Gutter is an essential component of the roof drainage system, gutter is mainly used to temporarily collect rainwater, drainage through the timely discharge. Try to use plug gutter, small size, but also when the cornice trim. Appropriate color, installation of sophisticated gutter and finishes will undoubtedly give the entire project a lot of decorative color。
Gutter production and installation of the common problems
(A) The advantages and selection of steel gutter
In large plants, steel gutter steel consumption is also a large part, but the gutter has its own advantages, the wind load in coastal areas generally larger. If the use of color gutter, under the action of a strong wind load, the color gutter appears fragile, easily swept away by the wind suction, and the design of steel gutter also has a great impact on its durability, so Steel gutter design and selection can not be ignored. The company is located in:
The most commonly used gutter materials are 1.2mm, 2mm or 2.5mm thick stainless steel, 3mm or 5mm thick galvanized steel and are based on the importance of the building, the cost, and the grade of other materials used.
General civil construction gutter depth of not less than 250mm, according to the bottom of the roof and the top of the roof clear clearance is reasonable to determine, to consider the gutter slope required space. To determine the width of two factors to consider: First, to calculate whether the drainage can pass; Second, the commonly used gutter width of 1.0m, 1.2m and 1.5m three specifications, as far as possible reasonable use of the plate, the required high building must Design the gutter to be scalable.
(B) Color gutter lap junction leakage treatment
Gutter plate overlap 100mm can be lap joints at the use of rivets connection, if you want to ensure gutter watertight, then use a waterproof plastic hit. Specific approach is to patch the gutter color plate, applied to two neutral silica gel (acid and alkaline glue can not be used, with the color plate compatibility and durability have a problem), respectively, Then the edge of the two plates 10mm, and two waterproof rivets fixed overlapping parts.
Each waterproof rivets center distance of 80mm, two wrong distribution, rivets should hit the sealing line. Note that the rivet should be waterproof and should not be pulled through the middle of the rivet.
After such meticulous construction there is also the problem of leakage may not be filled with silica gel, rivet rust wear; pull rivets at the color steel plate rust wear; silicone failure.
Silicone failure is mainly due to ultraviolet radiation led to the fracture of the polymer chain, good silica gel in the life of the plate should be very long. The company is located in:
(C) Steel gutter sagging treatment
In the construction of steel gutters, it is sometimes found that when the gutter is large and the gutter thickness is small, gutter deflection occurs. The solution is:
1. Under the gutter set up a long tie-line and do gutter support, to ensure that it will not sag, or below the support. The best welding gutter, the middle of a larger slope, the installation, try to avoid walking in the gutter, so as not to scratch. The company is located in:
2. With the combination of welding gutter, gutter to the arch from both ends of a certain slope can completely solve this problem, but the non-straight will inevitably cause gutter processing costs increase.
(D) Gutter and downpipe
The size of the steel gutter and the roof area is not much, the height of the steel gutter and the height of the purlin can be consistent. The main thing is the number of rain pipes. Rainwater pipe water area is generally 110mm diameter rainwater pipe water area not more than 180m2. The rest is based on this calculation. This will not appear in the ditch water overflow. If you need the exact value to be calculated according to the formula. The company is located in:
(Five) Gutter need to find slope
Plate gutter can theoretically be looking for slope, the provisions of the five thousandths. However, few steel companies will find the slope, the node is not equal processing is more troublesome. In fact, looking for slope gutter, I have always considered the concept of concrete gutters, concrete gutter due to the larger coefficient of friction, poor drainage, so look for slope. The steel surface is far more smooth than concrete, the resistance to water is small (friction coefficient is small), and because of the stiffness of the steel gutter, if the stainless steel gutter, gutter bracket will generally be added, and water will gradually discharged, the load is more Small, flexible and not great, so even if there is water, but also very small, will soon be volatile. And rainfall in the northwest itself is quite small, from this aspect to consider gutter without looking for slope. In addition, the outer gutter plays a decorative role, looking for a gutter after the slope is difficult to be neat and tidy when installing the outer edge, so the outer gutter need not look for a slope. The company is located in:
In fact, the gutter to find slopes is also very difficult, especially about 9m using steel gutter, there will be crossed in the deflection, resting on top of the column will be higher, down the pipe can not be done in the span, even with chlorine Butadiene waterproof layer to find slope back, only a little flat, so the general situation just finished rain to the roof to see there will certainly be a water plot in the depression, so we repeatedly require the corrosion performance of steel gutters must be better. While the color plate gutter is not easy to find slopes, you can get through the calculation of such data, according to a minimum of five per thousand to find the slope, if a 9m downfall, gutter height difference needs 45mm. This is hard to make, and gutting laces are hard to handle.
If the rainy areas in the south, it is recommended to find the slope gutter 2%, so you need to pay attention to the design and production, the design of a gutter section at both ends of a high and low points, steel cutting is to cut according to the slope , The production of high cross-section and high cross-section welding, low cross-section and low cross-section welding, you can make a long slope of the gutter. The company is located in:
In a word, whether the gutter looks for the slope, according to the local climatic conditions, in the rainy area of the south, it can not refuse the gutter due to the difficulty of looking for slope. Combining with the construction norms, according to the maximum practical project, can we make the perfect. The company is located in:
(F) Steel gutter in the design of improvements
In the field of construction can find a lot of design is wrong, to the manufacture and installation of a great deal of trouble, such as the combination of gutters in the design of the gutter, designed with the old gutter design, installation sometimes give construction Bring inconvenience, the gutter floor and the outer board why 90 degrees to direct it? 90 degrees straight gutter, gutter in the upper edge of the bracelet reinforcement, the gutter outer plate in the middle of a slight uplift, gutter panel installation can not be close. When the outer plate and the bottom plate are tilted outward by a certain angle, the installation of the gutter edge will be facilitated. The installation of the large gutter under the gutter will neglect the heave height and will not easily adhere to the dust and reduce the cleaning frequency. Although it is a small discovery, it reduces a lot of manpower and financial resources
(VII) Imagine developing a new material gutter
Gutter is one of the most difficult materials in the steel structure plant. At present, steel plates, color plates and stainless steel plates are commonly used. I think it is not the best - either not good for corrosion prevention or poor connection. In fact, gutter in the project has always been a difficult problem, steel gutters are often due to the production and installation of non-standard, waterproof leakage has been done unsatisfactory. Therefore, the development of new materials, gutter is necessary. Is it possible to use plastic under the purlin to complete the gutter structure. I think it is possible, or to use the thermal spray hard plastic to cover the steel gutter to complete the desired process.
In summary, in the steel roofing maintenance system, gutter to play its due function, play a good decorative effect, should follow the following principles:
1. Design rationality. Design should be in accordance with the norms, according to the local environment, the size of the roof area, design practical, economical and beautiful gutter. The company is located in:
2. Strict quality control. Starting from the lofting accounting size, reduce errors, to avoid the production of deformation of the components. The company is located in:
3. Fine installation. Skilled and meticulous installation will make the decorative effect totally natural.