Rectangulum cavum sectionem

Rectanguli cavum sectiones aut rec tubi frigus formatae et studium aut calidum advolvit, frigus advolvit, pre-galvanized et immaculatam ferro.

Ut formare ad rectangulum ferro sectionem opportunitatem mater tube, a circum ferro fistulam, habet formatae prima. Ex a rotunda rotulis sunt, ut successive premere per fistulam in rectangulum cavum sectionem. Haec omnia factum. Eg per fistulam cum extra diameter 101.6 est in an 80x80 platea fistulam.

Quadratum et rectangulum ferro fistulae habere utilitatem entis fortior in flectendo dum per cavas sectionem habet magis rigor in torquens

Since rectangular and square HSS have about two-thirds the surface area of ​​an open section of comparable capacity, this has a cost-saving benefit as there is less surface to prepare, fewer painting materials are required, cementitious fireproofing can be reduced, and minimal labour is needed