scholarly journals Forensic Engineering Investigation and Analysis of a Tower Crane Collapse

2015 ◽  
Vol 32 (1) ◽  
Author(s):  
Bransford Pickett
Keyword(s):  
New York ◽  
Material Handling ◽  
Building Construction ◽  
High Rise ◽  
Tower Crane ◽  
Forensic Engineering ◽  
Multi Level ◽  
Engineering Investigation ◽  
Level Building ◽  
Tall Tower

Tower cranes are popular and one of the predominant methods of material handling in high rise building construction. When there is a collapse of a tower crane in a city like New York, it is very visible, receives intense scrutiny, and becomes potentially political. This paper examines a 250-foot-tall tower crane collapse during the jumping phase of the crane to increase its height in support of a multi-level building construction. The author’s investigation examines the “defective sling” claim as the primary cause of the crane collapse along with some key findings and opinions regarding the slings used to rig the collar tie to the tower section of the crane.

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.

scholarly journals Forensic Engineering Investigation of PVC Piping Failure in a Multistory Condominium Building

2016 ◽  
Vol 33 (1) ◽  
Author(s):  
John Certuse
Keyword(s):  
Thermal Expansion ◽  
System Design ◽  
Polyvinyl Chloride ◽  
Commercial Buildings ◽  
Building Construction ◽  
Segment Length ◽  
Piping System ◽  
Piping Systems ◽  
Forensic Engineering ◽  
Engineering Investigation

Polyvinyl chloride (PVC) piping systems in larger commercial buildings are subjected to greater stresses due to normal building movement when segment length, diameter, and schedule are increased in comparison to smaller residential installations. The likelihood for increased stresses in these system installations must be recognized and accommodated for in the initial piping system design. Performance aspects, such as thermal expansion and building settling, must be considered as well as piping configurations and hanger support placement. This paper addresses the investigation methodology used to identify the causes of chronic building construction defects that resulted in water and mold damage to a recently renovated multistory condominium building.

Virtual reality (VR) supported lift planning for modular integrated construction (MiC) of high-rise buildings

2019 ◽  
Vol 26 (3) ◽  
pp. 136-143 ◽  
Author(s):  
Zhiqian ZHANG ◽  
Wei PAN
Keyword(s):  
Virtual Reality ◽  
Real Life ◽  
Building Construction ◽  
Construction Simulation ◽  
Construction Process ◽  
Simulation Tools ◽  
High Rise ◽  
Tower Crane ◽  
Site Layout ◽  
Building Project

Modular integrated construction of high-rise buildings has shown its potential in accelerating the speed of construction, improving safety, safeguarding quality and enhancing productivity. However, due to the disruptive change to the construction process, challenges are identified to effectively plan and handle multiple lifts for hoisting heavy modules. Research on lift planning includes the development of simulation tools. However, the previous tools provided either static simulations or pre-designed animations that did not address the interactions between planners and the tools. Virtual reality (VR) offers an opportunity to build an interactive and navigable 3D environment. This paper aims to develop a userfriendly VR-supported tool for achieving effective lift planning for constructing high-rise modular buildings. First, the module lifting process and tower crane operations were analysed. Second, a VR demonstration was developed using a real-life modular building project. Third, the demonstration was used during interviews with the project team to verify the effectiveness of the developed tool. Results suggest that the tool can help optimise the site layout and lift logistics through the provided functions of collision detection and construction simulation. The findings suggest that VR-supported lift planning will contribute to ensure site safety and enhance the productivity of modular high-rise building construction.

scholarly journals Forensic Engineering Investigation Of A Pedestrian Bridge Collapse

2005 ◽  
Vol 22 (2) ◽  
Author(s):  
Philip J. Alterman
Keyword(s):  
New York ◽  
News Item ◽  
The Internet ◽  
Pedestrian Bridge ◽  
Bridge Collapse ◽  
Forensic Engineering ◽  
Under Construction ◽  
Engineering Investigation ◽  
Accident Scene ◽  
Made In

A News Item From The Internet Listed The Accident As Marcy New York, October 10, 2002 A Highway Pedestrian Bridge Under Construction Collapsed Thursday, Killing One Worker And Injuring Nine Others, Police Said. (From Associated Press) Newspaper Articles In The Daily Sentinel, Rome, Ny, Utica Observer Dispatch. Photographs Taken At The Accident Scene Were Obtained. See Figure 1. This Project Was Titled 5.5 Km Of Asphalt Construction Of Route #49, Replacement Of Route 291 Bridge Over Route #49 And Pedestrian Bridge Over Route #39. This Is Also Called The Utica/Rome Expressway. The Site Of The Pedestrian Bridge Is Marcy, New York. The Contract Was Awarded By Nysdot On December 18, 2001 For Completion By December 31, 2002. See Figure 2. The Authors Firm Was Contacted By Counsel For The Deceased After Searching The Internet For Consultants That Have Investigated Bridge Collapses. We Were Retained On October 28, 2002 And Inspection By This Author Was Made In

scholarly journals Forensic Engineering Investigation Of Lumber Temporary Guardrails

2010 ◽  
Vol 27 (1) ◽  
Author(s):  
John P. Leffler ◽  
Robinson H.
Keyword(s):  
Full Scale ◽  
Building Construction ◽  
Frame Building ◽  
Forensic Case ◽  
Forensic Engineering ◽  
Wood Frame ◽  
Engineering Investigation ◽  
Full Scale Testing

During Intermediate Stages Of Building Construction, Temporary Guardrails Are Required For Unfinished Openings On Balconies, Decks, Elevated Walkways, Pits, And Excavations. Osha Requires That These Temporary Guardrails Be Able To Withstand 200 Pounds Of Load, But Does Not Specify Guardrail Mounting Methods. A Forensic Case Involved Failure Of A 2x4 Lumber Guardrail Nailed To A Wood-Frame Building, Where It Was Alleged That The Mounting Method Was Inadequate. Full-Scale Testing Was Conducted To Analyze The Adequacy Of This Fastening Method And Its Reliability When Subjected To The Repeated Removal And Replacement That Commonly Occurs On Worksites.

scholarly journals Automatic Reconstruction of Multi-Level Indoor Spaces from Point Cloud and Trajectory

Sensors ◽  
2021 ◽  
Vol 21 (10) ◽  
pp. 3493
Author(s):  
Gahyeon Lim ◽  
Nakju Doh
Keyword(s):  
Point Cloud ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Reconstruction Method ◽  
Complex Environments ◽  
Indoor Space ◽  
Multi Level ◽  
Level Building ◽  
Indoor Spaces ◽  
Data Term

Remarkable progress in the development of modeling methods for indoor spaces has been made in recent years with a focus on the reconstruction of complex environments, such as multi-room and multi-level buildings. Existing methods represent indoor structure models as a combination of several sub-spaces, which are constructed by room segmentation or horizontal slicing approach that divide the multi-room or multi-level building environments into several segments. In this study, we propose an automatic reconstruction method of multi-level indoor spaces with unique models, including inter-room and inter-floor connections from point cloud and trajectory. We construct structural points from registered point cloud and extract piece-wise planar segments from the structural points. Then, a three-dimensional space decomposition is conducted and water-tight meshes are generated with energy minimization using graph cut algorithm. The data term of the energy function is expressed as a difference in visibility between each decomposed space and trajectory. The proposed method allows modeling of indoor spaces in complex environments, such as multi-room, room-less, and multi-level buildings. The performance of the proposed approach is evaluated for seven indoor space datasets.

scholarly journals Tower Crane Location Optimization for Heavy Unit Lifting in High-Rise Modular Construction

Buildings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 121
Author(s):  
Hosang Hyun ◽  
Moonseo Park ◽  
Dowan Lee ◽  
Jeonghoon Lee
Keyword(s):  
Low Cost ◽  
Modular Construction ◽  
Algorithm Optimization ◽  
Location Selection ◽  
Project Completion ◽  
High Rise ◽  
Tower Crane ◽  
Proposed Model ◽  
Study Results ◽  
Crane Selection

Modular construction, which involves unit production in factories and on-site work, has benefits such as low cost, high quality, and short duration, resulting from the controlled factory environment utilized. An efficient tower crane lifting plan ensures successful high-rise modular project completion. For improved efficiency, the lifting plan should minimize the reaching distance of the tower crane, because this distance directly affects the tower crane capacity, which is directly related to crane operation cost. In situations where units are lifted from trailers, the trailer-to-tower crane distance can have a significant impact on the tower crane operation efficiency. However, optimization of this distance to improve efficiency has not been sufficiently considered. This research proposes a genetic algorithm optimization model that suggests optimized tower crane and trailer locations. The case study results show that through the proposed model, the project manager can reflect the optimal location selection and optimal tower crane selection options with minimal cost.

Assessment of risks in high rise building construction in Jakarta

2003 ◽  
Vol 10 (1) ◽  
pp. 43-55 ◽  
Author(s):  
Djoen San Santoso ◽  
Stephen O. Ogunlana ◽  
Takayuki Minato
Keyword(s):  
Building Construction ◽  
High Rise ◽  
High Rise Building
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