By: D. Larry Dunville
Tel: 574-210-8612
Email Mr. Dunville
You have a shiny new building with a shiny new crane and everything looks great. For some reason, though, the crane won't clear the building columns, even though the contractor and the crane manufacturer are saying everything is to spec and it's not their problem. Common sense says somebody is wrong and that somebody should have to pay (because it's going to cost a bundle).
Unfortunately in this case, there's a giant crack in t he building specs, and you've just fallen through it. This means that after all the arguing and legal costs, you're still going to have to pay to get it fixed.
If you've already fallen in this black hole, there's not much you can do, but if you are about to embark on a new building with an overhead crane, this article will show you where the cracks are and suggest how to bridge them safely.
D. Larry Dunville has over 35 years of Overhead Crane experience. Mr. Dunville has built, installed, engineered, estimated, sold and serviced overhead bridge cranes. He has sat on the industry committees that wrote the crane specs for the steel industry, written articles, and taught professional architects and engineers about the special requirements to be aware of when designing buildings that will house overhead cranes.
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8/18/2025· Construction
Construction Problems With Mandatory Start And Finish Constraints
A critical path method (CPM) schedule or programme is a dynamic planning tool that engineering and construction industry planners and schedulers commonly use to manage, coordinate, and forecast work activities based on activity durations and logic. It is paramount that a CPM schedule accurately calculate forecasted dates
5/11/2018· Construction
Construction Alert: Bidding On Public Works Projects
By: Darryl Horowitt
The courts have been busy dealing with issues relating to bidding on public works projects. Two recent decisions have been issued: Great Western Contractors, Inc. v. Irvine Unified School District (2010) 2010 DJDAR 13815 and Schram Construction Inc. v. The Regents of the University of California (Southland Industries) (2010) 2010 DJDAR 13398.
8/2/2017· Construction
The Collapsed As-Built Windows Schedule Analysis Method
The Collapsed As-Built Windows Schedule Analysis (AACE® International Recommended Practice 29R-03, Method Implementation Protocol 3.9) is a modeled, subtractive, multiple-base method. It is a retrospective CPM schedule analysis which is typically used to prove entitlement for compensable delay and assess concurrency of delay within a window of time. The analysis simulates the as-built conditions within a schedule window and then delays are removed from the CPM model. If the forecasted project finish date “collapses” but-for or absent compensable delays, then entitlement for compensable time-related costs can be demonstrated. This article addresses the usage of the Collapsed As-Built Windows protocol and the advantages and disadvantages of the methodology.
