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| Design Details |
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| Multi-Wythe Cavity Wall System |
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Lean, Green, Thermal - MACHINE
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| Multi-Wythe Generic Wall Design |
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| Single Wythe Generic Wall Design |
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| Single Wythe - Blok-Flash® System |
| BLOK-FLASH® is an embeddable flashing pan for exterior single wythe C.M.U. wall systems. It collects moisture that infiltrates the wall and flows down the vertical cores and diverts it to the exterior. BLOK-FLASH® is a single wythe CMU flashing system that is useful at all flashing/weep hole locations including base of wall, above door and window openings, above bond beams, in parapet walls, basements and any other locations where flashing is necessary. |
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Available in:
 8" CMU
10" CMU
12" CMU |
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 Product Data Sheet |
 MSDS |
 Installation Instructions |
 Leed Letter |
| NCMA Tek 5-15 |
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| Residential Masonry |
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"Guide to Inspecting Residential Brick Veneer" Version 2
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English Version |
Spanish Version |
 REVISED |
 REVISED |
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Brick Veneer/Metal Stud Cavity Wall Details
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Complete Set of Isometric Drawings & Details
Now Available for Metal Stud Application |
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| Technical Data |
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| Rebar Lap Splicing |
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Calculating correct rebar lap splicing to meet code...
The IBC 2006 adopted MSJC 2005 by reference; however they decided to keep the previous lap lengths of 48 bar diameters. ...that engineers may have the option of using MSJC 2005 for their design lap lengths. Depending on the f’m the lap lengths can be shorter particularly in the smaller bar sizes. ...Footnotes (1) & (2) represent comments in the IBC code. (1) instructs the engineer on additional lap requirements in areas of high stress, (2) addresses the requirements for epoxy coated rebar. Footnote (3) assumes the bars are spaced at least 8” on center if the bars are closer the table will need to be adjusted. All bars are centered in the wall, if the bars are designed off center the table will need to be adjusted. The f’m is a variable that may be changed to meet your project requirements. The IBC 2009 has adopted MSJC 2008 including the lap lengths. These laps match the MSJC 2005 requirements so the MSJC laps should be what we see in the future.
Below is a lap splice spreadsheet, provided by Kelly Walker of the Masonry Institute of Michigan, which has been updated for IBC 2006 as adopted in MBC 2006. Also below, are the MSJC 2005 laps.
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| Submitted by Kyle Lochonic |
With support from:
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| Locating CMU Control Joints (CJ's) |
Approximate spacing of Control Joints (CJ’s) for reinforced CMU...
Using the Empirical Method in NCMA TEK 10-2B, Table 1 calls for a length to height ratio of 1.5 not to exceed 25ft. This assumes you have wire every 16” o.c. The engineering method in NCMA TEK 10-3 has different ratios but still does not exceed 20 or 25 ft.
Kelly L.K. Walker
Architectural Services Director
Masonry Institute of Michigan, Inc.
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| Supporting Documents: |
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NCMA TEK 10-2C
Control Joints For Concrete Masonry
Walls - Empirical Method
Click here for Tek Note
www.ncma.org |
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NCMA TEK 10-3
Control Joints For Concrete Masonry
Walls- Alternative Engineered Method
Click here for Tek Note
www.ncma.org |
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| Locating Brick Expansion Joints (EJ's) |
What are the approximate spacing for Expansion Joints (EJ's) for a typical brick veneer application?
Please read the following supporting documents.
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BIA Tech Note 18A
Accommodating Expansion of Brickwork
Click here for Technical Note
www.gobrick.com |
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Brick Expansion Joints and
Wall Openings
By: J Gregg Borchelt, PE
Courtesy of The Story Pole
Click here for article |
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| CMU Wire Reinforcing |
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What is the best wire for Single Wythe CMU and for Multi-Wythe CMU Cavity Wall?
Contrary to popular belief, wire reinforcing today typically offers no structural stability. In fact, the primary purpose of wire reinforcement in modern masonry wall systems is simply to help resist CMU shrinkage cracking. Typically, vertical and bond beam rebar reinforcement serves to resist wind loading.
Truss wire is not recommended for use is reinforced CMU. Diagonal cross rods make it impossible to meet modern grouting standards referenced in the IBC and sub-referenced in ACI Building Code Requirements for Masonry Structures. Ladder wire with cross rods spaced 16 inches on center allows code required centering of rebar, freer flow of grout and promotes full embedment in mortar at every intersection where side and cross rods meet on the inner and outer CMU face-shell, resisting wall shrinkage.
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Is wire reinforcement with 3/16 inch diameter side rods or 3/16 inch diameter side and cross rods better than standard 9 gauge side and cross rods?
No, for the most part it is just the opposite. The primary purpose for wire in todays reinforced walls is to reduce CMU wall shrinkage. It is very difficult to surround 3/16 inch diameter wire with mortar when placed in 3/8 inch bed joints. This is especially evident when considering allowed tolerances for masonry units and joint sizes. Mortar better surrounds wire when utilizing 9 gauge flush welded side and cross rods, increasing resistance to shrinkage cracking. It is no surprise demand for truss wire has fallen significantly in the last decade. The market simply demands higher performance 9 gauge 16 inch core-clear ladder!
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| Cold and Hot Weather Construction
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BIA Tech Note 1
Cold and Hot Weather Construction
Click here for Technical Note
www.gobrick.com |
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NCMA TEK 3-1C
All Weather Concrete Masonry Construction
Click here for article
www.ncma.org |
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Cold Weather and Hot Jobs
Winter Protection Article
Click here for article
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MIOSHA Masonry Wall Bracing Standards
Click here for Masonry Institute of MI Wall Bracing Letter
Click here for State of MI Wall Bracing Standards
www.michigan.gov/mioshastandards |
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| Industry Promotion |
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| Cost Guide |
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| The 2008 Masonry Wall Cost Guide is intended to provide users with an in-place wall square footage cost for 145 wall assemblies for six cities in Michigan: Ann Arbor, Detroit, Flint, Grand Rapids, Lansing and Saginaw.
The 870 listed costs are provided as an aid to assist decision-makers in utilizing masonry economically.The figures represent total masonry cost including labor, material, overhead and profit. All masonry wall costs were based on a straight run wall with no openings. The cost will be greater when considering openings, corners, site conditions, material handling conditions and weather. Wall heights vary and were based on applicable design methodologies as noted.
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| Masonry Industry Articles |
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 The Story Pole
Following are articles written by the MASONPRO staff, published in MIM's publication The Story Pole. |
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Masonry Magazine
The following article is written by Kyle Lochonic & Jeff Snyder and is published in the Masonry Magazine. |
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These are Adobe Acrobat PDF Files. Your computer will need to have Adobe Acrobat installed to open them. This free program can be obtained by clicking the Acrobat icon |
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Details & Isometric Drawings
