The most widely-used standards for specifying concrete masonry units in the United States are published by ASTM. International. These ASTM standards. (ASTM C 1, 1, Concrete brick. (ASTM C 55). 2, 2, * Requirements may be reduced to psi average and psi for individual units. Find the most up-to-date version of ASTM C at Engineering

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An ice pick or awl can be used to probe the wood and somewhat determine the extent of damage.

Product Detail – ASTM-C145-85

Our assessment of the attitude of the OMHC during the hearing was that it favored the rule change. Both photos show that the anchor is bolted solidly to the foundation and both are wider than the beam flanges. Both photos show that the anchor is bolted to the foundation and both are wider than the beam flanges. In this installation, the rebar attaching the foundation beam to the footer orange arrow would not constrain movement of the foundation beam and would therefore not be an acceptable anchor.

Other acceptable means for supporting the ends of the structural beams that I have found were pilasters built into the foundation walls, steel columns or foundation beams.

Keep in mind that if the OMHC agreement does not contain all of the various installation elements, be sure to write addenda that include elements not listed. If the c14 fans in the home do not have adequate makeup air, they will either not move as much air as designed or makeup asgm will come from wherever it can, which might be from undesirable places, such as through flues or chimneys.


A similar rebar anchor is on the other side of the beam to prevent the beam from moving sideways on the pilaster.

ASTM C – 85 Specification for Solid Load-Bearing Concrete Masonry Units (Withdrawn )

Results of the apparent strengths between strengths on the two perpendicular surfaces on the two perpendicular surfaces of the blocks was examined using individual slope for each block indicate that they are not part of the block strength type, single slope and pooled slope. For this installation, the installer only tack-welded the ends of the rebar to the beam and the rebar pulled loose in several places. However, most manufactured and on-frame modular homes with perimeter foundation systems are supported on H or I-beams that are in turn supported on the perimeter foundation system.

I have tried to be as thorough as possible in writing this article; however, I have likely missed some important points. As stated previously, poured concrete foundations offer additional anchoring options as shown in the following photos: Areas like these were found all along the exterior walls of this crawlspace foundation. Furthermore, only the very end of the rebar is welded, which could allow the rebar to break loose if the beam moved.

Basements and crawlspaces could have either gravel or concrete slab floors; but all should have footings installed under the center support columns or piers. No distinction was Other manufacturers have slight variations. In the absence of installation instructions, installers should follow local building codes requirements for fastening the beams together.

The agreement is to clarify the duties and responsibilities of the homeowner and the installer. The installer built pockets in the block to constrain the foundation beams and then welded angle anchors to the beams that extended to the poured concrete foundation.


Previously, I mentioned a second general type of manufactured and modular home construction that is supported directly on the perimeter foundations without need for foundation beams. Example of a proper foundation beam anchor using angle iron that has been bolted to foundation and welded to the foundation beam. Additionally, if more than one installer is going to be hired for various parts of the installation, be sure to have an agreement with each of the installers.

Standard mm-cylinder specimens were prepared for control. C Ezeokonkwo and C. The following photos show examples of a variety of anchoring methods that I have found during inspections of manufactured homes with foundation beams. Example of one style of modular home that uses perimeter anchoring to aatm sole plate instead of foundation beams. Warning to those who glaze at the use of calculations, they are in here. Some PHSs now come with their own humidistats.

The level of newly set homes and tightness of its piers should also be checked after asgm six months and a year because the slab or footings could have settled.

I see them often in the homes I inspect; but I suspect that most do not work as intended. Therefore, if soil is going to be used to replace concrete, the soil conditions must be controlled. Please be sure to contact us with questions or comments or to request a PDF version of this article.

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