Secondary stress. A secondary stress is any stress in the structure which is not a primary stress or peak stress. Source: API SPEC 16R, Specification for Marine Drilling Riser Couplings, Exploration and Production Department, First Edition, January 1997. Global Standards.
Two groups of ground nesting bees commonly. found in Michigan are bumble bees and. burrower (andrenid) bees. Bumble bees are. easily recognized by their large, robust, hairy, black and yellow (sometimes orange) bodies. Bumble bees live in colonies of several. hundred individuals, but only the queens.
Most carpenter bees are large and robust, usually one inch long. They have some yellow hair, but not on the abdomen like bumblebees. Bees are helpful to DeKalb County farmers and gardeners. They pollinate many different kinds of crops and home gardens, resulting in a good harvest.However, some types of bees, especially the carpenter bee, can be helpful and also cause damage to wooden structures.They resemble bumblebees, but their abdomens are blue-black, shiny and smooth while the bumblebees are yellow and black or black with fine hair.ees are helpful to DeKalb County farmers and gardeners. They pollinate many different kinds of crops and home gardens, resulting in a good harvest.