A qhov seemtuaj yeem muaj ntau yam duab, thiab nws tsis txwv rau ib daim ntawv tshwj xeeb. Lo lus "hollow section" yog hais txog cov khoom siv nrog lub hollow sab hauv, uas txhais tau hais tias nws tsis muaj cov khoom seem. Cov duab zoo rau cov seem hollow muaj xws li:
Square Hollow Seem (SHS): Hom ntu ntu no muaj lub ntsej muag square-shaped cross-section, nrog rau sab ncaj thiab sab xis ntawm cov ces kaum.
Rectangular Hollow Section (RHS): RHS muaj ib lub duab plaub-zoo li tus ntoo khaub lig-section, nrog rau sab ncaj thiab sab xis ntawm cov ces kaum. Nws feem ntau yog siv rau kev siv cov txheej txheem qhov twg cov duab plaub yog tsim nyog.
Circular Hollow Section (CHS): Circular hollow sections muaj ib ncig hla ntu. Cov no feem ntau yog siv rau cov ntawv thov uas nyiam lub voj voog, xws li hauv kev tsim kab, ncej, lossis ncej.
Elliptical Hollow Section: Cov seem no muaj elliptical, lossis oval, hla ntu. Lawv tau siv rau hauv cov ntawv thov tshwj xeeb uas cov duab no muaj qhov zoo.
Custom Shapes: Hollow seem tuaj yeem tsim kev cai nrog ntau cov duab tsis zoo, xws li hexagonal, octagonal, lossis cov duab tsis sib xws, kom tau raws li cov kev xav tau ntawm engineering thiab architectural.
Qhov kev xaiv ntawm hollow seem zoo nyob ntawm qhov kev npaj siv, kev tsim qauv, thiab kev xav zoo nkauj hauv kev tsim kho thiab engineering tej yaam num. Cov duab sib txawv muaj qhov zoo sib txawv ntawm cov khoom muaj peev xwm, kev zoo nkauj, thiab kev ua haujlwm.
