Arching Action in Walls Roanoke VA

As the name implies, arching action works for walls much the way a jack arch works over an opening. For arching to take place, the masonry wall must be locked tightly between a rigid structural system above and below the wall.

Townside Construction Co Inc
(540) 444-0555
608 S. Market St.
Salem, VA
 
Premium Steel Building Systems, Inc.
(540) 981-2483
1568 Granby Street, NE
Roanoke, VA
 
Structures Design/Build, LLC
(540) 774-4800
5104 Bernard Drive
Roanoke, VA
 
House of Doors
(540) 765-2173
1390-C Southside Dr
Salem, VA
 
ABSOLUTE INSULATION LLC
(540) 384-6800
8383 Arabian Lane
Catawba, VA
Services
Spray Foam Insulation
Membership Organizations
BBB, RRHBA,NRVHBA

Precision Home Improvements Inc.
(540) 314-7488
5615 Malvern Rd NW
Roanoke, VA
 
Bratton Masonry
(540) 597-3801
338 elm street
vinton, VA
 
Central Vacs Unlimited, Inc
(540) 334-2067
PO Box 238
Boones Mill, VA
Services
Central Vacuum Installation
Membership Organizations
Roanoke and National Home Builders Association

Serenity Construction
(540) 353-0952
sky lane
Blue Ridge, VA
 
Geopier Foundation Company
(540) 951-8076
1997 South Main Street
Blacksburg, VA

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Arching Action in Walls

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

I have heard that masonry walls can resist high wind loads by arching action. What is arching action and how does it help to strengthen masonry walls?

As the name implies, arching action works for walls much the way a jack arch works over an opening. For arching to take place, the masonry wall must be locked tightly between a rigid structural system above and below the wall. This can occur when masonry walls are infilled between floor slabs and the mortar is packed tightly between the top of the wall and the floor slab above. As the wall tries to deflect under wind loads, the ends of the wall attempt to rotate. Because the wall is locked between two structural systems, this rotation exerts tremendous compression forces in the masonry walls. Because masonry walls are strong in compression and weak in flexure, arching action can often provide more resistance to lateral loads than can flexural bond.Arching action adds significantly to the wall strength in many older masonry bearing walls. However, if the wall is locked tightly between rigid structural supports, no allowance is made for differential movement when the wall expands and the frame contracts. Such differential movement may be sufficient to crack the masonry or even dislodge it.

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