Manhole covers finished of cast iron same as ductile iron, Civil Engineering

Assignment Help:

Question
Why are manhole covers finished of cast iron as same are through of ductile iron?

Answer
Usually, manholes covers are made of cast iron. Though, in viewpoint of pipe preservation, frequent opening of manhole covers have to be approved out. Consequently, it poses potential safety hazard to workers through lifting-up procedure of manhole covers since cast iron manhole covers are incredibly heavy to regular workers. As a result, research has been conducted and ductile iron is measured as a better choice than cast iron as it be able to oppose same traffic loads with lesser self-weight. Furthermore, as ductile iron is less brittle than cast iron, usual cast iron manhole covers are additional susceptible to harm and thus need higher preservation cost.

Though, ductile iron manhole covers do endure from some demerits. For case, owing to their relative small self-weight, vehicles transient over these manhole covers would lead to movement of covers and generate unpleasant noises. To solve this problem, in its place of increasing self-weight of elastic iron manhole covers which similarly causes safety trouble to workers throughout regular upholding, covers can be designed to be attached to the manhole frames which hold them in firm position.


Related Discussions:- Manhole covers finished of cast iron same as ductile iron

Explain the design of graded filter, Q. Explain the design of graded filter...

Q. Explain the design of graded filter? Use of graded filter has been traditionally used below the revetment and protection works. The material used in the granular / graded fi

Finite element analysis (bridge), I am a final year civil and structural st...

I am a final year civil and structural student and i need your help about my final year project. My Final Year Topic: Finite Element Analysis of a bridge using Sap2000 Aim: Fi

Fluid mechanics , i have three civil engineering fluid mechanics. 1 manomet...

i have three civil engineering fluid mechanics. 1 manometer problem 2 estimate the discharge for a channel 3 pipe system - direction of flow in line and what the value of flow in l

Roads construction in marshy land, precaution to be taken for roads constru...

precaution to be taken for roads construction in marshy land

Design of the aeration basin based on solids retention time, Design of the ...

Design of the Aeration Basin Based on Solids Retention Time - sewer construction: You are provided the following information about a municipal wastewater treatment plant. That

Embankment construction, Embankment Construction: Selection of Soil...

Embankment Construction: Selection of Soil Soil is the material used for embankment construction, though other materials like rock and fly-ash are also used in specia

Determine the common ways to present the project schedule, Common ways to p...

Common ways to present the project schedule include all except: a. Gantt charts b. Milestone charts c. PERT charts D. Project Network Diagrams with dates added   So

State highways, State Highways: These are trunk or arterial roads of a...

State Highways: These are trunk or arterial roads of a state connecting the National Highways of adjacent states and linking the district headquarters and important cities wit

Soils, how to classify soils materials

how to classify soils materials

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd