ACI Code Requirements for Determining Fire Resistance of Concrete and Masonry Construction Assemblies. for Determining. Fire Resistance of. Concrete and Masonry. Construction Assemblies. Reported by ACI/TMS Committee A. CI/TMS M An ACI /TMS. Find the most up-to-date version of ACI at Engineering
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Fire testing of a concrete masonry protected steel column assembly evaluates the structural integrity of the steel column under fire test conditions by measuring the temperature rise of the steel. Fire Resistance Non-combustible Norlite masonry construction mitigates the spread of fires and the dangers of structural collapse. The document 21.1 code sections related to masonry and fire-resistance.
The fire resistance rating of concrete masonry lintels is determined based upon the nominal thickness of the lintel and the minimum cover of longitudinal reinforcement in accordance with Ac 5.
SmartWall Fire Resistance see Note 2.
For the most part, the contents of the Standard are not new, but rather are a compilation and refinement of the 2161. documents previously published by the various segments of the masonry and concrete industry. Equivalent thicknesses are defined in CBC Section The list of approved materials includes: Also publishers of directories that list classified assemblies.
For finishes on the fire exposed side of the wall, a time is assigned to the finish in Table 8 which is added to the fire resistance rating determined for the base wall and non-fire side finish.
Fire testing of concrete masonry columns evaluates the ability of the column to carry design loads under standard fire test conditions. For partially grouted walls where the unfilled cells are left empty, the equivalent thickness for fire resistance rating purposes is equal to that of an ungrouted unit.
It should be noted that when finishes are used to achieve the required fire resistance rating, the masonry alone must provide at least one-half of the total required rating.
Fire testing of concrete masonry beams and lintels evaluates the ability of the member to sustain design loads under standard fire test conditions. Aic Norlite masonry construction mitigates the spread of fires and the dangers of structural collapse.
Fire Resistive Ratings
This is to assure structural integrity during a fire. These hourly fire resistance ratings can be established by three different methods: Finishes that are assumed to contribute to the total fire resistance rating of a wall must meet certain minimum installation requirements.
The fire-resistance ratings of the various thicknesses of concrete masonry walls are based on CBC Table The fire resistance rating 2216.1 based on the equivalent thickness of the concrete masonry unit and the type of aggregate s used in its production. It is a multi-functional system in a single package: Concrete masonry units manufactured with Norlite aggregates are readily available throughout the Northeast.
If the mixes were made with a lightweight aggregate of different density from another source, the aggregate proportions and the resulting fire resistance ratings will vary from those shown in Table 1. Gypsum wallboard and gypsum lath may be attached to wood or metal furring strips spaced a maximum of 24 in. The ratings are shown here in xci detail to illustrate the difference in performance between different density units. The calculation method is utilized in the Standard which determines fire resistance ratings based on the equivalent thickness of concrete masonry units and aggregate types used in their 26.1.
The following proportions were used 2166.1 blending Buildex and sand: Consult your representative for more information. The fire resistance rating of multi-wythe walls Figure 2 is based on the fire resistance of each wythe and the air space between each wythe in accordance with the following Equation.
Typical equivalent thickness values for these units are listed in Table 2. Certain finishes deteriorate more rapidly when exposed to fire than when on the non-fire side of the wall.
It is a multi-functional system 2166.1 a single package:. Careers Industry Affiliations Request Info. Table 3 lists the typical equivalent thickness for two-core concrete masonry units.
ACI 216.1-14 Code Requirements for Determining Fire Resistance of Concrete and Masonry
This TEK covers methods for determining the fire resistance rating of concrete masonry assemblies, including walls, columns, lintels, beams, and concrete masonry fire protection for steel columns. Table 4 contains sample calculations for the 93 pcf unit; calculations for the pcf units use the same methods. Drywall and furring may be attached in one of two ways:.
Plaster and stucco need only be applied in accordance with the provisions of the building code. Note that there may be situations where the wall needs to rated with the fire on only one side.
The calculation method is the most practical and most commonly used method of determining the fire resistance rating of concrete masonry. It is incorporated by reference into the major model codes of the US and allows the designer virtually unlimited flexibility to incorporate the excellent fire resistive properties of concrete masonry into sci design.
SmartWall has a clear advantage in fire endurance, exceeding code minimums with an extra margin of safety.
Fire Resistance :: Masonry :: Norlite Lightweight Aggregate
Cover requirements may be provided by masonry units, grout, or mortar. Noncombustible, stable in response to fire Structurally sound, exceptional seismic performance No toxic gases released when heated Durable, long-lasting, with low life-cycle costs.
Click here for detailed fire resistence information. The calculated fire resistance method is based on extensive research and results of previous testing of concrete masonry walls.
The listing service approach allows the designer to select a fire rated assembly which has been previously classified and listed in a published directory of listed fire rated assemblies. Expanded Acci, Clay axi Slate 3. For example, an 8 inch hollow unit with cores filled would be considered as having a 7. The third option, testing of representative elements of the construction in accordance with standard fire test methods is generally not practical due to the expense of the test and time required to build, cure, and test representative specimens.