The design of steel structure hangar roofing panel and purlin

As can charge scattered piecemeal information roofing play function, the amount of steel backward organs, regress cost. The normal amount of steel roofing project piecemeal comparison of total steel consumption is larger, because that solve effectiveness better. Purlin using unequal span deployments ranging echoes purlin care deploy distance, purlin rod length will vary, just careful installation is capable of satisfactory design requests.

The design of steel structure roofing panel and purlin, therefore proposed purlin using unequal span across deployment. Purlin deployment diminish distance on roofing end edge span, while  middle span diminish distance, to make ends roof span across two moments moment and observe the verge of, or cause the deployment of unequal span purlins, roof support reactions observed so brink.

Now generally equidistant from deployment purlin, purlin and other cross bearing on the roof is, for example, over the span of just 15M aircraft mostly gable, roof slope at 7.5M per over. Based on the deployment of purlin, roof, etc. across multiple successively by five cross-beam design, the consequences are a lot of large-span roof end span moment ratio in the mid-span cross-moment, according to the choice of end-span roof span moment, then in charge scattered across the roof useless to play a role. The line of purlin roof mount again the second seat reaction force as the basis for the second seat reaction force is gradually across the board 5 largest bearing reaction force, in order to design purlin reaction force, this time as long as the house purlin second seat panel can charge casual play a role in a lot of cross-bearing purlin ample carrying capacity, useless filling casual play.