September 1989 Table of Contents

Features Skid-Steer Loaders Offer Versatility and Mobility

Compact size, maneuverability, low operating and owning cost, and the ability to power a variety of attachments make skid-steer loaders one of the handiest pieces of equipment at the jobsite. Read more

Features Cable-Stayed Bridge Completed Across James River

The newly completed cable-stayed box girder bridge over the James River near Richmond, Virginia, has a 630-foot main span that is expected to set a new trend in the development of cable-stay bridges. Historically the cable-stay concept has been used for long spans of 800 feet or more--a range in which the unstayed box girder cross section is too heavy to be competitive. Now, however, bid results on the James River Bridge suggest that the cable-stay concept may have considerable merit in the 500- to 700-foot span range. Read more

Features Getting More from Your Forklift

Although rough terrain forklifts are standard equipment on many construction jobs, getting the most from them is up to the ingenuity and skill of the foreman. Knowing the equipment and its lift capacity lets you get more production from your forklift. Read more

Features Economical Cooling of Hot Weather Concrete cold water works well and often costs less than other methods

Tight specs for concrete temperature control during hot weather don't have to drive concrete production costs out of sight. With a modest investment in aggregate cooling equipment, producers can reduce mix temperature at a reasonably low operating cost. Under many conditions, aggregate cooling costs less than using ice or liquid nitrogen to get the same results. Read more

Features Changing Your Type of Work -- Even a Little -- Is Risky

Expanding into other types of construction is quite common. Most often contractors expand because their marketplaces are dwindling. But the risks of doing a new kind of work are the same as starting a new business. If the risks aren't recognized and addressed, you could destroy your existing, successful company. To make a switch, expect a learning period and plan a small first project to get experience. Read more

Features Trolley System Puts Concrete Pipeline on Wheels

Pumping is a fast, labor-saving method for placing concrete. But it still takes a lot of manpower to drag discharge line filled with heavy, wet concrete around areas not accessible with a boom. Read more

Features Planning Is the Key to Building More Efficiently

Without good planning, efficiency in construction can't be achieved. One reason for this is a constantly changing work force. Most general contractors acquire a new work force on each project. Only project managers and key superintendents move from job to job. Providing these key people with a well-thought-out plan will help them get the new supervisors, including foremen, up to speed quickly. Read more

Features Pumps Keep Arena Concrete Pours on Schedule

Even on a job with two tower cranes at work, pumping proved to be the most efficient concrete placing method for a basketball arena being built in Minneapolis. Concrete work for the 10-level structure was originally scheduled to be done with a tower crane and 3-yard bucket, with a smaller hydraulic crane helping out. But the general contractor called in the pumps when lower-level arena walls were placed, then opted to pump the decks and supporting beams too. Read more

Problem Clinic Wood for Formwork

Is it better to use air-dried or kiln-dried wood for formwork? Read more

Problem Clinic Percent Solids in Curing Compounds

What's the significance of percent solids in liquid membrane curing compounds? The cure-and-seal products seem to have a higher solids content. If two products meet the ASTM requirements for curing compounds, is the one with a higher percent solids more d Read more

Close X