9.19.1.2. Vent Requirements - Flat Roofs

 9.19.1.2. Vent Requirements - Flat Roofs

#Purlins at least 38 × 38 mm (2 × 2 in. nominal) are required to vent flat roofs where the #joist spaces are not individually vented to permit the venting of all spaces (Figure 9.19.-4).

Quoted from Illustrated Users' Guide - NBC2015

#flatroof

9.19.1.2. Vent Requirements

 9.19.1.2. Vent Requirements 

This Article requires sufficient #vent area to transfer to the exterior any #moisture that may collect in roof spaces before it can create problems. Vents not only reduce the amount of winter moisture accumulation, but also allow the roof or #attic space to dry out more quickly in the spring when the temperature rises to a level that might initiate wood decay. In low-sloped roofs, the roof #sheathing is closer to the source of moisture leakage from the space below, and #condensation and frost build-up can occur before the moisture escapes through the roof vents. Therefore, greater vent area is required for such roofs, both to reduce moisture build-up and to hasten subsequent spring drying. 

The distribution of vents on opposite sides of a roof is intended to encourage #cross-ventilation, while top and bottom distribution is intended to take advantage of convection currents to move heated air to the highest part of the roof to escape. If there is no common #attic space (e.g., flat roofs, cathedral ceilings) and there is no interconnection between joist spaces, the only way the roof can be effectively vented is by venting each #joist space. If the vents allow the entry of snow or rainwater, this will add to the moisture load and the risk of problems previously noted.

Quoted from Illustrated Users' Guide --NBC2015

#roofspace #roofvent #crossventilation

9.19.1.1. Required Venting

 9.19.1.1. Required Venting 

This Article requires that roof #venting provide a means for allowing #moisture that may have found its way into an #attic or roof space to escape to the exterior. Excess moisture resulting from winter #condensation can raise the moisture level in such spaces to the point where wood can begin to decay. Water leakage into the conditioned space below may also occur when the winter #frost and #ice build-up melts.

Quoted from Illustrated Users' Guide -- NBC2015

9.15.4.10. Interior Masonry Walls

 9.15.4.10. Interior Masonry Walls

This Article points to the requirements in NBC Section 9.20. for interior masonry walls acting as foundation# walls so that they are constructed to have adequate strength to support anticipated loads. 

The minimum #width for an interior loadbearing masonry# wall depends on the spacing of its lateral support. Such walls must be laterally supported by floor or roof construction, or by intersecting masonry walls or #buttresses. The maximum spacing of such supports can be no greater than 20 times the wall thickness, as illustrated in Figure 9.15.-18 (NBC Article 9.20.10.1.).

#masonrywall #loadbearing #lateralsupport

Quoted from Illustrated Users' Guide-NBC2015

How are plans reviewed? -- #23

 How are plans reviewed? -- #23

Important definition: Secondary Suite

Secondary suite means a self-contained dwelling unit located in a building or portion of a building of only residential occupancy that contains only one other dwelling unit and common spaces, and where both dwelling units constitute a single real estate entity.

#secondarysuite #dwellingunits

Guidelines for Effectively Engaging a Building Code Consultant

 Guidelines for Effectively Engaging a Building Code Consultant

When contemplating the engagement of Building Code Consultants, it is crucial to examine their LinkedIn profiles to verify that they possess the necessary qualifications and experience, unless we are prepared to provide them training through our projects.

Consider the following scenarios:

If we were to hire a #physician to safeguard our health, but this "physician" has never attended medical school or treated a patient in a #clinical setting, the consequences could be dire.

If we were to engage a #structural engineer to design a #skyscraper, yet this "structural engineer" lacks knowledge of structural mechanics and has no prior experience in an architectural firm, the building could potentially collapse.

If we were to select a building code consultant to aid in our building permit application, but this "consultant" has never enforced Building Code within a municipality, our application process may become increasingly complicated.

Many challenges we encounter today may stem from our initial hiring decisions. #hiring #design #training #experience #buildingcodeconsultant #linkedin.

Test to architects and plans examiners

 Test to architects and plans examiners

Evaluate the architectural design for the carport attached to the existing garage depicted in this image. What issues can be identified with this addition?

#carport #gagage #addition #architect #plansexaminer

How are plans reviewed? -- #22

 How are plans reviewed? -- #22

Converting a single-family house into a daycare facility is a complex undertaking that cannot be accomplished solely by an architectural designer. It requires the involvement of an architect, a structural engineer, a mechanical engineer, and an electrical engineer. Crucially, the expertise of a building code consultant, well-versed in the relevant codes, is invaluable for ensuring compliance and achieving cost savings. In a recent project, I successfully saved the building owner approximately $50,000 by retaining the existing structure and providing appropriate fire separations.

#singlefamilyhouse #daycare #buildingcodeconsultant #fireseparation

9.15.4.9. Crack Control Joints

 9.15.4.9. Crack Control Joints

This Article sets minimum distances for the location of joints in foundation walls designed to reduce #cracks so that the entry of soil drainage #water and #moisture can be minimized.

Both cast-in-place #concrete and concrete block shrink over time as a result of curing and drying. To control #shrinkage cracking, concrete block masonry units are either steam cured or autoclaved by the producer, and are required to satisfy permissible limits on linear drying shrinkage. Even so, some shrinkage may be expected for both cast-in-place concrete and concrete masonry #foundation walls.

Crack control joints may be necessary to accommodate this shrinkage. These joints are designed to move apart slightly as the wall shrinks, while maintaining a watertight surface. These are required to be installed not more than 15 m (45 ft.) apart when the foundation walls are longer than 25 m (75 ft.). Figure 9.15.-17 illustrates the requirements for crack control joints in foundations and two approaches for sealing the joints.

Where possible, crack control joints should be placed adjacent to a #window opening, where the concentration of tensile stresses encourages shrinkage cracks to occur.

Quoted from Illustrated Users' Guide - NBC2015

#crackcontroljoints #foundationwall #castinplaceconcrete #tensilestress

9.15.4.7. Reduction in Thickness

 9.15.4.7. Reduction in Thickness

1) Where the top of a foundation wall is reduced in #thickness to permit the

installation of floor #joists, the reduced section shall be not more than 350 mm high and not less than 90 mm thick.

2) Where the top of a #foundation wall is reduced in thickness to permit the

installation of a masonry exterior facing, the reduced section shall be

a) not less than 90 mm thick, and

b) tied to the facing material with metal ties conforming to Sentence 9.20.9.4.(3) spaced not more than

i) 200 mm o.c. vertically, and

ii) 900 mm o.c. horizontally.

3) The space between wall and facing described in Sentence (2) shall be filled

with #mortar.

Quoted from NBC 2015

#foundationwall