گروه مقاله : مقالات و انتشارات
تاريخ انتشار : 1396/08/02 - 00:11
كد :365

Uboot FAQ

What is difference between signifiers voided (U-Boot) and normal voided slab?
A typical voided slabs that has long been used in the construction industry, the number of orthogonal beams placed on a concrete slab layer, is formed. This combination creates beams with T-shaped cross-section will be designed to withstand loads. Floor slabs caved in two (U-Boot), in addition to high slab, covered with a layer of reinforced concrete bottom of orthogonal beams and causing the I-shaped cross-section. This change also increased the difficulty of the slab, causing the slab to be seen from under the bed.

What is economic between voided slab (U-Boot) compared to conventional systems of the ceiling?
A: The use of technology voided slabs (U-Boot) to create advantages such as large openings, flat slab, lower height and more. If this is not advantageous for architectural design, the use of this technology is not recommended.

Is time running voided slab (U-Boot) is different than conventional slab?
concrete is normal and in accordance with national building regulations ninth topic.

The largest crater is covered with voided slab (U-Boot) is how much?
Answer: According to studies and technical documentation, technology voided slabs (U-Boot) able to cover the openings of up to about 18 meters. It should be noted that, when combined with the technology of prestressing there is the possibility of increasing openings

What is difference between rigidity aperture in the roof voided slab (U-Boot) compared to conventional systems of the ceiling?
Answer: Because the thickness of the slab voided (U-Boot) is higher than conventional slab, roof rigidity with voided slabs (U-Boot) from the floor with a solid slab of concrete with the use of similar, higher and a better ability to transfer load resisting system side.

what regulations used in Iran to design voided slab U-Boot  ?
A: According to the technical approvals issued by the Building and Housing Research Center for designing and ceiling can be fathers -2800 ACI- bylaws and national building regulations ninth threads used.

what is performance voided slab (U-Boot) in corrosive environment like?
A: To protect voided slabs (U-Boot) corrosion, often referred to in the ninth issue of national building regulations is necessary and sufficient.

what steel molds are used in the voided slab U-Boot ?
A: The format used in the voided slab (U-Boot) from new or recycled polypropylene and is based on standard British BBA

Is it possible to combine voided slab system (U-Boot) with prestressing technology there?
A: Yes, you can combine voided slab system (U-Boot) with prestressing technology there.

What is the advantages of voided slab U-Boot ?
A: The use of voided slab technology (U-Boot) in buildings can be one or more of the following advantages: – create larger openings – Create flat slab and remove columns – reduce the total height of the building – Increase shelf space classes – reducing thin Operations work – speed run – reducing the manufacturing cost.

Whether to run voided slab (U-Boot) require special equipment or expertise is?
Are the materials used in these slabs are a special feature?
A: The materials used in these slabs of concrete, rebar and form is U-Boot. The strength of concrete and rebar is determined by the design of structures usually considered to be like the rest of the concrete structure.

what kind of software is used in this type of roof structural design ?
A common software for designing these projects usually like Etabs, Safe, Sap is used.

How much is the dimensions of U-Boot format used in the voided slab ?
Re: U-Boot format 52 cm in length and 52 in width and height are variable. For information on the specifications of the templates refer to the section.

Is it possible to build U-Boot format with other materials or dimensions is new?
A: As I mentioned, these templates in the Building and Housing Research Center examined and it was determined criteria. Therefore, it is not possible to change the dimensions and materials.

What is the fire ceilings resistance voided (U-Boot) ?
Re: U-Boot as the format of at least 5 cm layer of reinforced concrete and protected them from the fire protection standard based enslaves Europe (behavior against fire) this ceiling fire resistance capability with a temperature of 1000 ° C in their time of 3 hours.

Is it possible to concrete ceiling mounted fittings and pendant chandelier and expects to install ducts for the installation of suspended ceilings and air conditioning systems exist?
A: 1. The use of glass to concrete placement
In this way, the steel plates (plates) on the back of a U-shaped welded rebar, is used.
2. Use the plate after concrete placement
In this method, after opening the roof forms, plates with special nails that are by guns under their roof and bars is expected to be welded.
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Please explain how to model structures with U-Boot in the application etabs.
A: In the design of structures with voided slab roof (U-Boot), like other buildings with slab system (conventional reinforced concrete slabs, slab Prestressed etc.) commonly used software Etabs and Sap. Nyzba roof design software Adapt Safe and carried out. U-Boot in the design of these structures first slab in a sketch in the application model and its thickness is determined safe. It should be noted as software capable of modeling the slab to be safe is not hollow, U-Boot slab with a solid slab that same difficulty, is equivalent. The weight of the concrete slab, zero and U-Boot according to the actual weight of the slab dead load placed on the roof..

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