metal or wood stud framing with specially designed Barrier Mesh™ clips, purchased with the Barrier Mesh and shipped together, as a system. ClarkDietrich mesh sheets are 4’x 8’ and sizes in chart below; special order mesh sizes available upon requests with additional lead-time.
Projects Uses:
Correctional facilities, Government offices, Retail stores, Computer rooms, Airport security, Law enforcement facilities, Military facilities or any space that requires substantial barrier protection.
Custom designed Barrier Mesh Clip, specifically to be used when installing Barrier Mesh into walls and ceilings.
ClarkDietrich BM-Clips are high-strength steel components which provide secure attachment of Barrier Mesh metal panels to wood or steel stud framing for a complete Barrier Mesh System. The ClarkDietrich BM-Clips act as “washers” for the attachment of the Barrier Mesh to framing members. 300 clips/carton. BM-Clips are available upon request.
Installation and lay-out of the BM panels on the job shall be approved by the owner or general contractor prior to installation, with the intent to attach mesh panels on vertical framing members. ClarkDietrich recommends the framing members be no less than 20ga metal studs for security applications. Barrier Mesh panels may be installed with diamonds running in either direction. Barrier Mesh is produced to industry standards (EMMA) of (up to) -0 + 1⁄4" per foot tolerance in either direction of the mesh. Therefore, the mesh may not be perfectly square. The barrier mesh’s joints shall join by either staggering or butt joint diamonds. If the previous joining methods can’t be employed, ClarkDietrich allows overlapping the mesh panel’s joints, with proper fastening or wire-tying between framing at recommended spacing.
Barrier Mesh shall be attached to framing members using ClarkDietrich BM-ClipsTM through recommended threaded fasteners. Steel stud fasteners shall be flat head, bugle type, self-tapping screw long enough to penetrate the steel stud at least 3/8". For wood stud applications, use a 1-5/8" fine thread drywall screw allowing the fastener to penetrate the framing member at least 11⁄2". ClarkDietrich recommends ClarkDietrich BM-ClipsTM be installed 12" on-center vertically on framing members. The ClarkDietrich BM-ClipsTM are the preferred method of securing mesh panels to framing members. If planning to weld the Mesh to framing, please contact ClarkDietrich for specific installation instructions.
Cut the Barrier Mesh with a hand held circular saw with abrasive or carbide tip blade; hand-held grinder with cutting wheel, cutting torch or heavy duty snips.
As experienced concrete floor contractors, our Metcon Concrete Floors division are concrete floor specialists able to design high-performance concrete ground floors or suspended concrete floors on composite steel decking. In this knowledge article, we’ll explain what is a reinforced concrete floor, what is mesh reinforcement, and discuss in detail composite floor construction and composite slab design.
Reinforced concrete floors are a type of formwork found in the construction industry. They comprise sheets of steel mesh laid horizontally on a sub-structure around which concrete is cast to form a ground floor slab, or suspended floor slab.
Concrete can also be reinforced with steel fibres which are added to the concrete mix before it is poured.
Steel mesh reinforcement is an important element of concrete floor slab design and construction.
Reinforcing steel bars (also known as rebar) are cut and laid in a grid format before being welded to form mesh sheets. Concrete floor contractors use large quantities of these steel mesh sheets in the construction of reinforced concrete floors. The sheets are laid horizontally on a sub-structure. Concrete is pumped on top of the steel mesh reinforcement and allowed to dry hard so the mesh becomes embedded within the concrete floor slab.
In the construction of suspended floors, such as on steel frame buildings, the sub-structure is often composite metal decking.
Steel mesh reinforcement is available in different grades which vary from A142 (6mm rebar) to A393 (10mm rebar). The grade of steel mesh used is dependent on the performance and spanning capabilities of the composite metal decking profile specified and the thickness of the concrete floor slab. Mesh grade thickness also takes into account any additional loose steel bar reinforcement required to support concentrated loads on the floor slab design.
Sheets of steel mesh reinforcement are most often supported on concrete mesh spacers which ensure the mesh stays in position during the casting of the concrete floor slab. The steel mesh reinforcement should be positioned so it sits within 15mm to 40mm from the top of the finished concrete floor slab.
Fibre reinforced concrete is an alternative to steel mesh reinforcement in concrete floor construction. Steel fibres are added to the concrete mix before it is pumped onto the sub-structure and the concrete floor is cast.
In composite floor construction, steel fibre reinforcement can replace mesh reinforcement when certain profiles of composite metal deck have been specified. When Kingspan Multideck steel decking has been specified, steel fibre reinforced concrete can be used with profiles MD50-V3, MD60-V2 or MD80-V2.
Steel fibre reinforced concrete can be prepared off site to a specified dosage. It can also be used for the construction of concrete hardstandings and heavy-duty industrial concrete floors.
There are many advantages to using steel fibre as concrete floor reinforcement:
Concrete as a construction material is strong in compression but weak in tension. Unless reinforced, concrete subjected to high traffic, heavy loads and even extreme temperature changes can crack, bend, become brittle and structurally unsound.
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By adding a method of reinforcement to a concrete floor it is possible to improve its durability, strength, fire and load bearing performance and longevity.
Reinforcement will:
Steel fibre reinforced concrete has the added benefit of being quicker to install than mesh reinforcement, and there is no requirement to store the rebar on site or to hoist it to the required storey for installation.
Steel fibres will typically provide an even distribution of reinforcement throughout the entire concrete slab which improves its flexural strength and crack resistance and provides the surface of the concrete with higher impact resistance.
As neither mesh nor fibre reinforcement can prevent cracks from occurring in a concrete slab, properly spaced control joints should be incorporated into the concrete floor slab. Should a crack occur where it was not expected, steel mesh reinforcement will do a better job than fibre reinforcement of containing the crack and preventing it from opening up further.
Steel is durable and relatively lightweight; it also has excellent tensile strength whereas concrete has compressive strength.
Steel reacts to thermal changes in the same way as concrete. This means internal stress, or damage, to the concrete floor slab is avoided as both steel and concrete expand and contract as temperatures increase or reduce.
When used together in composite concrete floor construction, the two materials complement each other’s weaknesses and greatly improve the structural rigidity and load bearing capabilities of the concrete floor.
Composite concrete floors are a method of formwork frequently used in construction, particularly on steel frame buildings.
Reinforced concrete is cast in situ on sheets of profiled composite steel decking (also known as composite metal decking). Together the steel and concrete combine to create a composite floor slab (also known as a composite slab) which is more durable and has a better fire and load bearing performance than each material has if used in isolation.
Also within the composite floor slab are shear studs which are welded through the composite steel deck to the top flange of the steel beam before the steel mesh reinforcement is laid and the concrete floor slab is cast.
Composite construction has many advantages:
The structural efficiency and cost efficiency of composite construction make it an extremely popular choice of formwork for all types of buildings:
Composite metal deck and reinforced concrete floors are often used in the construction of industrial buildings to provide concrete external hardstandings, internal concrete floors and internal mezzanine floors capable of withstanding heavy static and dynamic loads.
Composite floor systems deliver many benefits to those involved in raised deck and multi-storey car park construction:
Composite slabs should be designed by a qualified engineer to provide accurate fire and load calculations, concrete reinforcement, slab thickness and to, therefore, ensure a building’s structural integrity.
Reinforced concrete floor design, including designing concrete floors on steel decking, is a service offered by concrete floor contractors, Metcon.
Metcon is a dedicated concrete floor contractor division within Raised Floor Solutions that specialises in the design and construction of reinforced concrete floors.
Concrete floors can be designed and installed on steel decking and reinforced with either steel mesh or steel fibres. Metcon will also design and construct reinforced concrete ground floor slabs and install perimeter edge shutters, progressive collapse details and in situ concrete structural screed toppings to precast concrete.
In partnership with sister division, Metal Deck steel decking, Metcon will provide a complete composite flooring construction service using Kingspan Multideck steel decking. A specialist metal roof contractor division, Metalroof, will also supply and install structural metal roof deck.
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