Footnotes, March 2012, Vol.37, no.1-3

Monthly newsletter of State Library

Iowa Department of Transportation Major Items - Preliminary Quantity Report, April 17, 2012; With Addendums

Weekly letting report.

Iowa Department of Transportation Major Items - Preliminary Quantity Report, May 15, 2012; With Addendums

Weekly letting report.

Footnotes, June 2012, Vol.37, no.4-6

Monthly newsletter of State Library

Iowa Department of Transportation Major Items - Preliminary Quantity Report, September 18, 2012; With Addendums

Weekly letting report.

Footnotes, September 2012, Vol.37, no.7-9

Monthly newsletter of State Library

Iowa Crop and Weather Report, November 11, 2012, Vol. 12. no. 37

Report produced by the The Department of Agriculture and Land Stewardship, Climatology Bureau. Iowa Secretary of Agriculture Bill Northey today commented on the Iowa Crops and Weather report released by the USDA National Agricultural Statistical Service. The report is released weekly from April through October.

Footnotes, December 2012, Vol.37, no.10-12

Monthly newsletter of State Library

Analysis of Existing Work-Zone Devices with MASH Safety Performance Criteria, TPF-5(018), 2009

Crashworthy, work-zone, portable sign support systems accepted under NCHRP Report No. 350 were analyzed to predict their safety peformance according to the TL-3 MASH evaluation criteria. An analysis was conducted to determine which hardware parameters of sign support systems would likely contribute to the safety performance with MASH. The acuracy of the method was evaluated through full-scale crash testing. Four full-scale crash tests were conducted with a pickup truck. Two tall-mounted, sign support systems with aluminum sign panels failed the MASH criteria due to windshield penetration. One low-mounted system with a vinyl, roll-up sign panel failed the MASH criteria due to windshield and floorboard penetration. Another low-mounted system with an aluminum sign panel successfully met the MASH criteria. Four full-scale crash tests were conducted with a small passenger car. The low-mounted tripod system with an aluminum sign panel failed the MASH criteria due to windshield penetration. One low-mounted system with aluminum sign panel failed the MASH criteria due to excessive windshield deformation, and another similar system passed the MASH criteria. The low-mounted system with a vinyl, roll-up sign panel successfully met the MASH criteria. Hardware parameters of work-zone sign support systems that were determined to be important for failure with MASH include sign panel material, the height to the top of the mast, the presence of flags, sign-locking mechanism, base layout and system orientation. Flowcharts were provided to assist manufacturers when designing new sign support systems.

Iowa Department of Transportation Major Items - Preliminary Quantity Report, November 19, 2013; With Addendums

Weekly letting report.

University of Iowa School of Library and Information Science newsletter. 1995-1996, no. 37.

Newsletter from the University of Iowa School of Library and Information Science.

University of Iowa School of Library and Information Science newsletter. Spring 2002, no. 43.

Newsletter from the University of Iowa School of Library and Information Science.

Iowa Department of Transportation Major Items - Preliminary Quantity Report, May 20, 2014; With Addendums

Weekly letting report.

Dynamic Tests of a Three-Span Continuous I-Beam Highway Bridge, HR-43, 1959

This paper presents the results of the static and dynamic testing of a three-span continuous I-beam highway bridge. Live load stress frequency curves for selected points are shown, and the static and dynamic load distribution to the longitudinal composite beam members are given. The bridge has four traffic lanes with a roadway width of 48 ft. Six longitudinal continuous WF beams act compositely with the reinforced concrete slab to carry the live load. The beams have partial length cover plates at the piers. Previous research has indicated that beams with partial length cover plates have a very low fatigue strength. It was found in this research that the magnitude of the stresses due to actual highway loads were very much smaller than those computed from specification loading. Also, the larger stresses which were measured occurred a relatively small number of times. These data indicate that some requirements for reduced allowable stresses at the ends of cover plates are too conservative. The load distribution to the longitudinal beams was determined for static and moving loads and includes the effect of impact on the distribution. The effective composite section was found at various locations to evaluate the load distribution data. The composite action was in negative as well as positive moment regions. The load distribution data indicate that the lateral distribution of live load is consistent with the specifications, but that there is longitudinal distribution, and therefore the specifications are too conservative.

Water Summary Update, September 2, 2014, No. 43

A snapshot of water resource trends prepared by the Iowa DNR in collaboration with the Iowa Department of Agriculture and Land Stewardship, the U.S. Geological Survey, and The Iowa Homeland Security and Emergency Management Department.