When using metal deck for a commercial construction project, you need to ensure that the sheets of deck are properly attached. There are many different metal deck attachment patterns, which vary based on the type of metal deck you are using. One example is the 36-4 attachment pattern, which is commonly used with 1 1/2″ B Deck and 1 1/2″ Composite.
In this article, we will cover the features of the 36-4 attachment pattern for metal deck, and the options for securing a metal floor deck system with this pattern.
What Is a 36-4 Attachment pattern?
Metal deck attachment works by joining overlapping edges of the metal decking together to limit the amount of space between deck panels and secure the flooring system. The 36-4 pattern is a specific method of attaching panels of 1.5″ composite metal deck and 1 1/2″ B Deck together.
The “36” in the attachment pattern signifies the width of the panel. The second number, in this case the “4” indicates how many support fasteners to use per panel width. Once the deck is overlapped, the 36-4 pattern will require an attachment at every other rib.
The fastening pattern is determined by the structural engineer on record.
When attaching composite deck, deck panels should be fastened at the perimeter at 12″ on the center maximum. Deck panels with spans greater than 5 feet shall have side laps and perimeter edges fastened at mid-span or 36″ intervals – whichever is smaller. Additionally, end closures of the deck (if required) should be fastened at 36″ centers maximum.
Ways to Attach Metal Deck
There are a variety of options for attaching metal deck, including fastening screws, power actuated fasteners (PAFs), button punch tools, and welding.
Fastening screws are installed using a torque-controlled drill, which can properly install the screws without stripping them. There are three sizes of screw: #10 screws, which are usually used for sidelap attachment, and the large #12 and #14 screws, which are usually used for support fastening.
Power Actuated Fastener (PAF)
A power actuated fastener is driven into a supporting metal deck structure using either a powder cartridge or pneumatic pressure. The PAF penetrates through the metal deck layer, fusing the fastener shank to the base steel supports.
Button Punch Tool
A button punch tool, sometimes called a sidelap crimping tool, works by crimping two overlapping edges of metal deck together to secure their place. Button punch tools can be used on all different types of metal deck, and gauges ranging from 22 grams to 16 grams.
Welding is a traditional method of attaching metal deck. More specifically, electric arc welding is the best and most economical method for attaching composite deck sheets to structural supports. However, it is important to note that welding is also very intricate, and requires a high level of experience and inspection to ensure that it has been performed correctly.
Welding creates a very strong attachment between metal deck panels, penetrating into supporting beams or joists. For 1.5″ composite deck, panels should have no less than 3/4″ diameter arc spot welds.
CSM Metal Deck Is Your Trusted Partner
Family-owned and operated, CSM Products & Solutions has been supplying metal deck for more than 50 years. We take pride in our full line of products, knowledgeable staff.
Contact us today to get started on your order of metal deck. We can provide you with the information you need to confidently select the right kind of deck and attachment tools for your next project.