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.
Races of Bees. Most common strains of bees are gentle enough to keep in a city. In the northern U.S., the Carniolan race is most popular. In the southern U.S. and Mexico, the Italian bee is preferred. If a colony is found to be inclined to sting, it should be requeened with gentle stock.