780 Cmr Minimum Thickness Of Loadbearing Walls

Sufficient readings for each load step shall be to the code official.

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Wash or bucket samples shall not be to the test.accepted. Vertical longitudinal joint between wythes of masonry or bwith mortar or grout. A mechanical device for anchors, wall ties and fasteners. A roof or floor vertical resisting elements. The vertical distsuch wall to the top of the wall. Where structural sheathing is used, each braced panel must be at least 48 inches in width. Structural sheathing and let-in bracing shall be located at each end or as near thereto as possible.

CHAPTER 18 FOUNDATIONS AND RETAINING WALLS This Chapter.. . Pages

First-floor braced wall panels are supported on doubled floor joists, continuous blocking or floor beams. The distance between bracing lines does not exceed twice the building width measured parallel to the braced wall line. Masonry stem walls shall be solid grouted. The center of vertical reinforcement in stem walls shall be located at the centerline of the wall. For concrete cast in removable forms that will not be exposed to the earth or weather, and for concrete cast in stay-in-place forms, minimum cover shall be 3/4 inch (19 mm).

Vertical and horizontal reinforcement shall be the longest lengths practical. In detached one- and two-family dwellings that are three stories or less in height and constructed with stud bearing walls, isolated plain concrete footings supporting columns or pedestals are permitted.

Exterior footings shall be placed not less than 12 inches (305 mm) below the undisturbed ground surface. Protection of freestanding accessory structures with an area of 400 square feet (37 m2) or less, of other than light-frame construction, with an eave height of 10 feet (3048 mm) or less shall not be required.

Decks not supported by a dwelling need not be provided with footings that extend below the frost line. Footings shall not bear on frozen soil unless the frozen condition is permanent. The top surface of footings shall be level. Bolts shall extend a minimum of 7 seven inches (178 mm) into concrete or grouted cells of concrete masonry units. A nut and washer shall be tightened on each anchor bolt. The maximum anchor bolt spacing shall be 4 feet (1219 mm) for buildings over two stories in height. In general, buildings below slopes shall be set a sufficient distance from the slope to provide protection from slope drainage, erosion and shallow failures.

Where a retaining wall is constructed at the toe of the slope, the height of the slope shall be measured from the top of the wall to the top of the slope.

Alternate setbacks and clearances are permitted, subject to the approval of the building official. Such an investigation shall include consideration of material, height of slope, slope gradient, load intensity and erosion characteristics of slope material. Reinforcing bars to be welded and welding procedure; 3. Provision for dimensional changes resulting from elastic deformation, creep, shrinkage, temperature and moisture. Liquefaction below a depth of 60 feet (18 m) from a program which will allow sufficient time for final grade need not be considered for level adequate consolidation of the material based on ground.

Floor waterproofing materials: approved methods or materials. Surface preparation of walls: (10 mm) of portland cement mortar. Prior to the application of waterproofing parging shall be coved at the footing. The reinforcing shall be placed in the top _ of the investigation. The ties shall be provided at a maximum acceptable. A properly operated tremie or stress in the steel reinforcement or the permanent pumping method shall be used. Effectively protect the steel surface from load. When driven to or penetrating into rock, the spacing the column and the centroid of the supporting shall be not less than 24 inches (610 mm).

Driving formula:or instability in the structure, nor cause any stresses 1. The maximum load capacity shall be overlying the bearing material shall belimited by the supporting capacity as obtained from discounted.bearing upon or embedment in bearing materials as 5.

The results of the load test can be applied to other bearing materials. In no case shall a load be changed in the data and analyses which justify such higher stresses. Measure rebound at zero load for a unless it is waived by the code official. Anchor bolts shall extend a minimum of seven inches (178 mm) into masonry or concrete. Where the existing slope is steeper than one printed instructions. Where the slope is steeper are permitted, subject to the approval of the than one unit vertical in one unit horizontal building official. Gravel shall be washed and well graded. Where an interior concrete slab is provided, the unbalanced backfill height shall be measured from the exterior finish ground level to the top of the interior concrete slab.d.

Where aninterior concrete slab is provided, the unbalanced backfill height shall be measured from the exterior finish groundlevel to the top of the interior concrete slab.

For crawl space construction, (12 192 mm) in clear span. Backfill material shall be free high. When reinforcing steel with a minimum yield strength of 60, 000 psi is used, the spacing of the reinforcement shall be increased to 1.5 times the spacing value in the table.b.

Unbalanced backfill height is the difference in height of the exterior and interior finished ground. Where an interiorconcrete slab is provided, the unbalanced back-fill height shall be measured from the exterior finished ground level to the top of the interior concrete slab.h.

When reinforcing steel with a minimum yield strength of 60, 000 psi is used, the spacing of the reinforcement in the shaded cells shall be increased 12 inches.b.

Where an interiorconcrete slab is provided, the unbalanced back-fill height shall be measured from the exterior finished ground levelto the top of the interior concrete slab.h.

Difference Between Shear Wall, Load Or Non Load Bearing Walls