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.
Digger bees are sometimes classified in the family Anthophoridae along with the carpenter bees. These hairy bees range from 5 to 25 mm in length and, like other members of this family, the females use scopae (stiff hairs) to carry pollen. Most species nest in the ground or in vertical banks, often in sandy soil. Some species waterproof their brood cells with secreted waxy or oily material.
Today we will learn about 5 most common types of bees. Five Different Types of Bees: 1. Honey Bee: Size : Â½ to Â¾ inches. Lifespan: 4 months in winter and 6 weeks in summer. Honey bee hive has 10,000 to 50,000 bees and 20 to 80 pounds of honey.