Light curtain grounding requirements and construction of glass curtain wall
(1) According to the technical information about lightning protection and grounding combined with the experience of previous completion projects, we believe that glass curtain wall lightning protection must meet the following requirements in several important aspects: The lightning protection design of the glass curtain wall shall comply with the relevant provisions of the current national standard "Code for Lightning Protection of Buildings" (GB500057-94). The vertical main keel of the glass curtain wall shall be regarded as the down conductor, and the cross section of the vertical main keel shall be 100 mm2 when used for flat steel products. In addition to the welding method, the thickness of the metal material should be 4 mm by crimping. The length of the round steel overlap is 6 times of its diameter, and it is double-sided welded; the length of the flat steel overlap is 2 times its width, and the welding is performed on three sides; the welded joint is treated with anti-corrosion treatment. Different metal crimping, anti-electrochemical corrosion treatment. For example, when steel is connected with aluminum, the steel should be tinned; or stainless steel gasket should be added between steel and aluminum. After the completion of the construction, an authoritative testing organization is required to perform the test, and the grounding resistance value required by the design and specifications must be met. (2) The method of lightning protection and grounding of a glass curtain wall of a building The building has 22 floors above ground and 80 meters high. The exterior wall uses large-area granite hanging panels, glass curtain walls and composite aluminum panels. The following describes the specific practice of lightning protection and grounding of its glass curtain wall: Starting from the sixth floor, nine floors, twelve floors, fifteen floors and twenty-two floors, each layer is laid with a 40×4 galvanized flat steel on the surface of the structural slab around the building, and with lightning protection around the building. The lower-row lead-out steel bar (Φ12) is welded, the welding length is 6 times the diameter of the round steel, and the double-sided welding and welding are used to brush two anti-rust paints (after the welding, two anti-rust paints are brushed), thus forming a uniform Pressure ring. In order to keep the glass curtain wall vertical aluminum alloy main keel to be grounded, one end of the 40×4 galvanized flat steel is welded with the equalizing ring, the welding length should be twice the width, and the three sides are welded, and the other end is used twice. M8 stainless steel is pressed against the vertical main keel by bolts. In order to prevent the electrochemical corrosion of galvanized flat steel and aluminum alloy, a 1mm thick stainless steel gasket is added between them, and a stainless steel flat pad and spring pad are added. The joints of all vertical main keels are crimped with a retractable "ohmic bend" made of 40×4 aluminum alloy. The joints are crimped with two M8 stainless steel upper and lower bolts, and a stainless steel flat washer is added. Spring pad. Set the joint of all vertical main keels and transverse keels on the floor of the pressure equalizing ring. Press the two bolts of M6 stainless steel through the 40×4 aluminum corners at both ends, and add stainless steel flat washers and spring washers. The cover of the parapet wall at the top of the curtain wall is a lightning receptor that acts as a lightning guide. The φ12 galvanized round steel is installed along the circumference of the parapet wall and welded to the main structure lightning protection down conductor. 40×4×4 galvanized angle steel is installed on the inner side of the cover plate. Two pieces of angle steel (each length is 300mm) are installed on each aluminum plate, and the two sections are welded and connected by φ12 galvanized round steel. One end of the φ12 galvanized round steel is welded with the φ12 galvanized round steel at the top of the daughter wall, and the other end is welded with the angle steel. Each angle between the angle steel and the aluminum plate is crimped with four M6×20 stainless steel self-tapping screws (a 1 mm thick stainless steel gasket is placed between the angle steel and the aluminum plate), and a stainless steel flat pad and a spring pad are added.
How to Select the Best Grow Light for your Greenhouse?
What' the best indoor led grow light ?The definition of Philizon :
Item Display
Full Spectrum Indoor LED Grow Light and High PAR
Application
Our professional full spectrum Indoor LED grow light are suitable for all the indoor plants and good for seeding, growth,flowering and fruiting stages of plants, increasing the harvest and Saving energy.
Philizon Indoor LED Grow Lights by Light Efficient Design provide growers a better solution for reliable and effective agricultural lighting. Light Efficient Design has been making LED retrofit lamps for over six years, and has a strong product lineup, proven designs, and excellent reliability. And now, our energy-efficient, money-saving products are helping to promote success in indoor farming and commercial greenhouses.
Warmly welcome to take a visit on our Company at any time.
Indoor Led Grow Light,Popular Indoor Led Grow Lights,Popular Indoor Grow Lights,Urban Farming Grow Lights Shenzhen Phlizon Technology Co.,Ltd. , https://www.szledaquariumgrowlight.com
The plant needs light to thrive cause the light is essental for photosynthesis.without it,plants can not make food.but light can also be too intense,too hot or last too long for growing healthy plants.plant growth accelerates with abundant light because more of the plant`s leaves have exposure,which means more photosynthesis.in the winter,days are not long enough,but many plants still need 12 hours or more of light per day.
Now,adding LED Grow Lights to your greenhouse is an nice choice if you live in the north, and can not get enough daylight in winter.you might be take HID into consideration,cause it has high output and cover a wide area.but now,we providing you some dfferent.the newest type of grow lights use LED technology.
Provides Maximum Light Density and optimizing spectrum(410nm-740nm,white)
as we know that the plants need more light from the blue side of the spectrum during their seedling stage and when developing foliage and require light from the orange to red side of the spectrum while inblooming and fruiting phases. We adopting lastest intergrated COB technology, white , more red and blue PAR(410-740nm) per Watt than any other lighting fixture for the best color uniformity.
Dual Veg and Bloom for plant growth and bloom
the Led grow lights feature selectable VEG and BLOOM light spectrums to deliver maximum performance from seeding through the flower stage and finally harvest.
Increase yields and potency
using high quality lense that hyper-focus the lights on your canopy.the photons are beamed directly to the plants.this gives growers the ability to get greatest possible crop yield.
Reduce your costs with energy efficiency
energy-efficient cannabis grow lights cost between 40%-60% less to operate compared to HID lam year.
Led grow light also eliminate the needs for ballasts and reflectors while they minimize the cooling systems,accelerating your payback.you will see the electrical bills trimmed by approximately half,year after year.
Installs and operates simply
the input voltage is AC100V-240V,fit for the world standard,built-in power supply.do not need other equipment,just access to the Plug,the lamp will be work smoothly. The led grow lighting is small size,just few inches and easy to install.it is the good option for some greenhouse.
Long lifespan
using built-in quiet fans and the shutter in the wind,induced draftfrom all sides.runs with quiet. Useadvanced isolation power supply and soft start protection technology, to prevent the high voltage when turn on the light from damagingthe lamp body.
Safe and Reliable(Meet the safety requirments around the world)
Effective(Good efficacy for the plants)
Energy Conservation(High efficiency and high PPFD in same power)
Long life(Use long life span elements)
Soft and comfortable lights(No Harmful,Flicker free,protect your eyes)
Features
- Water-cooling design, 20°C+ lower than fan-cooling design
- Vac100-265 universal input voltage
- Advanced secondary optical lens design for penetration
- Smart over-heat protection system
- Product designed to ETL standards
- Completely noise-free with water-cooling system
- Effectual spectrums proven by professionals
- Quick slide-into-track system to combine two or more LED fixtures together
