410 45TH ST SW 2016-01-01 MF Import

, 1. The new:nterior stair plan should indicate new wall construction, where applicable, with wall sections to indicate materials. a. Please reference sheet S3 clouded notations on building cross-section. 2. The vertical separ:tion beiween the three residential units should be referenced on the d�awings to wall sections indicating tested wall assemblies to meet the requirements of one hour fire resistant partitions, per IBC sections 420.2, 7093, and the continuity requirements of IBC section 709.4. a. Please see sheet 53, building cross-section for existing 1 hr firewall notations. b. Please note that inspector to verify that one layer of'/" sheetrock is currently installed on each side of upper level units B and C. 3. The horizontal separation between Units A and B should be referenced on the drawings to floor sections indicating tested floor assemblies to meet the requirements of one hour fire resistant horizontal assemblies, per IBC sections 4203 and 712, and the continuity requirements of IBC section 712.4. a. Please see sheet S3, building cross-section for existing 1 hr firewall notations. b. Please note that inspector to verify two layers of 3/4" sheetrock is currently installed between Units A and B(ceiling of Unit A). EGRESS 1. The new interior stair treads and risers should be dimensioned on the drawings as minimum 11 inch tread, and maximum 7 inch riser, per IBC section 1009.4.2. a. Ple�se see clouded notations on sheet S3, stair detail. 2. Continuous handrails should be shown on the drawings on one side of the new interior stair, per IBC section 1009.12, exception 2. The handrail should be shown to extend from the top riser to the bottom riser, per BC section 1012.6, exception 1. a. Please see sheet S3, stair detail. 3. The interior stair handreil height should be shown on .he drawings at a height of between 34 and 38 inches, per IBC section 1012.2. a. Please see sheet 53, stair detail. 4. The profile of the in:erior stair handreil should be shown on the drawings to meet the graspability•�f Type 1 handrails, per IBC secti�n 1012.3.1. a. Please see sheet 53, stair detail, 1 %:"-2" continuous reil notation. 5. Continuous handrails sheuld be shown on the drawings on both sides of the existing exterior stair, per IBC section 1009.12. a. Please see clouded corrections on pian sheet 52. 6. The hand�ail on the exterior stairs should be shown on the drawings to extenu horizontally at least 12 inches beyond the top riser and cuntinue to slope for the depth of one tread beyond t �e bottom riser, in the same direction as the stair flight, per IBC section 1012.6. a. Please see sheet S2, existing concrete stair detail. These stairs are currenti; as-built, original to the permitted second story 2-unit structure. 7. A guard should be shown on the drawings for the main entries into Units 8 and C at the second level, per IBC section 1013. a. Please see douded corrections on plan sheet 52 showing guard rails existing to the structure. 2