Module number 3 provides an on-line, self-paced training seminar on chapter 4, foundations and chapter 5, floors from the residential code of ohio.

Transcription

1 Module number 3 provides an on-line, self-paced training seminar on chapter 4, foundations and chapter 5, floors from the residential code of ohio. 1

2 This chapter sets forth the prescriptive requirements for constructing footings and walls for foundations of wood, masonry, concrete, and precast concrete. It addresses the control of surface water and subsurface drainage, soil tests and the prevention of moisture, decay and pests in basements and crawl spaces. 2

3 Surface drainage including stormwaters must be diverted away from the house and its foundations. 3

4 Surface drainage away from the home may be by sloping the grade, creating swales, installing drain piping or a combination. 4

5 The Residential Building Official may require a soils test any time questionable soils exist. 5

6 Three subsections have been introduced into chapter 4 in support of the new popularity of precast concrete foundations, including precast materials, precast panels and footings for precast panels. 6

7 This section establishes minimum specifications for the materials to be used in making precast concrete. 7

8 Anchors for the bottom plates may connect into precast concrete, poured-inplace concrete or concrete masonry unit with hollow cells when grouted. Anchors may not be placed into brick. 8

9 This code section provides guidelines for anchorage of wood plates and metal tracks to concrete and masonry. 9

10 Bottom plate anchors on the sole plates of interior walls that are bearing walls and are also braced wall panels must meet the prescribed code requirements. 10

11 This shows the setting of precast concrete foundation panels supported on a crushed stone footing. 11

12 This section prescribes the crushed stone footings that will support precast concrete foundations. 12

13 The use of gravel for footings for precast concrete foundations is prescribed in the code. 13

14 This code section provides technical provisions for the concrete and masonry foundation walls based on national standards. The insulated concrete forms (ICF s) have been included with conventional foundation wall provisions. 14

15 An example of poured concrete foundation wall after the forms are been removed. The new code provides additional requirements for anchor bolt spacing; floor joist attachments and blocking; and maximum aspect ratio for walkout basements. 15

16 Designs by a registered design professional must contain 7 specific items of information including design loads, soil bearing-capacity and basic wind speed. 16

17 Requirement added that precast concrete foundation walls shall be designed in accordance with accepted engineering practice. 17

18 These plans should detail the composition of the wall panel including insulation and finish materials and contain the required certificate of inspection label. 18

19 Precast concrete panel design drawings must be prepared by a registered design professional. 19

20 Example of precast concrete foundation wall design details. 20

21 Panel joint connections are to be detailed and include provisions for wiring and plumbing as well at the ability to fasten the facing or finish materials. 21

22 Precast foundations supported on crushed stone footing must have a foundation drainage system An example is on the next slide. 22

23 The drainage pipe must be installed a minimum of 1 foot beyond the edge of the wall to preserve the integrity of the effective bearing surface of the crushed stone footing. 23

24 Precast concrete basement foundations require panel joints to be filled and sealed and the exterior below-grade surface to be damp proofed to prevent water intrusion into the below grade space. 24

25 It is important that the joints be properly and completely filled using approved materials and that the dampproofing uses the same materials approved for cast-in-place concrete foundations. 25

26 Steel columns must be fabricated of not less than 3-inch diameter Schedule 40 steel pipe. The code continues to require that the bottom of the column be restrained from lateral displacement. 26

27 A reduction in the amount of prescribed ventilation cross-sectional opening when an approved vapor retarder covers the ground surface has been restored to this code section. 27

28 With an approved vapor retarder the amount of ventilation required is reduced to 10% of the original requirement. 28

29 This chapter sets forth the requirements for the design and construction of floor systems that will be capable of supporting minimum design loads including wood floor framing, wood floors on grade, steel floor framing, and concrete slabs on grade. 29

30 Prescriptive methods for securely attaching a wood deck to the dwelling structure are provided in this section. Detailed section views follow this slide. 30

31 Note that the bolt connections have washer spacers, the type and size of the fasteners are specified and the spacing of the bolts or lag screws is provided. 31

32 Joists continue to be required to be restrained against lateral movement / rotation at their ends. See the following slide. 32

33 An exception permits engineered wood products to be supported laterally as recommended by their respective manufacturers. 33

34 Exceptions exist when an under-floor space does not contain fuel fired appliances; the space is protected by an automatic sprinkler system; the area is 80sf or less; or floor framing dimension lumber is 2x10 or greater. 34

35 The new standard for cold formed steel framing now permits building up to 3 stories. 35

36 AISI standard S230-07with the S2-08 supplement prescribes the specific details for cold formed steel framing 36

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