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Fallen Arches Kendal

Some residential designers and builders in Kendal have failed to recognize that all brick arches are structural masonry and must be designed according to structural principals.

Jonathan Lacey Joinery
01539 722279
Underhill
Kendal
 
D C Reid & Partners
01539 729494
Charnin House
Kendal
 
Mark Capstick
01539 738725
42 Serpentine Road
Kendal
 
P.l & E Slatter
01539 726270
13 Bolefoot
Kendal
 
G J Builders
01539 732996
9 Spital Park
Kendal
 
David Nevison
01539 721380
P O Box 161
Kendal
 
G R T Builders
01539 723577
56 Lound Rd
Kendal
 
R Gibson
01539 727066
31 Bleaswood Rd
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Burgess Roughton
01539 722204
4 Low Fellside
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Dave Sharpe
01539 726231
2 Silverdale Drive
Kendal
 

Fallen Arches

Provided By:

Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: October 1, 1995

By William G. Bailey

Abstract:

Some residential designers and builders have failed to recognize that all brick arches are structural masonry and must be designed according to structural principals.

Arch Types and Terms
The types of arches most commonly used in residential construction are: jack, segmental, semicircular, and parabolic. Arches typically are classified as "minor" or "major." Minor arches are used to span openings of up to 6 feet and support vertical loads of less than 1,000 pounds per lineal foot. Major arches are those that span more than 6 feet and can support vertical loads greater than 1,000 pounds per lineal foot.

Thrust Loads
Although they carry loads in compression, masonry arches impart horizontal thrust loads at each end or "skewback." The abutments at each side of an arch must be strong enough to resist these loads. Most problems occur in arches that frame into columns. In residential construction arches frame into a column that often consists of a 4x4-inch wood member. Brick are laid merely to enclose the wood column. Such hollow brick columns offer little or no resistance to thrust loads. Various methods can be used to resist thrust loads. When feasible, avoid framing arches into columns and instead place arched openings in walls. Alternatively, increase the strength of columns by increasing their cross section and adding reinforcing steel and grout.

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