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- Project analysis:collect design parameters, such as soil analysis, wind load, snow load, seismic load, as well as module arrangement and array installation solution, to ensure the safety of ground solar mounting system and better choose the materials of the ground screw to control the cost.
- System choice: adapt the suitable ground screw for optimal performances in pressure resistance, stability and durability.
- Simulation: guarantee mechanical properties by professional calculation, software simulation and stress tests.
- Calculation: carry out experimental calculation after statically tested for compression, tensile and horizontal loads according to stringent guidelines.
- Testing: execute trail installation before delivery, and send the report directly to customers.
- Installation: prepare area for installation device and products, apply different devices according to requirements of clients with simply and fast installation as well as time and cost reduction.
No. Ground Screw Diameter（mm） Insulation thickness（mm） Compression test （kN） Tension test kN） Horizontal test（kN） 1 PW-GS:66*650 66.0 2.0 3.00 2.00 0.75 2 PW-GS:76*800 76.1 2.0 13.50 7.00 3.50 3 PW-GS:76*1600 76.1 4.0 35.00 21.50 8.50 4 PW-GS:90*1200 88.9 3.6 30.00 16.50 7.50 5 PW-GS:90*2000 88.9 3.6 55.00 35.00 14.00 6 PW-GS:114*1400 114.3 3.6 40.00 21.00 10.00 7 PW-GS:140*1400 139.7 3.6 45.00 25.00 13.50
Comparison table between PowerScrew System and Concrete-poured foundations
PowerScrew System Concrete-poured foundations Reusable, Recyclable & Eco-friendly. Non-reusable and NOT Eco-friendly No atmospheric condition limitations except frozen soil. Limited to dry periods and temperatures above freezing point. Reduced costs, reduced delays. No land site damage or pollution. Excavation required, land site damage, long delays and limited life expectancy. Clean, no excavation needed for auger-driving operation. Leftover soil, excavation is required, Heavy concrete mixers - damage to lawn and asphalt driveways. Minimal equipment required, easy handling. One man job - most of the time Multiple pieces of equipment, more than one worker on site. One piece of equipment, fast guaranteed professional installation. Excavation, formwork, concrete and many hours for installation. Often no guaranty. Build site planning is reduced to marking for exact location and desired height. A full-time on-site manager to plan operations and direct work.
Powerway's Hot-Dip Galvanized Technology for SteelThe hot-dip galvanized layer has much stronger protective effect compared to paint or plastic layers. While hot-dip galvanizing, an alloy layer is created because of the diffusion of zinc and steel. This layer will not fall off until be natural corroded completely while exposed under the atmosphere for several decades.
Powerway firstly processes the steel member, and then performs hot-dip galvanizing technique. Therefore, the anti-corrosive ability and durability are higher than discontinuous and none hot-dip galvanized steel member. Firstly shape and process the steel member, then perform surface cleaning, heat treatment, hot-dip continuous plating, accelerated cooling and other complex procedures under rigorous quality control and modern computer monitoring, finally, create flawless end product with a zinc layer. It can prevent buckling, punching, trimming after galvanizing so that avoid being corroded ahead of time.
hot-dip galvanized standards
This specification covers the requirements for zinc coating (galvanizing) by the hot-dip process on iron and steel products made from rolled pressed and forged shapes, castings, plates, bars, and strips.
This specification covers both unfabricated products and fabricated products, for example, assembled steel products, structural steel fabrications, large tubes already bent or welded before galvanizing, and wire work fabricated from uncoated steel wire. This specification also covers steel forgings and iron castings incorporated into pieces fabricated before galvanizing or which are too large to be centrifuged (or otherwise handled to remove excess galvanizing bath metal).
Note 1—This specification covers those products previously addressed in Specifications A 123-78 and A 386-78.
This specification does not apply to wire, pipe, tube, or steel sheet which is galvanized on specialized or continuous lines, or to steel less than 22 gage (0.0299 in.) [0.76 mm] thick.
The galvanizing of hardware items that are to be centrifuged or otherwise handled to remove excess zinc (such as bolts and similar threaded fasteners, castings and rolled, pressed and forged items) shall be in accordance with Specification A 153/A 153M.
Fabricated reinforcing steel bar assemblies are covered by the present specification. The galvanizing of separate reinforcing steel bars shall be in accordance with Specification A 767/A 767M.
This specification is applicable to orders in either inch-pound units (as A 123) or SI units (as A 123M). Inch-pound units and SI units are not necessarily exact equivalents. Within the text of this specification and where appropriate, SI units are shown in parentheses. Each system shall be used independently of the other without combining values in any way. In the case of orders in SI units, all testing and inspection shall be done using the metric equivalent of the test or inspection method as appropriate. In the case of orders in SI units, such shall be stated to the galvanizer when the order is placed.