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Fallen Arches Ulverston

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

G W Waite
01229 582046
North Lonsdale Road
Ulverston
 
B & J Mulcaster
01229 583484
Sunnyside
Ulverston
 
Paver Print
01229 885006
Carp Lodge
Ulverston
 
Morecambe Tavern
01229 583663
Industry House
Ulverston
 
Cloudsdale M H
01229 582846
Barnwell Cottage
Ulverston
 
Guy Mccullough Building Service
01229 582474
Town House
Ulverston
 
Colin Mckenna
01229 580879
Meadowbank
Ulverston
 
A B J Builders
01229 585522
Ure Mill
Ulverston
 
Sawdust & Stitches
01229 582284
12 Union Street
Ulverston
 
I T Shaw Ltd
01229 581928
Low Mill Business Park
Ulverston
 

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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