Page 452 - 2018_Complete_14_Collection (1)_Neat

SPECIAL INSPECTIONS AND TESTS

4. Bond strength adhesion/cohesion. [BF] 1705.14.4.6 Beams and girders. At beams and
5. Condition of finished application. girders thickness measurements shall be made at nine
locations around the beam or girder at each end of a 12-
[BF] 1705.14.2 Structural member surface conditions. inch (305 mm) length.
The surfaces shall be prepared in accordance with the
approved fire-resistance design and the written instruc- [BF] 1705.14.4.7 Joists and trusses. At joists and
tions of approved manufacturers. The prepared surface of trusses, thickness measurements shall be made at seven
structural members to be sprayed shall be inspected by the locations around the joist or truss at each end of a 12-
special inspector before the application of the sprayed fire- inch (305 mm) length.
resistant material. [BF] 1705.14.4.8 Wide-flanged columns. At wide-
[BF] 1705.14.3 Application. The substrate shall have a flanged columns, thickness measurements shall be
minimum ambient temperature before and after applica- made at 12 locations around the column at each end of
tion as specified in the written instructions of approved a 12-inch (305 mm) length.
manufacturers. The area for application shall be ventilated
during and after application as required by the written [BF] 1705.14.4.9 Hollow structural section and pipe
columns. At hollow structural section and pipe col-
instructions of approved manufacturers. umns, thickness measurements shall be made at not
[BF] 1705.14.4 Thickness. Not more than 10 percent of fewer than four locations around the column at each
the thickness measurements of the sprayed fire-resistant end of a 12-inch (305 mm) length.
materials applied to floor, roof and wall assemblies and [BF] 1705.14.5 Density. The density of the sprayed fire-
structural members shall be less than the thickness resistant material shall be not less than the density speci-
required by the approved fire-resistance design, and none fied in the approved fire-resistance design. Density of the
shall be less than the minimum allowable thickness sprayed fire-resistant material shall be determined in
required by Section 1705.14.4.1.
accordance with ASTM E605. The test samples for deter-
[BF] 1705.14.4.1 Minimum allowable thickness. For mining the density of the sprayed fire-resistant materials
design thicknesses 1 inch (25 mm) or greater, the mini- shall be selected as follows:
mum allowable individual thickness shall be the design
1
thickness minus / inch (6.4 mm). For design thick- 1. From each floor, roof and wall assembly at the rate
4
nesses less than 1 inch (25 mm), the minimum allow- of not less than one sample for every 2,500 square
2
able individual thickness shall be the design thickness feet (232 m ) or portion thereof of the sprayed area
minus 25 percent. Thickness shall be determined in in each story.
accordance with ASTM E605. Samples of the sprayed 2. From beams, girders, trusses and columns at the rate
fire-resistant materials shall be selected in accordance of not less than one sample for each type of struc-
2
with Sections 1705.14.4.2 and 1705.14.4.3. tural member for each 2,500 square feet (232 m ) of
floor area or portion thereof in each story.
[BF] 1705.14.4.2 Floor, roof and wall assemblies.
The thickness of the sprayed fire-resistant material [BF] 1705.14.6 Bond strength. The cohesive/adhesive
applied to floor, roof and wall assemblies shall be bond strength of the cured sprayed fire-resistant material
determined in accordance with ASTM E605, making applied to floor, roof and wall assemblies and structural
not less than four measurements for each 1,000 square members shall be not less than 150 pounds per square foot
2
2
feet (93 m ) of the sprayed area, or portion thereof, in (psf) (7.18 kN/m ). The cohesive/adhesive bond strength
each story. shall be determined in accordance with the field test speci-
[BF] 1705.14.4.3 Cellular decks. Thickness measure- fied in ASTM E736 by testing in-place samples of the
ments shall be selected from a square area, 12 inches by sprayed fire-resistant material selected in accordance with
12 inches (305 mm by 305 mm) in size. Not fewer than Sections 1705.14.6.1 through 1705.14.6.3.
four measurements shall be made, located symmetri- [BF] 1705.14.6.1 Floor, roof and wall assemblies.
cally within the square area. The test samples for determining the cohesive/adhesive
[BF] 1705.14.4.4 Fluted decks. Thickness measure- bond strength of the sprayed fire-resistant materials
ments shall be selected from a square area, 12 inches by shall be selected from each floor, roof and wall assem-
12 inches (305 mm by 305 mm) in size. Not fewer than bly at the rate of not less than one sample for every
2
four measurements shall be made, located symmetri- 2,500 square feet (232 m ) of the sprayed area, or por-
cally within the square area, including one each of the tion thereof, in each story.
following: valley, crest and sides. The average of the [BF] 1705.14.6.2 Structural members. The test sam-
measurements shall be reported. ples for determining the cohesive/adhesive bond
[BF] 1705.14.4.5 Structural members. The thickness strength of the sprayed fire-resistant materials shall be
of the sprayed fire-resistant material applied to struc- selected from beams, girders, trusses, columns and
tural members shall be determined in accordance with other structural members at the rate of not less than one
ASTM E605. Thickness testing shall be performed on sample for each type of structural member for each
2
not less than 25 percent of the structural members on 2,500 square feet (232 m ) of floor area or portion
each floor. thereof in each story.

2018 INTERNATIONAL BUILDING CODE ® 425
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