Plots of Structures fo MALL
Our company developed plots for structures of MALL.
structural analysis
Before we open steel projected elements or other designs, the sizes and bindings of existing designs to specify in place. At the request of the Customer the structural analysis was carried out according to SP 20.13330.2016. The availability and location of the equipment is specified at the stage of RD, in connection with which the map of snow bags can be corrected.
developed project
All dismantling works are carried out according to a specially developed project of dismantling Works, which will take into account the actualstate of the existing structures. When dismantling structures, it is necessary to install temporary supports with a step of no more than 1.5 meters along the dismantling border. Temporary bracing to dismantle the device after a permanent load-bearing structures at the site of removal. The exact boundaries of dismantling are specified at the stage of RD, as well as in the production of CMP, but only in agreement with the project organization.
existing structures
The volumes of dismantling of existing structures are given for reference and are specified at the stage of RD and in the production of CMP. It is necessary to develop PPR on strengthening of the existing designs and to direct it to the design organization for acquaintance; All works on strengthening of designs it is recommended to make on the specially developed Project of Production of Works on strengthening of designs and in full compliance with it.
KR
All works on dismantle of the bearing designs to carry out under the section of KR. It is strictly forbidden to perform works on dismantle unde the section AR. All elements of the pipes should be sealed. At the free ends of the pipes to weld the plugs on the circuit. Take the weld leg equal to 1.2 t, where t is the smallest thickness of the welded elements. For welds produced at the plant, it is preferable to use semi-automatic welding in carbon dioxide or in a mixture of carbon dioxide and argon (according to GOST 10157-79*). For semi-automatic welding,it is necessary to use a welding wire corresponding to the characteristics of the electrode e-50A (wire type SV-08G2S, PP-an-8, etc.). For manual welding it is necessary to apply electrodes type e-50A according to GOST 9467-75*, the joints shall meet the requirements of GOST5264-80* and GOST 14771-76*. When welding of the steel elements of different classes to apply welding materials for the highest grade of steel to be welded. Assembly joints to perform manual welding according to GOST 5264-80*.
corrosion
The structures must be fully protected against corrosion at the factory. On the installation site is the restoration of coatings damaged during transportation, storage and installation. All structural elements, except those specified, to be made from steel of grade not less than S245 It is necessary to provide the required limit of fire resistance of load-bearing structures in accordance with section BCH. It is necessary to carry out ultrasonic flaw detection of welds in the amount of not less than 20%, with each design should be inspected every weld. The total number of welds to determine in accordance with GOST 23118-99 and the current regulatory documentation. Welding steel elements together recommended factory in jigs to prevent thermal deformation of steel structures.
Fachwerk
Fachwerk in the plate to fasten anchors through the metal plate. When performing work on strengthening to prevent damage to existing structures (burn-through welding, damage obraznymi circles). All units must pass the acceptance for compliance with the project and construction standards, as well as adopted by the act of construction supervision; All welds must be visually inspected; After welding, it is necessary to restore the corrosion protection of structures.