UNIQUE DETERMINANTS OF CRANE SELECTION FOR MULTICRANE BUILDING CONSTRUCTION SITES

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Albert Ben-David ◽  
Aviad Shapira
Keyword(s):  
Building Construction ◽  
Construction Site ◽  
Construction Sites ◽  
Building Projects ◽  
Entire Area ◽  
Building Footprint ◽  
Mobile Crane ◽  
Selection For ◽  
Crane Selection ◽  
Share Information

Mega building projects typically employ numerous tower cranes covering the entire area of the building footprint and staging areas with multiple overlapping work envelopes. This paper aims to answer the following question: Are the determinants of crane selection for mega building projects similar to projects serviced by a small number of cranes? On-site interviews found: (1) the visibility of the crane forest in the surroundings of the project affects the approach to crane selection; (2) various modes of action are taken by project management to share information with the neighboring residents and business and to ease the hardships of living and working near a busy construction site; and (3) cranes are often selected and located such that they could dismantle other cranes, due to difficulties of using a dismantling mobile crane in the depth of the crane array.

scholarly journals Safety Assessment and Risk Management in Indian Building Construction Sites

2019 ◽  
Vol 8 (4S2) ◽  
pp. 8-12
Keyword(s):  
Safety Assessment ◽  
Building Construction ◽  
Construction Site ◽  
Construction Sites ◽  
Safety Measures ◽  
Severity Rating ◽  
Key Factor ◽  
Incident Rate ◽  
Observation Method ◽  
Unsafe Condition

Construction sites records high accident and incident rate due to lack of safety measures. Safety assessment rating is significant for every construction site to know safety status of the particular site. In this research TR safety observation method is used to assess the site performance. As unsafe condition is the key factor in every construction site, this research considers the possible unsafe conditions to assess the site performance. A questionnaire survey is done with the workers to know the existing safe conditions. Results showed that the safety performance of the site is 39%. Then every unsafe condition is ranked with respect to severity rating for detailed analysis. Furthermore bowtie analysis is used to identify the causes and consequences of the unsafe conditions. Through this analysis the owner can reduce the risk of every event and improve the site performance.

scholarly journals Rebar Worker Analysis Using a 3-Axis Accelerometer

2021 ◽  
Vol 7 ◽  
Author(s):  
Takuma Akaki ◽  
Tomoyuki Gondo
Keyword(s):  
Body Movement ◽  
Building Construction ◽  
Accelerometer Data ◽  
Construction Site ◽  
Work Intensity ◽  
Construction Sites ◽  
Repetitive Tasks ◽  
The Difference ◽  
Total Body ◽  
Large Building

The purpose of the present study is to grasp the situation of construction sites easily by distinguishing the movements of construction workers at construction sites from the accelerometer data attached to their waists. For the construction manager to accurately perceive the active or inactive state of his workers, their movements were classified into three distinct categories: walking, standing, and sitting. We tracked and observed two rebar workers for 5 days at a large building construction site. Their movements were classified by two-axis plots of (1) the difference between the maximum and minimum absolute values and (2) the value of acceleration at each second, and visualized by a heatmap among others for this trial. The results showed that despite the difficulty in distinguishing rebar work without a total body movement while sitting, the accuracy of discrimination was 60–80% in walking and sitting. From this analysis, we were able to identify repetitive tasks and the differences between morning and afternoon tasks. Furthermore, by applying simple visualization, we could concisely represent changes in work intensity over a relatively long period.

scholarly journals An Upgraded Sine Cosine Algorithm for Tower Crane Selection and Layout Problem

2020 ◽  
Author(s):  
Ali Kaveh ◽  
Yasin Vazirinia
Keyword(s):  
Material Handling ◽  
Harmony Search ◽  
Building Construction ◽  
Construction Sites ◽  
Layout Problem ◽  
Tower Crane ◽  
Np Hard Problem ◽  
Sine Cosine Algorithm ◽  
Crane Selection ◽  
Construction Site Layout

Tower crane is the core construction facility in the high-rise building construction sites. Proper selection and location of construction tower cranes not only can affect the expenses but also it can have impact on the material handling process of building construction. Tower crane selection and layout problem (TCSLP) is a type of construction site layout problem, which is considered as an NP-hard problem. In consequence, researchers have extensively used metaheuristics for their solution. The Sine Cosine Algorithm (SCA) is a newly developed metaheuristic which performs well for TCSLP, however, efficient use of this algorithm requires additional considerations. For this purpose, the present paper studies an upgraded sine cosine algorithm (USCA) that employs a harmony search based operator to improve the exploration and deal with variable constraints simultaneously and uses an archive to save the best solutions. Subsequently, the upgraded sine cosine algorithm is employed to optimize the locations to find the best tower crane layout. Several benchmark functions are studied to evaluate the performance of the USCA. A comparative study indicates that the USCA performs quite well in comparison to other recently developed metaheuristic algorithms.

Tools for mobile crane selecting and locating

2011 ◽  
Vol 2 (1) ◽  
pp. 69-74 ◽  
Author(s):  
Z. Struková ◽  
M. Ištvánik
Keyword(s):  
Software Tool ◽  
Computer Applications ◽  
Technical Documentation ◽  
Construction Sites ◽  
Preparation Phase ◽  
Object Edge ◽  
Mobile Crane ◽  
Site Planning ◽  
Crane Selection ◽  
Definition Of

Abstract Definition of types, amount and positions of cranes in construction site planning has a big impact on the overall productivity and cost effectiveness of a construction project. It is not rare, that engineers during preparation phase of construction fault in crane selection. It implies big financial losses for the company because of wrong crane rent. In visualisation of mobile crane operation in 3D is noticeable that working radius of the crane is considerably less then number listed in crane technical documentation (capacity chart). The built construction itself can reduce the crane radius when the crane boom snags the built object edge. Several computer applications were developed in order to help practitioners in selecting and using of cranes. In the paper is presented one version of non-commercial software tool (Mobile Crane Simulator) useful in construction preparation as a tool for selecting and locating of the mobile crane at construction sites. The tool was developed by authours of the paper. The principles of the tool creation are also explained.

An algorithm for mobile crane selection and location on construction sites

2001 ◽  
Vol 1 (2) ◽  
pp. 91-105 ◽  
Author(s):  
M. Al-Hussein ◽  
S. Alkass ◽  
O. Moselhi
Keyword(s):  
Construction Sites ◽  
Mobile Crane ◽  
Crane Selection

An algorithm for mobile crane selection and location on construction sites

2001 ◽  
Vol 1 (2) ◽  
pp. 91-105 ◽  
Author(s):  
Mohamed Al‐Hussein ◽  
Sabah Alkass ◽  
Osama Moselhi
Keyword(s):  
Construction Sites ◽  
Mobile Crane ◽  
Crane Selection

scholarly journals Development of Rigging System for Prefabricated Wood I-joist Floor Panels

2019 ◽  
pp. 437-445
Author(s):  
Sigong Zhang ◽  
Ying Hei Chui ◽  
David Joo ◽  
Jean-Philippe Letarte ◽  
Luca Dalcastagne
Keyword(s):  
Material Handling ◽  
Load Capacity ◽  
Building Construction ◽  
Critical Element ◽  
Construction Sites ◽  
Four Corners ◽  
Mobile Crane ◽  
Mass Timber ◽  
Lifting Equipment ◽  
Construction Practice

Panelized building construction are highly mechanized. Material handling and lifting equipment dominate construction sites and constitute the critical element in achieving productivity. In recent construction practice, panelized wood I-joist floor panels are normally lifted into place by mobile crane using flexible slings inserted through the predrilled holes on the I-joist web and sheathing panels above the I-joist top flange and then wrapped around the I-joists at the four corners. However, the pre-drilled holes on the web and sheathing may weaken the floor panels. Moreover, a range of techniques for lifting and handling mass timber panels have been developed. A typical rigging technique consists of a lifting ring and a steel plate with pre-drilled holes. By using several self-tapping screws, the panel was connected with the rigging device for lifting. However, since prefabricated I-joist floor panels are much lighter than mass timber panels and the I-joist flange is relatively narrow and thin, the rigging device for mass timber panels cannot be applied directly to I-joist floor panels, but a modified design can be developed for prefabricated I-joist floor panels. In the present study, a new rigging device was designed for prefabricated wood I-joist panels and their load capacity was evaluated by withdrawal tests. Several factors influencing the withdrawal capacity were investigated including screw types and quantities, flange width and materials, and OSB thickness.

Developing a Fire Risk Assessment Framework for Building Construction Sites

2020 ◽  
Vol 1 (1) ◽  
pp. 43
Author(s):  
John F. Y. Yeung ◽  
Daniel W.M. Chan
Keyword(s):  
Risk Assessment ◽  
Risk Factor ◽  
Hong Kong ◽  
Fire Safety ◽  
Fire Risk ◽  
Building Construction ◽  
Construction Site ◽  
Assessment Framework ◽  
Construction Sites ◽  
Fire Risk Assessment

Amongst all types of construction accidents, industrial practitioners tend to pay less attention to the prevention of fires at construction sites.  Although fires may not occur frequently on construction sites, statistics show that when they do, the consequences are very serious; involving fatalities, injuries, serious project delays and financial loss.  There are many reasons why fires occur on sites, but a simple lack of awareness of the risks of fire is a major contributor.  Fire risk assessment is not commonly performed on sites.  Hence, it is believed that an appropriate assessment method for evaluating potential fire risk is required in order to improve the awareness of fire risk on construction sites.  This paper reports on the key findings of a research project which aims to develop a comprehensive, objective, reliable, and practical fire risk assessment framework for building construction sites based in Hong Kong.  A comprehensive list of those factors (or conditions) which may constitute a fire risk was compiled using desktop research and structured face-to-face interviews with experienced site personnel.  This list of factors was then used to develop a questionnaire survey form and the Reliability Interval Method (RIM) was used to analyse the survey results and determine the relative importance and rankings of the various fire risk factors at a broad level and risk sub-factors at a detailed level.  It was found that the fire risk factor of “Fire Services Equipment and Installations” has the greatest impact on construction site fire safety, with “Means of Escape in Case of Fire” being the second, and “Attitude of Main Contractor towards Fire Safety” being the third.  In fact, it is the main contractor who plays the pivotal role in maintaining construction site fire safety, which is in line with the high ranking given to the fire risk factor of “Attitude of Main Contractor towards Fire Safety”.  The proposed fire risk assessment framework can be used to develop a useful checklist for assessing the overall level of fire risk for a construction site, and to identify any areas needing improvement.  Although the fire risk assessment framework was developed locally in Hong Kong, the research methodology could be replicated in other countries to produce similar frameworks for international comparison.  Such an extension would aid the understanding of the management of fire risk on construction sites and help discover differences between countries.

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