טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentKedem Dor
SubjectPrecursory Identification of Safety Hazared in
Industrialized Construction Methods in Concrete
DepartmentDepartment of Civil and Environmental Engineering
Supervisor Professor Yehiel Rosenfeld
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract

Throughout the world, the construction industry holds first place in the rate of its occupational accidents.

In the construction industry, each project is unique, with no regular set of activities,

thus it is difficult to prepare in advance of events and predict what could become a safety hazard. This problem can be overcome, in part, by the use of industrialized building methods, which are more structured and predictable.  

However, industrialized construction contains unknown risks. Currently, there is no methodology or any other engineering method which examines and guides the development and assessment of safety-aspects of new construction methods.

The prevailing approach in the construction sector today is to inspect the “final product” and its resilience to any safety hazard or incident.

The purpose of this study is to create a precursory identification tool for safety hazards that may arise during work on the site using new construction methods. The tool can be helpful during the stage of preliminary assessment of new construction methods, and, of course, prior to actual implementation of unfamiliar methods for the workers who will be using them. This tool is another milestone in the path towards safety management in construction, mostly for “preventive safety management".

This study confronts the unique weaknesses of industrialized construction with concrete by developing a system for identification of potential hazards before they occur.

In this study, four methods of industrialized construction that are applied in Israel were inspected through on-site visits to construction sites, including observations, documentation of the methods, analysis of the chronological stages, identifying risk factors and evaluation of the hazards in the method.

The tool developed enables the conduction of a Preliminary Hazard Analysis (PHA) as early as during the design phase (even before the method was applied on construction sites).

A pilot round and experimental trials were performed with two safety experts in order to get objective feedback about the model, make changes and modifications where necessary, and validate the model.

The method includes the following main tools:

-          It requires the presenter of the new construction method to systematically define stages within the process of the suggested construction method.

-          It provides guidelines and instructions for risk factor analysis (work safety) during all construction stages, as defined by the method designer.

-          It includes checklists of common risk factors that help identify and assess the hazards.