I have a customer who wants to know what is the maximum height of wall he can pour at one time? Stated another way - what is the maximum drop for grout going down a wall?
The grouting height table occurs in two location in the TMS code. In the TMS 402-16 code it appears as Table 3.2.1 and in the TMS 602-16 specifications it appears as Table 6 (same table in both locations).
The table gives the allowable height than you can drop the grout down the wall based on whether the grout is a fine grout (sand only) or a course grout (contain pea rock) along with the clear dimensions of the net opening down through the wall that will be receiving grout.
The tables allow for grout to be dropped a maximum of 24' for both fine and course grout. Realistically, it is rare that walls are grouted at heights above 12' - 8" because of the need of substantial bracing for an un-grouted wall 24' in height. Also, typically there is a bond beam around the 12' level which makes it a natural location to grout the wall. The 6th Ed FBC, Building HVHZ Section 2122 simply references the TMS 402/602-16 code for grouting requirements and has no other specific requirements other than a maximum age of 1 1/2 hours after the addition of mix water.
I have included with this post a portion of the Masonry Association's Masonry Certification Workshop slides pertaining to Grouting.
Links to additional information:
MAF's Masonry Workshop Grouting Slides
Jerry Painter, FASTM
Don Beers, PE, GC
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