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Construction Planning and Scheduling

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Construction Planning and Scheduling
Introduction

Construction activities are often exposed to various weather conditions, and often construction productivity is dependent on these weather conditions. Weather conditions are local, seasonal, and sometimes unusual. Inclement weather conditions often result in project disruptions, delays, and disputes between the project parties.

Many trades such as earthwork, concrete, roofing, and landscaping are often affected by severe weather, meanwhile other trades such as carpet installers or sheetrock installers may not be directly affected by the weather. Owners, general contractors, and subcontractors all face many risks associated with weather conditions. In order to mediate weather risks, all of the involved construction parties adopt various strategies; purchase insurance, and contract options. Typically project owners try and allocate the risks related with weather delays by adding weather clauses in the contract provisions.

The goal of this paper is to discuss the impact of weather delays in construction projects. A construction schedule should include a developed plan to allow for adverse weather. The weather considerations should be addressed during contract negotiation. By accounting for weather integration in the contract and in the baseline schedule owners and the contractor can reduce the risk of disputes from weather impacts and avoiding the rejection of claims dealing with unforeseeable or unusually severe weather. Most contracts nowadays have integrated weather calendars in the schedule.

Adverse Weather

Adverse weather, commonly referred to as severe weather, is any weather condition, rain, snow, temperature that exceeds historical data gathered over a specific period of time to establish what could be reasonably expected over the course of the construction project. Establishing unusually severe weather can be a challenging task. The most common method is to compare the actual weather experienced on the project to a historical



Bibliography: Glavinich, Thomas. Construction Planning and Scheduling. Edited by Second Edition. The Associated General Contractors of America. Long, Nguyen. Analysis of adverse weather for excusable delays. American Society of Civil Engineers. 5 26, 2010. ascelibrary.org/coo/resource/1/jcemd4/v136/i12/p1258_s1?view=fulltext> (accessed 4 4, 2012). Morosko, Nick, interview by Andrew Barthel. Project Manager Bozeman, MT, (4 2, 2012). Sabol, Kevin. Integrated Framework for Quantifying and Predicting Weather related delays. American Society of Civil Engineers. 8 16, 2004. ascelibrary.org/coo/resources/1/jcemd4/v136 (accessed 4 6, 2012). Syzdik, Brian. Weather Considerations for Construction Project Scheduling Models. Society of American Military Engineers. 10 12, 2012. militaryengineers.wordpress.com/2010/10/12 (accessed 3 24, 2012).

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