apron lining

apron lining

[′ā·prən ‚līn·iŋ]
(building construction)
The piece of boarding which covers the rough apron piece of a staircase.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

apron lining

The piece of boarding which covers the rough apron piece of a staircase.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.