HomeMy WebLinkAboutA402 4 STORY STAIR SECTIONSA. INTERIOR EXIT STAIRWAYS SHALL BE ENCLOSED AND CONSTRUCTED AS
FIRE BARRIERS WITH A 2-HOUR FIRE-RESISTIVE RATING.
B. PROVIDE A WOOD-FRAMED STAIR SYSTEM.
C. PROVIDE FULL-DEPTH BATT INSULATION AT ALL INTERIOR AND EXTERIOR
STAIRWAY WALLS WITH NO VOIDS OR CAVITIES.
D. PROVIDE CONTINUOUS PAINTED METAL 1 1/2" O.D. HANDRAILS ON EACH SIDE
OF A STAIR RUN. RETURN THE ENDS OF HANDRAILS TO THE WALL.
HANDRAILS SHALL HAVE A UNIFORM HEIGHT ABOVE THE STAIR TREADS AND
LANDINGS WITH THE TOP OF THE HANDRAIL AT +35". EXTEND HANDRAILS A
MINIMUM OF 12" BEYOND THE TOP RISER AND A MINIMUM OF 12" BEYOND
THE BOTTOM RISER, UNLESS OTHERWISE NOTED. PROVIDE A CLEAR
SPACE OF 1 1/2" BETWEEN THE HANDRAIL AND THE WALL.
E. GUARDRAILS SHALL BE SET AT +42" HIGH, MEASURED VERTICALLY AS
FOLLOWS:
1. FROM THE ADJACENT WALKING SURFACES.
2. ON STAIRS - FROM THE LINE CONNECTING THE LEADING EDGES OF THE
TREAD NOSINGS.
F. GUARDRAIL OPENINGS SHALL NOT HAVE OPENINGS WHICH ALLOW PASSAGE
OF A SPHERE 4" IN DIAMETER FROM THE WALKING SURFACE TO THE
REQUIRED GUARDRAIL HEIGHT.
STAIRWAY NOTES architects and land planners6201 carrollton avenueIndianapolis, in 46220phone 317 202 0661fax 317 202 0662email office@weaversherman.comweaver sherman design07/26/22