Cast in place staircase beam construction scheme, calculation and construction of cast in place beam

What is the specific content of the calculation and structure of the cast-in-place beam staircase, the following Zhongda consultation will answer for you.

The calculation of beam stairs includes the calculation of tread plates, diagonal beams, platform plates, and platform beams.

1) Tread board.

Generally, the diagonal beams of the beam staircase are arranged on both sides of the tread board. Therefore, the tread plate can be calculated according to the simply supported plate that is simply supported on the inclined beam at both ends, and its calculation unit can take a tread. Skin count.

The height of the plate can be converted into height, that is, h=c 2+δ cos, and the δ is the thickness of the plate, which is generally taken δ=30 40mm.

2) Diagonal beams. The diagonal beam of the flight section is usually supported on the upper and lower platform beams, and the bottom layer is supported on the ridge wall, which is generally calculated according to the simply supported beam. When the platform girder moves inward, the diagonal beam should extend from the inclined run section to the platform part, which forms a polygonal diagonal beam. Sideskin.

The loads on the inclined beams include the dead and live loads transmitted by the tread, the self-weight of the inclined beams and the stucco layer.

3) Platform plate and platform beam.

The platform beam of the beam staircase is calculated according to the simply supported beam supported on the burning head of the transverse wall of the stairwell. The loads it bears include the concentrated load from the inclined beam, the uniform load from the platform plate and the self-weight. Due to the asymmetry of the load on both sides of the platform girder, the platform girder also bears a certain torque action, which is often not considered in the calculation, but the stirrups should be properly encrypted.

The platform beam is an inverted L-shaped cross-section, considering the asymmetry of the cross-section when it is subjected to bending work, the effect of the flange can be ignored when calculating, and the rectangular cross-section with the width of the rib is approximated.

Summary. Dear, yes! It is feasible to cast stair beams by planting reinforcement for the following reasons:

1.The stair girder can be poured by planting reinforcement to realize the concrete penetrating into the bridge foundation and avoid the mixing of organic matter. 2.The stair beam can be better stabilized by pouring the stair beam by planting reinforcement, and the strength is higher and the ductility is better. 3.

The reinforcement pouring technology can ensure the quality of concrete, and can well control the slump value, crushability, and anti-fluidity of concrete, so as to greatly improve the quality of concrete. 4.The stair beam can be connected to the stair beam passage and control its displacement and shape by using the planting bar, steel plate and beamless structure and reinforcement belt.

Dear, yes! It is feasible to pour stair beams by planting reinforcement for the following reasons:1

The stair beam can be poured by planting reinforcement to penetrate into the bridge foundation with concrete and avoid organic matter mixing; 2.The stair beam can be better stabilized by pouring the stair beam by planting reinforcement, and the strength is higher and the ductility is better. 3.The planting reinforcement pouring technology can ensure the quality of concrete, and can well control the slump value, crushability, and anti-fluidity of rock and qing concrete, so as to greatly improve the quality of concrete. 4.

The stair beam can be connected to the stair beam passage by planting reinforcement and steel plate and beamless structure and reinforcement belt, and the displacement and shape of the stair beam can be controlled by the burning jujube brigade.

What is the specific operation method of pouring stair beams by planting reinforcement?

The specific operation method of pouring the stair beam in the pro-planting reinforcement mode is as follows: 1. First, firstly, the prefabricated fixed positioning anchor bolt, the hinge joint is installed, and the planting reinforcement material is prepared. 2. In the second step, the hinge joint is connected with a connector, and then they together will form the structure of the stair beam, and are evenly stacked in the mold, and then the parameters of the cavity should be set, and the entrance of the cavity will be installed like a prefabricated fixed positioning anchor.

3. Then, Qiaoshen implants the steel bars in order according to the needs of the project, and then winds the implanted steel bars on the inner and outer surfaces of the mold, keeping the steel bars perpendicular to the inner surface of the mold and the outer surface flat, and then filling the filling material into the mold. 4. Finally, carry out indoor pre-pouring pouring, according to different strength TR5 requirements and reinforcement connection size, after the pouring is completed, then smooth with wire drawing, and finally enter the exchange room to check and control the pass rate.

The structural column on the first floor of the self-built house has been poured, but the stair landing beam is not reserved, what should I do?

Dear I suggest you consider the following:1Use Shinno to destroy the custom beam to take over:

Install hand-held beams on top of the concrete column and at the bottom of the floor slab to position and install the spine beams. 2.Set up cantilevering handling:

Before the beams are installed, the cantilevered components are reinforced between the concrete columns and the concrete floor slabs so that they can support the sliding support beam setup for a long time. 3.Synchronous mounting supports:

Install beams and floor slabs on the supports of the structural beam to ensure that the supports are installed synchronously with the bottom mounting beam of the floor slab.

Does it mean that you can plant reinforcement on the pillars on both sides and pour the beams?

Dear, yes!

Summary. Dear, I am glad to answer for you: the practice of folding beam staircase**A: The practice of folding beam staircase** is shown in the figure below:

Dear, I am glad to answer for you: the practice of folding beam staircase**A: The practice of folding beam staircase** is shown in the figure below:

1. According to Article 7 of P25 of GJDGZ-101-95 "National Unified Construction Project Budget Quantity Calculation Rules": the overall staircase includes a rest platform, a platform beam, a sloping plate and a connecting beam of the staircase, calculated according to the horizontal projection area of the exposed surface size shown in the figure, without deducting the stairwell with a width of less than 500mm, and the part extending into the wall is not added.

2. Therefore, the concrete area of the staircase is the same as that of the formwork [see the size shown in the figure] The expression is: s = length * width = (

Note: The length is only counted to the edge of the floor platform beam!!

The concrete engineering quantity of the TYMJ staircase is calculated by the projected area of the natural layer of the staircase in the quota, and the expression is the projection area: the TYMJ overall staircase includes a rest platform, a platform beam, a sloping plate and a connecting beam of the staircase, and a virtual wall is drawn on the outside of the stair beam to form a closed room, which is calculated in the room. Because the staircase is calculated according to the horizontal projection area, the amount of concrete is dmj*, and the staircase decoration is calculated with dmj, of course, other engineering quantities are also calculated here, such as:

This floor, wall, paint, etc.

I think it's okay to break down the stairs.