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.
The Three Bees. There are different types of bees in a honey bee hive: Worker, Drone and Queen. Each has its own important roles and performs specific duties in a bee colony. The queen bee can be recognized by her abdomen, which is usually smooth and elongated, extending well beyond her folded wings.