Start networking and exchanging professional insights

Register now or log in to join your professional community.

Follow

Why hollow steel pipe is stronger than solid steel rod?

user-image
Question added by sangeeta mahato
Date Posted: 2015/09/29
Faez Alchalabi
by Faez Alchalabi , Technical Civil Consultant , Self employed

the question is to be rephrased,the hollow rod is stronger than the solid rod of the same solid material , that shall make the hollow rod of bigger diameter and consequently larger moment of inertia around its central axis yielding larger resistance

tareq elgendy
by tareq elgendy , مهندس تحت التدريب , شركه فنسي الفرنسيه

because of bigger inertia than steel rods which consume same quantity of material 

Amr Moustafa Abdel-Qader
by Amr Moustafa Abdel-Qader , Cost Control / QS Engineer (FT) , Better Home Group

Because of the moment of inertia of hollow steel pipe higher than a solid steel rod.

kamal abdelal ahmed elmahdy elmahdy
by kamal abdelal ahmed elmahdy elmahdy , مهندس مدني تنفيذ , اوراسكوم

Hollow pipe have more anertia than the solid pipe

Deleted user
by Deleted user

Hollow steel pipe has higher strength to weight ratio than solid steel rod of same cross section. 

Most of the strength of a cylinder comes from the outer portions. I think the contribution goes like the cube of the radial position. So, if you took a solid rod and drilled out a half the volume from the center, you do not lose half the strength. Strength to weight ratio is better for a hollow pipe than a solid rod.

عبدالقوي الحاج
by عبدالقوي الحاج , مهندس مدني , مكتب الحاج للهندسة والمقاولات

First, the wording of the question is wrong, and the hollow is not stronger unless the diameter is greater than that because it will be a difference in the moment of inertia

Gamil Awaty
by Gamil Awaty , مهندس مدني , إعمار للهندسه

Industrial Manufacturing Company. The stiffness of the hollow pipe is more than the solid shaft with the SAME WEIGHT. Hollow pipes have a more polar moment of inertia, thus they can transmit more torque compared to solid shafts. Thus, hollow steel pipes are stronger than solid shafts having IDENTICAL WEIGHT.

Hossam Elsharkawy
by Hossam Elsharkawy , مهندس مدنى تنفيذ ومكتب فنى , الهيئة العامة للابنيه التعليميه

Because it is not rustproof

ABDULHAMEED ABDULHAMEED
by ABDULHAMEED ABDULHAMEED , Senior Project Manager , GRAND BUILDING DEMOLITION

because the moment of inartia of the member depends on the depth of the beam not the wheight while the weight will make more sttlement

AHMED MOHAMED ABD ELFATTAH
by AHMED MOHAMED ABD ELFATTAH , Civil Projects Engineer , Safwa Engineering Consultants.

The area of ​​​​the sector is larger and therefore bears higher stresses

More Questions Like This