Wisdom joists
In the construction of beams, the following points are taken into account:
Explanation 1: All stages of construction of joists and implementation of the roof, based on the regulations of 151 and 543 of the Management and Planning Organization and the manual of the cross-sections of metal joists with open life, and the cross-section requested by the employer with All technical principles are observed.
Explanation 2: All beams are designed, welded and made on a special template with a height (200/L) opening, with a co2 welding system. Explanation 3: To make beams from belted sheet and angle with cold bending steel sheet with ST37 standard of Mubarakeh steel and for the truss member (zigzall) from grade 10 ribbed rebar with A2 hardness is used.
Explanation 4: The Hikmat beam group, with more than 23 years of experience in the production of metal beams without the need for piling (chromite) and concrete beams with interest It is the pride of this collection to have an experienced staff, producers and implementers of all types of roofs, including metal beams, clay beams and steel decks, with the process of eliminating intermediary factors between the production of roof materials and the consumption of materials, which ultimately significantly reduces the total price. will follow the roof and in line with the optimal consumption of energy, cost and time and optimal use of standard materials, we will be responsible for the production of the beams of your project. Also, we hereby declare our readiness for the complete implementation of the roof as soon as possible with the highest quality.
Lack of design and calculation of metal joists (chromite)
A) Since the producers of chromite beams sell them by the kilo, the heavier they make them, the more profit they get. Therefore, sometimes beams with a weight of two or three times the required weight are made and It is delivered to the customer and thousands of justifications are presented for this so that the consumer is also convinced that these heavy beams are made in accordance with the calculations. Unfortunately, some engineers encourage this because they do not know the calculations of this type of beams and cannot control the beams, so as not to build a weak beam. Most of the details of the chromite beams that can be seen in the executive plans of the structures fully confirm this and unfortunately, with this method, national funds will be buried in the roof of the buildings.
b) If the same manufacturers have a ceiling implementation contract with the customer, since they have to reduce their costs, they do the exact opposite with a 180 degree turn. In this case, since they still do not have the ability to calculate the beams, they make the upper wing of the beams slightly thinner so that it does not bend during the concreting of the beams (the reason for this is completely obvious to the experts), but they make the lower wing of the beams very weak and it is not important for them at all. It is not known what loads these beams should bear during operation.
c) Among these, there are also people who produce and implement beams that are contrary to engineering principles only out of ignorance. These people usually make joists from ready-made tables that exist in the market, but because they have no expertise in the field of calculations, they produce a type of joist for every structure and with every load and every type of porcelain blade and flooring. In other words, they have nothing to do with whether this beam should bear the load of 700 kg/m2 or 9000 kg/m2! Also, it doesn't matter to them whether the beam is made with plastofoam blocks or cement, and what the weight of the indo will be different from each other, and they produce beams with the same specifications for all residential buildings. Obviously, in this case, either the production beams will be weak, or due to the beams becoming stronger than the required amount, the cost paid by the consumer will increase.