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1.安裝前*須保證骨架的平整和清潔；

2.先檢查板材的裁切尺寸和膨脹預(yù)留量是否合格，要特別注意留出足夠的均勻的膨脹間隙，計(jì)算公式如下：

總膨脹間隙＝膨脹系數(shù)×當(dāng)?shù)匕惭b前后*大的溫差×板材長(zhǎng)度

膨脹系數(shù)為7.0×10-5mm/mm.K

3.板材熱脹冷縮系數(shù)與支撐框架不同，且需要留余量以承受風(fēng)壓、雪壓等，因此嵌入量要預(yù)留充分，以及熱脹冷縮的空間。一般板材邊緣伸入固定框架25mm以上，并至少有二條筋肋安裝時(shí)固定區(qū)域；熱脹冷縮一般每米留3mm空隙;

4.認(rèn)明板材表面防紫*線的一面，并把該面朝外安裝，*不允許把防紫*線的一面朝內(nèi)安裝；

5.在安裝板材時(shí)，板材上所覆保護(hù)膜會(huì)影響填縫料與板材的結(jié)合,所以在安裝前把板材四周的保護(hù)膜揭起5～10cm，不要讓型材夾住保護(hù)膜，但也不可揭起太多，以免因操作而損傷板面；

注意：有些工人操作時(shí)把保護(hù)膜夾在型材里，然后用鋒利工具劃印再揭起，但往往劃傷板面而導(dǎo)致板材破壞；

6. 永信中空板材冷彎安裝的情況下，其彎曲半徑不得小于板材厚度的175倍；

7. 永信中空板材只能順肋筋方向彎曲；

8. 永信中空板材傾斜安裝應(yīng)順肋筋方向，有利于冷凝水導(dǎo)出；

9. 如須在板上直接固定自攻自鉆釘，須擴(kuò)孔，所有鉆孔直徑應(yīng)大于螺栓直徑，留出熱脹冷縮間隙；故在材板開(kāi)孔時(shí)，孔徑須比螺絲直徑大百分之50左右，在彎曲部分避免鎖螺絲，以免造成裂板；

10.自攻螺絲擰緊時(shí)用力要均勻，確保型材真*壓實(shí)密封膠條和板材；

11.所有孔隙應(yīng)以中性密封膠填充，并以中性密封膠膠涂敷外露部分以防止清潔劑滲入邊緣，防止延發(fā)性龜裂；當(dāng)發(fā)現(xiàn)安裝缺*陷時(shí)，在可能發(fā)生滲漏的部位可加以密封膠進(jìn)行彌補(bǔ)。選用密封膠要選用固化后仍保持柔軟、低模數(shù)、延伸率大于50％的中性耐候硅酮膠，施膠前一定要使鋁型材及板材的表面清潔和干燥，做到無(wú)油污、塵土、水汽、露珠及其它雜物，施膠要均勻，膠層表面光滑，斷面尺寸一致并不得有間斷現(xiàn)象；須特別注意的是所使用的中性密封膠必*提前與板材做相容性試驗(yàn)，以避免與板材發(fā)生化學(xué)反應(yīng)；

12.孔的中*到板材邊緣間距應(yīng)大于等于5cm;

13.板材安裝全過(guò)程中嚴(yán)禁足踏板面，操作時(shí)須使用跨越板材的可移式踏板；

14. 永信PC板剪裁長(zhǎng)度務(wù)必大于寬度才可彎曲；

15. 永信板材安裝好后要求立即揭掉保護(hù)膜，如因施工特殊要求保護(hù)板面，也須先揭掉保護(hù)膜，而后重新覆蓋；

16. 永信板材安裝好后應(yīng)進(jìn)行自檢，特別要認(rèn)真做噴淋試驗(yàn)，檢查是否漏水，如有漏水隱患應(yīng)及時(shí)消*，然后再檢查外觀質(zhì)量；

Correct installation method of Yongxin sunshine board:

1. Before installation, * the framework must be flat and clean;

2. First check whether the cutting size and expansion reserve of the plate are qualified, and pay special attention to leaving enough uniform expansion gap. The calculation formula is as follows:

Total expansion clearance = expansion coefficient × * large temperature difference before and after local installation × Plate length

The coefficient of expansion is 7.0 × 10-5mm/mm. K

3. The coefficient of thermal expansion and cold contraction of the plate is different from that of the supporting frame, and allowance needs to be left to bear wind pressure, snow pressure, etc., so the embedding amount should be reserved enough and the space for thermal expansion and cold contraction should be reserved. Generally, the edge of the plate extends more than 25mm into the fixed frame, and there are at least two ribs in the fixed area during installation; Thermal expansion and cold contraction generally leave 3mm gap per meter;

4. Identify the side of the anti purple * line on the surface of the plate and install it outward, * it is not allowed to install the side of the anti purple * line inward;

5. When installing the plate, the protective film covered on the plate will affect the combination of joint filler and plate. Therefore, lift the protective film around the plate for 5 ~ 10cm before installation. Do not let the profile clamp the protective film, but do not lift too much to avoid damaging the plate surface due to operation;

Note: some workers clamp the protective film in the profile during operation, and then scratch it with sharp tools and then lift it up, but it often scratches the board surface and causes damage to the board;

6. When Yongxin hollow plate is installed by cold bending, its bending radius shall not be less than 175 times of the plate thickness;

7. Yongxin hollow plate can only be bent along the rib direction;

8. The inclined installation of Yongxin hollow plate shall be along the rib direction, which is conducive to the export of condensate;

9. If it is necessary to directly fix the self tapping and self drilling nails on the plate, the holes must be enlarged. The diameter of all holes should be greater than the diameter of bolts, leaving a gap between thermal expansion and cold contraction; Therefore, when opening the hole in the material plate, the hole diameter must be about 50% larger than the screw diameter. Avoid locking the screw in the bending part to avoid cracking the plate;

10. The self tapping screw shall be tightened with even force to ensure that the profile is really * compacted with sealant strip and plate;

11. All pores shall be filled with neutral sealant, and the exposed parts shall be coated with neutral sealant to prevent detergent from penetrating into the edge and prevent delayed cracking; In case of installation defects, sealant can be used to make up for possible leakage. Neutral weather resistant silicone adhesive with soft, low modulus and elongation greater than 50% after curing shall be selected for sealant. Before sizing, the surface of aluminum profile and plate must be clean and dry to ensure no oil stain, dust, water vapor, dew and other sundries. The sizing shall be uniform, the surface of adhesive layer shall be smooth, the section size shall be consistent and there shall be no interruption; Special attention should be paid to the compatibility test between the neutral sealant used and the plate in advance to avoid chemical reaction with the plate;

12. The distance from the middle * of the hole to the edge of the plate shall be greater than or equal to 5cm;

13. During the whole process of plate installation, it is strictly prohibited to foot the tread, and the movable pedal crossing the plate must be used during operation;

14. The cutting length of Yongxin PC board must be greater than the width before bending;

15. After the Yongxin plate is installed, the protective film shall be removed immediately. If the plate surface is required to be protected due to special construction requirements, the protective film shall also be removed first and then covered again;

16. After the installation of Yongxin plate, self inspection shall be carried out, especially the spray test shall be carried out carefully to check whether there is water leakage. If there is any hidden danger of water leakage, it shall be eliminated in time, and then the appearance quality shall be checked;