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Structural engineering column grid layout is determined by the building functions and processes , such as power plants , dry coal shed , for ease of loading and unloading coal trains need two gable end walls open , and if a large hangar , these buildings requires two gable open open , span (l ≥ 100m), two pairs of side support , and also require large column grid (a ≥ 30m), thereby forming a large span , a large column grid , two corresponding sides supported architecture. System requirements for this structure , this paper proposes \structure equivalent to \This topic has applied for national patents, inventions derived from the Ma Kejian teacher . Firstly, from the prestressing steel space development and research status leads to this topic , indicating the development prospects of this project and research significance ; secondly with other forms to compare different structures , indicating that the selection of the topic merits ; Then, from the mechanics of the pre stress levels and loads stage aspects of internal forces analysis to prove prestressed steel grid structure in the theoretical aspects of rationality ; again, using the finite element method to define the structure of the various bars , linear and nonlinear theoretical analysis ; final , demonstrated by an example of these new structures prestressed steel mesh excellent economic and technical indicators . Were introduced structural composition, structure node , and then 1/ 8, 1/ 11, 1 /12 in three different vector height ratio analysis and comparison , respectively, chord , webs , bottom chord patterns in the adult , the load state , the use of state under three different states by the force characteristics were analyzed using MSTCAD calculation software to calculate the internal forces of each rod to arrive at the amount of steel structures , finding the most reasonable vector height ratio , making structural steel amount of most provinces, get the best value for money. And a large number of illustrations , tables visually high performance three different vector than when the internal force characteristics .
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