2707 COLBY AVE BASE FILE 2018-01-02 MF Import

Interior nonbearing partitions which are required by Table No. 17-A to be of one -hour fire resistive construction are permitted to be of noncombustible construction without a fire -resistive time period. This reduction does not apply to corridors, which are required to be fire resistive in accordance with the requirements of Section 3305(g), or to partitions separating dwelling units or guest rooms. Travel distance may be increased from the most remote point in a floor to a horizontal exit or to an enclosed stairway. The increase is to 300 feet and has real application only for office buildings with open plans. As the code in Section 3303(d) already permits a 300-foot travel distance where the last 150 feet is within a corridor complying with Section 3305(g), this increase will mainly be applied to open-plan office buildings which do not have fire -resistive corridors. In this case, the code assumes that the automatic and early fire suppression provided by the sprinkler system makes it improbable that the occupants would be unable to reach an exit before the environment becomes untenable. Except in certain cases, fire dampers are not required. However, ceiling dampers which protect floor -ceiling assemblies must be maintained. The requirement in Section 1204 for emergency escape -and -rescue windows is waived. This is in reality a small trade-off, as the protection afforded by the sprinkler system is considered by the code to be preferable to jumping from a second or third story window. II. UBC Section 1803(b) requires opening protection in Type I F.R. building to be three fourths hour when they are less than 20 feet from a property line or center line of a public way. Vacation of the alley would result in one-half the right-of-way being acquired by each adjacent property. This has the same effect as requiring the protection at the center line of the public way The less restrictive requirements of open parking garages relative to the protection of openings is partially predicated on the requirement that they be "used exclusively for the parking or storage of private or pleasure -type motor vehicles". Please also note that due to the encroachment of the building to the east into the alley R.O.W. that protection of openings would be also be required by Table No. 7-13 if an open parking garage were constructed on this site. svnppea12 s/3