For example, those single taxpayers with $5,000 of Social Security benefits in the example above would see their marginal tax rate on nonâSocial Security income boosted by 50 percent if their modified AGI was between $25,000 and $30,000 and by 85 percent if their modified AGI was between $34,000 and $36,000.
Three types of vault were commonly used: the barrel-vault, the groined or four-part vault, and the dome. The barrel-vault was generally semi-cylindrical in section, and was used to cover corridors and oblong halls, like the temple-cellas, or was bent around a curve, as in amphitheatre passages.
Glossary of Medieval Art and Architecture. barrel vault or tunnel vault: The simplest form of a vault, consisting of a continuous surface of semicircular or pointed sections. It resembles a barrel or tunnel which has been cut in half lengthwise Compare with:groin vault. Types of barrel vault: longitudinal.Click here for pronounciation.lossary of Medieval Art and Architecture. barrel vault or tunnel vault: The simplest form of a vault, consisting of a continuous surface of semicircular or pointed sections. It resembles a barrel or tunnel which has been cut in half lengthwise Compare with:groin vault. Types of barrel vault: longitudinal.