門式腳手架除了結構穩定、承載力大的特點，在使用時必須增加一些構造措施，才能增強門架的支撐能力，這也是門式腳手架能夠做到安全不倒的訣竅。高度在4.5 m以上的高支模在施工前必須由施工單位編制專項技術方案。技術方應包括模板及其支統的設計、搭設及拆除，混凝土澆筑方法，澆筑過程觀測及安全控制要求等方面內容。沒有編制技術方案的不得施工。此外，門式腳手架產品的輕型化使得它拆裝方便，也就減輕了建筑工人的勞動強度，腳手架的設計趨向輕型化，選用內外源動性鋼管，在生產環節的鋼材耗材量比傳統的鋼管式腳手架節約40%以上。因此，在建筑施工拆裝方面減輕了作業人員的勞動強度，使他們在作業中沒 有那么累，精神狀況也就相對好了，安全系數自然上升。
In addition to the characteristics of stable structure and large bearing capacity, some structural measures must be added to enhance the supporting capacity of the portal scaffolding. This is also the knack of the portal scaffolding to be safe. High formwork with a height of 4.5 m or more must be prepared by the construction unit before construction. The technical side should include the design, erection and demolition of formwork and its branches, concrete pouring method, observation of pouring process and safety control requirements. No construction shall be carried out without drawing up technical plans. In addition, the portal scaffolding product lightweight makes it easy to disassemble and assemble, which also reduces the labor intensity of construction workers. The design of scaffolding tends to be lightweight. The steel consumption in production link is more than 40% less than that of traditional steel tube scaffolding. Therefore, in the construction of disassembly and assembly to reduce the worker's labor intensity, so that they are not so tired in the operation, mental health is relatively good, the safety factor naturally rises.
門式腳手架安裝有自己的標準，要整齊劃一，并在相互垂直的兩個方向上有保證其穩定的支撐系統，在搭設之前要在實地按設計要求嚴格放線。門架支撐安裝時要求每安裝一層門架就要加一道48 x 3.5鋼管水平拉桿將其扣住。縱橫向垂直 剪刀撐按間距小于6m布置。門式鋼管腳手架支撐受力主要靠支撐架整體受力，要發揮這種整體效應，就要靠縱橫向水平拉桿和縱橫向垂直剪刀撐將各榀單薄的門架“捆綁” 連接起來。如果不設置縱橫向水平拉桿和縱橫向垂直剪刀撐，就好像筷子一樣容易折斷，門架支撐就極易坍塌，這種情況必須杜絕。可調托座（底座）調節螺栓伸出長度不宜大于200 mm，當可調托座（含底座）的螺栓伸出長度大于200 mm時，可采取增加一道水平拉桿的固定措施。許多操作工人不了解這一點， 把螺栓擰出較長，又不采取措施加固，使門架受力大打折扣，往往導致坍塌事故發生。
Portal scaffolding installation has its own standards, to be uniform, and in the two directions perpendicular to each other to ensure the stability of the support system, in the field before the installation of stringent line according to the design requirements. When the portal support is installed, it is required that a 48 x 3.5 steel pipe horizontal tie rod be added to each floor of the portal frame to fasten it. Longitudinal and transverse vertical scissors are arranged in spacing less than 6m. The support force of portal steel tubular scaffolding mainly depends on the overall force of the support frame. To exert this overall effect, it is necessary to "bundle" each thin portal frame by means of longitudinal and horizontal horizontal horizontal tie rods and vertical and horizontal scissors. If there is no vertical and horizontal horizontal tie rod and vertical scissors brace, it is as easy to break as chopsticks, and the portal frame support is very easy to collapse. This situation must be eliminated. The extension length of adjustable bracket (base) adjusting bolt should not be greater than 200 mm. When the extension length of adjustable bracket (including base) bolt is greater than 200 mm, a fixed measure of adding a horizontal tie rod can be adopted. Many operators do not understand this point. They twist the bolts out for a long time without taking measures to reinforce them, which greatly reduces the stress of the portal frame and often leads to collapse accidents.
連接構建方面，門架的各種連接扣件螺栓擰緊扭力矩在40~65 N-m之間，以防構件不能有效承 力或被破壞，搭設完成后用扳手隨 機抽樣檢查，不合格的必須重新擰緊，直至合格為止。不允許缺少連接構件或螺栓擰而不緊或在安裝后隨意拆卸，使門式腳手架發生變形 而受到破壞。支撐立桿要垂直，縱橫向水平桿要平整。立桿應盡量采 用通長鋼管，如需接管，接頭要錯開，不在同一步距內，立桿口必須按規 范對接，確保架體垂直度。相鄰的兩根縱向水平桿的接頭要互相交錯，接駁口必須按規范對接。
In connection construction, the bolt tightening torque of all kinds of connection fasteners of portal frame is between 40 and 65 N-m, in order to prevent members from being effectively loaded or destroyed, random sampling inspection with spanners after erection is completed, and unqualified fasteners must be tightened again until they are qualified. It is not allowed to lack connection members or bolts to be screwed tightly or to be disassembled at will after installation, so that the portal scaffolding will be deformed and damaged. The supporting poles should be vertical and the horizontal and vertical poles should be flat. The vertical pole should be as long as possible. If the pipe needs to be taken over, the joint should be staggered and not in the same step. The vertical of the vertical pole must be docked in accordance with the specifications to ensure the verticality of the frame. The joints of two adjacent vertical horizontal poles should be interlaced with each other, and the joints must be docked in accordance with the specifications.
Accident rescue measures
If there is a scaffold collapse accident, don't blindly rescue. If there is an emergency that endangers the safety of electricity use, the power supply should be cut off immediately. When it is confirmed that there is no danger of continued collapse, rescuers should be organized and effective measures should be taken to rescue. First, the injured should be rescued, and then property should be rescued. Only by paying attention to these matters and adopting these structural measures to strengthen the support of portal scaffolding, can the portal scaffolding play an effective and safe role, and can it prevent workers from falling at high altitudes to the utmost.
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