January 1995 Table of Contents

Features Top OSHA Violations and How to Avoid Them

Nobody wants to see an employee or co-worker get hurt on the job. To an employer, accidents are expensive. Lost work time and revenue can take a chunk out of the bottom line. For example, 14% of all lost-time accidents were due to falls from elevations. But a greater concern is that some accidents can be fatal. The most frequently cited standard, which requires the use of head protection, was cited in 142 fatality inspections by OSHA over a 5-year period. Read more

Features How Concrete Contractors Deal with Government Regulations

What government rules affect contractors the most? Without a doubt safety regulations have the most influence on a contractor's daily operation. Most contractors believe that stricter safety regulations are good for the industry, and ultimately affect the bottom line. But safety requirements can sometimes go too far according to some contractors. Paperwork and bookkeeping on safety issues are a constant struggle. However, with the high fines being levied by safety inspectors for improper paperwork, it's a job that must be done. Read more

Features Raising Prices Without Fear

Most concrete contractors realize they eventually need to raise their prices if they're going to make a profit and survive in today's competitive marketplace. The question is whether you can raise prices without doing more harm to your business than good. Read more

Features Staying Competitive in a Changing Market

Concrete contractors who adopt new ideas and technologies often profit at the expense of the competitors who don't. To survive in a changing market, concrete contractors - even those who are currently successful - have to be willing to adapt and grow. Companies stay in business by responding to customer needs even when those needs change. If you lose touch with your customers, you will soon have a company providing services no one wants. Read more

Features Casting Box Girder Segments

Producing bridge segments in a casting yard away from the bridge construction site is a major advantage of segmental concrete bridges. The casting yard brings factory-controlled production techniques, efficiency, quality control, and time savings to bridge construction. Read more

Features Sawcutting Joints in Concrete

Sawcut joints minimize random cracking due to drying shrinkage and temperature changes. The weakened sections created by the joint cause the cracks to form at these locations. Cracking occurs beneath the sawed slot when the shrinkage stress exceeds the tensile strength of the concrete. Read more

Features Improving Flood Control Along the Orleans Avenue Canal

To overcome the area's exceptionally wet climate, New Orleans engineers have constructed a maze of culverts, canals, levees, and floodwalls to channel stormwater and drain it into a nearby lake. Unfortunately, many of the existing levees and floodwalls are too old and too short to provide New Orleans with the protection it now deems necessary. Read more

Features "40-Day Wonder" Sets Precedence for Airport Pavements

In 1969, the City of Atlanta - Department of Aviation had before it a great dilemma. The main runway at the time needed major rehabilitation work. Time constraints required that if the runway was to be closed during construction, the project had to be completed within 40 days. Read more

Problem Clinic Diamond Blade Cuts Too Slowly

I am using a flat saw equipped with a diamond blade to cut joints in a reinforced-concrete slab. The blade is cutting very slowly, but is showing little wear. I am using plenty of cooling water. What can I do to increase cutting speed? Read more

Problem Clinic Expansion Joints Not Needed in Sidewalk

I have been contracted to build 2,000 linear feet of 5-foot-wide, 4-inch-thick sidewalk on a 4-inch gravel base. The specifications call for expansion joints every 20 feet. I contend that expansion joints are needed at a minimum of every 50 feet and where Read more

Problem Clinic Where to Remove Cores When Investigating Low Cylinder Strengths

We placed a concrete retaining wall that was 1 foot thick, 12 feet high, and over 300 feet long. The testing lab made one set of cylinders during the placement. Breaking of the 28-day cylinders showed low concrete strengths. The engineer would like to tak Read more

Problem Clinic Floor-Flatness Number Conversion

What does a specification for a floor flatness of 1/8 inch in 10 feet equal in F-numbers? Read more

Close X