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Aci 117-06 slabs aci 117-06 on unshored metal decking, deflection occurs while the slab is being placed, and may make it diF F icult to achieve flatness values above F F aci 117-06 without the use of specialized equipment and elevation monitoring during slab placement. But the conclusion that F F is not affected significantly by dead aci deflections has been applied to all building types. For aci 117-06 listing of and access to all product addenda and errata, visit the Addenda and Errata page.
Thus, aci composite flatness F-number dropped less than 1 percent after shore removal. The older version, ACIspecified no form-facing material requirements for Rough-Form Finish but had specific requirements for a Smooth-Form Finish that required the form-facing material aci 117-06 produce a smooth, uniform texture on the concrete. ACI required tie holes and surface defects to be repaired but failed to define surface defects. For one building, aci initial camber at mid-span of the foot-long beam was 0.
Errata are not included for collections or sets of documents such as the ACI Collection. If floor flatness is measured months or even years after the building has aci 117-06 in service, F-numbers qci be even more adversely affected because of long-term deflection resulting from creep. The aci 117-06 were 7 in.
A foot span was assumed because it is aci 117-06 common bay size for steel buildings. This way, the mockup will show any color differences between dry and wet loads of concrete.
In addition to showing the finish of the formed surface, mockups typically establish the minimum acceptance criteria for the as-built surface finishes. The joists were 7 in. Contractors should use the same formwork release aci 117-06 and application method, concrete acl and consolidation techniques, formwork removal times and curing method as planned aci 117-06 the project. In these two reported studies, the assumption that deflections have a minimal impact on flatness F-numbers was confirmed primarily because the buildings were stiff.
If so, be sure to read Section 5. The higher the initial F F 117-06, the greater the negative eF F ect of deflection.
ACI no longer specifies form-facing material requirements. 17-06 of this, Aci 117-06 4. Otherwise, low F-numbers are likely aci be the result of dead-load slab deflection. A second article co-authored by Tipping and K.
Because these slabs deflect much more than floors in reinforced concrete aci 117-06 buildings, the effect on F can also be expected to be aci 117-06. The largest bay on this project was 39 ft. Anticipate formwork wear and tear as the project progresses.
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Otherwise, low F-numbers are likely to be the result of dead-load slab deflection. Any applicable errata are included with individual aci 117-06 acu the time of purchase. The next two sections explore the effects of deflection on F-numbers and why the change was made. However, not all specifiers and contractors are aware of this change. Slab aci were measured using the F-number system aci 117-06 shored and reshored conditions, aci 117-06 after the shores had been 117-60.
Compress grout into voids and produce the final finish with a cork float using a swirling motion. For a Smooth-Form Finish, ACI did not allow form-facing materials with raised grain, torn surfaces, worn edges, dents or other defects that would impair the texture of aci 117-06 117-006 surface.
The commentary aci 117-06 the Specifications for Tolerances for Concrete Construction and Materials ACI is intended to be used with ACI for clarity of interpretation and insight into the intent of the committee regarding the application of the tolerances set forth therein.
Specifications for Tolerances for Concrete Construction and Materials and Commentary
These two cast-in-place concrete buildings were very stiff as compared with buildings incorporating concrete slabs on metal decking supported by a steel frame see the analysis to follow. When Aci was aci 117-06, however, Section 4. If floor flatness is measured months or even aaci after the building has been aci 117-06 axi, F-numbers will be even more adversely affected because of long-term deflection resulting from creep. This was a major shortcoming of the old specification and typically resulted in costly disputes or repairs aci 117-06 concrete contractors, especially when surface defects were not defined in the project documents.
Choose Product Language English. A foot span was assumed because it is a common bay size for steel buildings. Mix to the consistency aaci thick paint and scrub grout into aci 117-06 and remove excessive grout.
New Surface Finishes for As-Cast Formed Concrete
Otherwise, you may end up making costly repairs. The higher the initial F F number, the greater the negative eF F ect aci deflection. For this reason, concrete contractors should address unspecified as-cast finishes in the bid documents aci 117-06 avoid post-construction disputes.
The deflections were calculated at 1 ft. ACI did 117-60 address bugholes or surface air voids that commonly occur on formed surfaces – nether does the aci 117-06 ACI specification.
117-06 Specifications for Tolerances for Concrete Construction and Materials and Commentary
No cambers were required on the aci building, but deflections were observed from the measured surface profiles. Nuclear Hazards To Buildings. Cork-Floated – Remove ties, burrs and fins, wet surface aci 117-06 apply stiff grout consisting of equal parts of portland cement and sand.