Steel structures, structural steel building, mobile house, steel buildings, prefabricated houses, section steel, steel workshop


You are here >> the Optimal Design of Portal Frame

The optimal design of Portal Frame

Subscribe to our mailing list

Subscribe to our steel structures newsletter, get our FREE catalogue and free WHITE PAPER.
Our products: Steel structures, prefabricated house, container house, steel villa, steel building, steel silo.
Join now our VIP services only USD99.00/project or US$990.00/Year
You will get our VIP Quotation & Design Services..
Join now, E-mail us now!! and remit to our paypal or bank account.
Just pay US$99.00/project. and you will save lots of time of designing and inquirying. Free is the most expensive product in the world,
you can be our boss when you pay US$99.00/project or US$990.00/Year


Steel quantity of Portal Frame is  related to with Structural Style , Loading , seize of buildings , quality of steel and others , the Construction seize mainly including the Span of  frame , distance of column , height of eave , and Slop of roof , When initial condition confirm of the Project , should find economic and resonable condition in the variable condition .
1)Crane or Working load  are  major factor of column space , When big loading , the column space should small , 6—7.5m is good  , generally is 6m , Small loading the column space used 8—10m , general 9m , increase the column space should comprehensive consider the influence wall purlin and roof purlin for the price .
2)The Span of Frame have the Optimal seize , mainly influence factor are Loading , small loading , 24—36m span is good , big span , economic span is 18—24m .
3)The Stress control of  Steel frame , Steel Structural , structural calculation general used computer program analysis , the Steel frame on the condition of stable ,the stress control of steel parts in the range 0.90—0.95 , The Steel Structural such as cross section of beam height should more high , decrease the thickness of Web plate , that can decrease the steel quantity . when steel frame a little high , general control by stability stress , now can add strong tie bar on the middle of column , decrease calculate height of column .
4) Fly bracing can decrease the length of  rigid frame , when cross section of beam more high , stability stress is control factor , Fly bracing can stop the instable because  beam pressed . the space between two fly bracing is twice as the space of purlin .
5) Frame Structural better used one kind of steel , consider from the economic , when the strength is major factor , used Q345B , when stable is major factor , used Q235B ,  Q345 can more save 15%—25% than the Q235 .
6)The connection of steel column have two kinds : knuckle joint and rigid connection , generally no crane , the steel column used rigid connection , when the workshop have complex requirements , the column used knuckle joint .



Hot Products

Prefabricated Building Latest NewsSteel Structure Project KeywordsDownloadPrices