Frogs and toads belong to the largest of the three groups of amphibians. There are more than 4,000 species of frogs and toads alive today.The earliest known frog-like ancestor is Gerobatrachus, a toothed amphibian that lived about 290 million years ago.rogs and toads belong to the largest of the three groups of amphibians. There are more than 4,000 species of frogs and toads alive today.
Engineering fees themselves can be broken down into a few categories, each making up a percentage of the overall fee. Preliminary design services should be approximately 30 percent of the fees, while final design services and paperwork should equal another 45 percent. Construction and contract administration should be 20 percent, and tender call services should make up the final 5 percent.
Engineering fees are mechanical and structural engineering costs not already included in an architectural design fee. These fees may be structured in a few different ways, including as a percentage of the overall construction estimate or costs.ccording to an article in the Engineering News-Record, since the U.S. Justice Department enforced antitrust rules against engineering associations in 1972, fees based on a percentage of construction costs barely rose over the next 30-plus years.