drop spreader
In landscape architecture, a spreader, 1 for metering and distributing grass seed and/or fertilizer over a given area.
Glossary
Glossary
Glossary
drop hammer
A heavy weight for driving a pile into the ground; dropped by gravity along a set of guide rails onto
Glossary
drop-head window
A double-hung window whose lower sash can drop through the window sill into a pocket below the sill.
Glossary
drop-in beam
A simple beam, usually supported by cantilever arms, with joints so placed that it can be installed by lowering it