Niazit Metal Deck (suitable replacement for sub-beams on the deck roof)
In-deck roof systems, load-bearing beams, deck sheets, and reinforced concrete slabs (in case of a considerable distance between beams) are usually used. This system is used in metal skeletons but cannot be used in concrete skeletons.
Due to the elimination of concrete in the joist web, Niazit joists are designed to replace secondary beams in the structure quickly, and the ability to implement this system in concrete skeletons has also been provided.
In Niazit decks, instead of using 0.8 to 1 mil deck sheets, 0.3 to 0.4 mil gable sheets are used, which only serve as a permanent formwork in the roof.
In Niazit decks, nails are installed on the joists, and there is no need to weld nails to the roof, which results in faster implementation and reduced costs.
Regarding the weight of the beams in a metal deck, as you know, although the distance between the secondary beams is greater than that of the joists, their average weight per square meter is usually more significant than that of the joists, which results in higher costs. (Of course, other factors, such as installation labor costs, etc., are discussed in detail in the section comparing Niazit decks with metal decks.)
components of the Niazit Metal Deck CJ-series
A) Upper edge:
The upper edge of the beam is made of a shield section (T) that is rotated 90 degrees in the direction of the beam so that the extension of the vertical middle edge can pass through it, which is considered the compression member of the beam. (Compression edge)
B) Middle edge:
Diagonal members or the middle edge are made of plain or ribbed rebar, and are used from vertical and diagonally cut pieces that are welded to the upper and lower edges. The vertical element functions as a compression member and the diagonal element acts as a tension member. (Tension middle vertical edge and compression middle diagonal edge).
C) Lower edge:
It is made of strap (PL) or st37 steel sheet.
D) Reinforcing parts (shear):
It is part of the reinforced sections that are applied to it based on critical states in beam calculations.
d) Assembly rebar:
Assembly rebar, which is a non-load-bearing member in the beam, is used to facilitate the installation of the beam in the concrete frame during concreting. In a metal frame, since the lower edge of the beams is given a nominal amount of weld to the iron beam during installation, assembly rebar is not required.
d) Nail:
In the beams, the nails appear from the vertical middle edge of the upper edge.
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