What is a ridge cap? Because ridge-cap shingles cover the peak of the roof, where two angles meet, they play a critical role in keeping rain and melting snow from leaking into the house. And because ridge-cap shingles are bent over the roof, they can deteriorate quicker than the rest of the roof surface.
How do you nail rafters to a ridge board? Start a toe nail on either side of the rafter at the end that attaches to the ridge board, which is the board set on edge that extends from end to end of the roof's peak. A toe nail is a nail driven at an angle such that it exits the wood through a surface perpendicular to the surface it entered.
What is a structural ridge? A structural ridge is, naturally enough, one that carries a structural load; i. If you think of a Cape, each triangular "slice" of the roof would be a pair of rafters meeting at the ridge, and the floor joists forming the bottom of the triangle.
What size ridge beam do I need to span 20 feet? How big of a beam do I need to span 20 feet? What is a ridge? A ridge is a long, narrow, elevated strip of land or any raised strip or band. A ridge is a line that rises above what it is attached to. Think of a ridge as a combination between rim and edge.
When a ridge board is used, the roof assembly requires continuous ties across the structure to be installed to prevent roof thrust from being applied to the walls that the rafters rest on.
These ties can be the ceiling joists themselves, or if no ceiling joists are provided, rafter ties must be installed. When the roof assembly is not tied together by continuous ties at the end of the rafters, a ridge beam is then required. A ridge beam does not fall into the prescriptive requirements of the code.
When a ridge beam is required, it must be designed by an engineer to carry the roof loads. The rafters, ties, and ridge board act somewhat like a truss but when the ties are removed, the ridge board cannot carry the roof load alone since it is not considered a structural load-bearing member. With no ties provided across the structure, the rafter thrust from the roof assembly can displace the supporting walls that the roof system rests on.
This is why a ridge beam would be required, to carry the roof loads and not displace the walls. Again a ridge beam must be designed by an engineer to ensure the size of it is adequate to support the loads it will carry.
When a ridge board is used, Section R This newer carport roof rafters had no ridge beam or ridge board installed. Would this be acceptable, is there any reason for concern?? It is lacking structure, collar ties, ceiling joists, rafter tie-downs, and who knows what else, poorly constructed. Low quality construction. Collar ties are only required when specified by the architect or engineer.
The same with hurricane clips tying rafters to top plates unless it was constructed during a time in which they were required by code. They do help tie the two slopes together at the peak; especially important with the lack of collar ties. Looks to me like it may have been built without a permit. Looks like a ridge vent was installed without the roof sheathing being cut to accommodate air flow.
During the right kind of weather event, that carport could turn into a parachute since wind can enter the roof structure. However there are no rafter to wall brackets…if it is newer, I would suspect to see them…as Scott said.
Neither of these says it has to be used, only that if it is used it needs to meet the given requirements, structural ridge excepted. Not code complaint to structural adequate.
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