All commercial building projects that involve the use of steel decking do not rely on the main deck panels alone. Although B deck, N deck, and form deck are used as structural platforms of floors and roofs, they need other elements to execute their complete role safely and efficiently. These components—known as metal decking accessories—support, seal, and complete the deck system.
The most popular ones include closures and pour stops that are essential in concrete floor assemblies and roofs. Other accessories such as flute fillers and sump pans are equally important in performance and durability. Knowledge of how each accessory fits into a complete system will allow contractors, fabricators and project managers to plan better and make fewer mistakes when installing the system.
Keystar Industries supplies a wide range of metal decking accessories and offers guidance on how to specify them correctly. This paper discusses the role of these components and how they are significant in the completion of a code-compliant, structurally sound construction.
Closures: Capping the Ends and Edges of Deck Profiles
Closures are sheet metal inserts or caps which are used to seal the open fluted ends or sides of metal decking. The unsealed open cells of the deck may jeopardize insulation systems, concrete leakage through during pours, or weather infiltration of structural components.
Closures are of two major types, end and side closures. End closures are usually fitted at terminations where the deck panel is at an edge angle, wall, or parapet. Side closures are employed where the decking ends before structural support and needs fill to fill in the gap.
Every closure has to be manufactured to fit the profile of the deck that it is supporting. An example is that a Type B deck has a different flute pattern to a Type N deck, so that closures are not interchangeable between profiles. Keystar also makes sure that all the closure components it provides are cut or shaped to fit perfectly, preserving both structural integrity and aesthetic integrity.
Fire resistance and acoustical performance is also provided by closures when they are utilized in floor systems, particularly in conjunction with insulating material or perforated deck panels.
Pour Stops: Housing Concrete in Floor Systems
Pour stops (also known as edge forms or edge angles) are vertical steel pieces installed around the perimeter of form deck to hold the concrete during a slab pour. They are particularly significant in multi-story buildings where composite or non-composite slabs are poured over the metal decking.
Pour stops are not used, the concrete would spill over the edge of the decking, causing safety hazards and resulting in large amounts of waste and cleanup. Pour stops do not only mark the slab edge but also offer a finished edge that can be joined to structural steel or perimeter angles.
They are typically welded or mechanically fastened to framing and have to be ordered in the proper height to fit the desired slab depth. Slab depths may vary according to application-office floors, mechanical platforms, and mezzanines have different loading and finish requirements. An adequately sized pour stop will make sure that the concrete is poured evenly and will cure to the desired thickness.
Keystar also manufactures pour stops in various heights and gauges with both galvanized and primed finishes to match decking products. Notched pieces to columns or beam penetrations and custom configurations are also available.
Other Metal Decking Accessories and Their Use
Besides closures and pour stops, a number of other metal deck accessories complete the installation of deck systems. These elements assist in controlling drainage, insulation, reinforcement and acoustics.
These are some of the most popular metal decking accessories and their functions:
Flute Filler: Inserts installed in the corrugations of decking to provide a level surface to penetrate or to support equipment. Necessary in securing mechanical units or curbs to fluted deck.
Foam Closure: It is applied instead of metal closures where flexibility is required or where air infiltration is to be limited. Frequently used in roof systems that have light insulation.
Sump Pan: A shaped metal depression to hold roof drains but keep the surrounding deck level.
Bent Plate: A general-purpose edge piece that is bent at designated angles to act as perimeter support or interface connection to wall systems.
Acoustic Batting: Insulation installed over perforated deck panels to absorb sound in gyms, auditoriums or offices.
Cell Closure: Special closure applied in cellular decking to seal off conduit paths or enclosed voids in the deck panel.
These are not optional extras, they are essential to safety, structural integrity and long-term performance.
Planning for Accessories with Keystar Industries
Metal deck is not sufficient to complete a roof or floor system when ordered alone. To streamline installation and ensure every detail is accounted for, Keystar helps contractors coordinate metal decking accessories at the time of initial ordering. This involves the inspection of drawings, determination of the components needed, and the synchronization of all the materials at the jobsite.
Keystar accessories are cut to length, profile-matched, and packaged by project as required. We have a skilled workforce that is capable of producing custom pieces in complex details or unusual structural conditions. We have the capacity to reverse orders within a short time at our Eagan, MN facility and thus assist with scheduled installations as well as urgent replacements or repairs.
Above all, when you order both deck panels and accessories through Keystar, you minimize the risk of having incompatible parts, delivery problems and construction delays. We stock a complete line of parts in galvanized and primed gray finishes to enable you to meet job specifications and deadlines without compromise.
Get the Details Right from the Start
The performance of a completed steel deck system can be deceptively straightforward on the surface, but it is a combination of a number of detailed parts that are working in concert. Metal decking accessories such as closures and pour stops ensure your roof or floor system holds up under structural loads, prevents leaks, and passes inspection.
Failure to consider these components in the design or procurement stage may result in expensive delays or more challenging installations than should be the case. The better approach is to work with a knowledgeable supplier like Keystar Industries who can ensure all accessories are correctly specified, cut, and delivered—ready for immediate use.
Learn more or start an accessory order by calling Keystar at 651-256-0008 or emailing in**@***************es.com. We will assist you in smarter building, starting with the initial deck panel to the last edge closure.