FABRICATION AND ERECTION OF STRUCTURALSTEELWORK

1.0 INTRODUCTION

The steel-framed building derives most of its competitive advantage from the virtues ofprefabricated components, which can be assembled speedily at site. Unlike concreting,which is usually a wet process conducted at site, steel is produced and subsequentlyfabricated within a controlled environment. This ensures high quality, manufacture offsitewith improved precision and enhanced speed of construction at site.The efficiency of fabrication and erection in structural steelwork dictates the success ofany project involving steel-intensive construction. Current practices of fabrication anderection of steel structures in India are generally antiquated and inefficient. Perhaps, thisinadequate infrastructure for fabrication is unable to support a large growth of steelconstruction. In India, the fabrication and erection of structural steelwork has been out ofthe purview of the structural designer. Nevertheless, in the future emerging situation, theentire steel chain, i.e. the producer, client, designer, fabricator and contractor should beable to interact with each other and improve their efficiency and productivity for thesuccess of the project involving structural steelwork. Hence it becomes imperative thatstructural designers also must acquaint themselves with all the aspects of the structuralsteel work including the fabrication and erection, and that is the subject matter of thepresent chapter to briefly introduce good fabrication and erection practices.

Scope:Construction of RCC work in pump and sump room

Reference:Drawings no: ssidc/pwitc/wd/sd-113and Technical Specifications

Responsibility: Site Engineer and site supervisor

Checked By:Site In-charge and QA Engineer

FABRICATION & ERECTION PROCEDURE:

1) Safety Precautions: As per EHS.

2) Un loading of the structural steel will be done with hydra or manually

3) Material stock yard will be provided for stocking of deck sheet, MS Plates, and Cylinders for cutting and welding with O2 and LPG.

4) Material making as per drawings will be done at stock yard.

5) UN loading of the structural steel will be done with hydra or manually.

6) Insert plates will be placing as per the drawing in the rcc beams before casting of concrete.

7) Fabrication of buit up section will be done by cutting of MS Plate with gas cutting and welding will be done as per the built up section drawing.

8) Primer coat for structural steel will be done at material stock yard.

9) After Completion of entire fabrication works beams and channels will be shifted to the work place with hydra and erection of the beams and channels will be done as per drawing using 40 ton crane.

10) Then After 1.25 MM deck sheet will be layed on the beams for slab casting with given specified Reinforcement steel tied on the deck sheet with given spacing and dia of steel mentioned.

11) Taking Approval From Engineer in charge as per drawing for further concrete pouring as per the mentioned grade and Thickness.