Page 176 - ICC IEBC 2018

RESOURCE A

Roofs: The preliminary field survey of the roof system is ini- Materials: The field investigator should be able to identify
tially concerned with water-tightness. However, once it is ordinary building materials. In situations where an unfamiliar
apparent that the roof is sound for ordinary use and can be material is found, a sample should be obtained. This sample
retained in the rehabilitated building, it becomes necessary to should measure at least 10 cubic inches so that an ASTM
evaluate the fire performance. The field investigator must E136 fire test can be conducted to determine if it is combusti-
measure the thickness and identify the types of materials ble.
which have been used. Be aware that there may be several
Thickness: The thickness of all materials should be measured
layers of roof materials.
accurately since, under certain circumstances, the level of fire
Doors: Doors to stairways and hallways represent some of the resistance is very sensitive to the material thickness.
most important fire elements to be considered within a build-
Condition: The method of attaching the various layers and
ing. The uses of the spaces separated largely controls the facings to one another or to the supporting structural element
level of fire performance necessary. Walls and doors enclos- should be noted under the appropriate building element. The
ing stairways or elevator shafts would normally require a “secureness” of the attachment and the general condition of
higher level of performance than between the bedroom and the layers and facings should be noted here.
bath. The various uses are differentiated in Figure 1.
Notes: The “Notes” column can be used for many purposes,
Careful measurements of the thickness of door panels but it might be a good idea to make specific references to
must be made, and the type of core material within each door other field notes or drawings.
must be determined. It should be noted whether doors have
self-closing devices; the general operation of the doors After the building survey is completed, the data collected
should be checked. The latch should engage and the door must be analyzed. A suggested work sheet for organizing this
should fit tightly in the frame. The hinges should be in good information is given below as Figure 2.
condition. If glass is used in the doors, it should be identified The required fire resistance and flame spread for each
as either plain glass or wired glass mounted in either a wood building element are normally established by the local build-
or steel frame. ing or rehabilitation code. The fire performance of the exist-
ing materials and assemblies should then be estimated, using

FIGURE 2
PRELIMINARY EVALUATION WORKSHEET
ESTIMATED
REQUIRED FIRE REQUIRED ESTIMATED FIRE ESTIMATED METHOD OF
BUILDING ELEMENT UPGRADED NOTES
RESISTANCE FLAME SPREAD RESISTANCE FLAME SPREAD UPGRADING
PROTECTION
Exterior Bearing
Walls
Interior Bearing
Walls
Exterior Nonbearing
Walls
Interior A
Nonbearing
Walls or B
Partitions:
Structural Frame:
Columns
Beams
Other
Floor/Ceiling
Structural System
Spanning
Roofs
Doors (including frame and
hardware):
a) Enclosed vertical exitway
b) Enclosed horizontal
exitway
c) Others

2018 INTERNATIONAL EXISTING BUILDING CODE ® 157
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