Metal framework is one of the most widely used and popular type of framework in the building. But how to find the best metal frame roof When you come across a building under construction, you see nothing but columns and beams connected to each other, you guessed it, a set of columns and beams that are generally made of steel and Various methods such as bolts and welding are connected to each other, they are called metal skeleton.
The most important task of the metal skeleton is to maintain balance and create resistance against all kinds of forces, in fact, it is impossible to build a structure without skeletonization
Types of ceiling for steel skeletons
- Chromite roofs
- Composite roofs
- Block beam roofs
Finding the best roof for a metal frame, various factors in choosing the type of system The roof is involved, among which the following can be mentioned: - building plan - roof load - desired lateral resistance value - desired thickness for Roofs
- fire resistance
- amount of sound wave transmission
- total weight of the roofs and as a result the weight of the building
- underside of the roof
- flooring method
- Position of the roof
- Method of installation of utility systems
- Type of building use
Chromite ceilings
For the construction of steel roofs, steel joists and beams are used. The construction of these roofs is made of a belt in the lower wing and a rebar that is bent is used in the roof, and polystyrene and cement blocks are used as a fixed mold and composite as a temporary mold and lightweight filler to fill the empty space in between. Beams are used. The distance between the beams is 73 to 100 cm, which varies depending on the model.
The roof is covered with 4 to 10 cm of concrete. Roofs are parts of buildings with a metal frame that According to the structural resistance, they are made using different materials and in different ways. This type of roof looks like a regular block joist from the outside, but the joist used in the chromite roof is different. An open metal beam is used to implement the chromite roof.
The roof is made of steel structures and is a new model of the roof. It has high resistance and is integrated. This roof has more advantages than other roofs; And it is used in various structures, especially in metal skeletons. The steel beams that are used to make the chromite roof must be inspected before installation to make sure that there are no defects in them.
A variety of chromite roof models
Kermit polymer: Polystyrene block is one of the materials used in this roof, and it makes less steel and beams to be used and plastering is easier under the roof.
Chromite beam roof: This roof is much simpler than the normal beam roof.
Chromite composite: In these roofs, the beam It is used less and instead of using a beam or honeycomb, a steel beam with an open web is used, and the web of the beam is covered with concrete and covered with a concrete slab.
The benefits of chromite ceilings
🌀 High speed and easy implementation: in this system, it is possible to move around 48 hours after concrete is poured on the roofs.
🌀 More integrity in the roof and skeleton: the beams The skeleton is welded and after the concrete is taken, the skeleton and the roofs are integrated. prepared and concreting operations on the roofs at the same time. This work is cost-effective for buildings that have low infrastructure or many floors.
It can be low: the joists can withstand the weight of wet concrete and blocks and executive agents before concreting. Finally, the tension that is created in the concrete is much less.
The removal of elastics makes the under-ceiling more uniform and the amount of steel consumption is reduced. And the soil is more than other parts of the roof, as a result, the suspended particles are less absorbed.
🌀 It is possible to design and implement a roof with a long opening and a special load: in this system, you can implement a roof with a long opening.