unreinforced masonry buildings paul lepore

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Unreinforced Masonry Buildings Paul Lepore

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Page 1: Unreinforced Masonry Buildings Paul Lepore

Unreinforced Masonry BuildingsPaul Lepore

Page 2: Unreinforced Masonry Buildings Paul Lepore

How to Identify Unreinforced Masonry buildings (URM)

• Arch over window• Deep, recessed windows• High parapet walls• Tie plates• Lintel over window• King row every 5 – 7 bricks

Page 3: Unreinforced Masonry Buildings Paul Lepore

Hazards of URM buildings

• No rebar• No lime in mortar• Fire cut beams

Page 4: Unreinforced Masonry Buildings Paul Lepore

Arch over window

Page 5: Unreinforced Masonry Buildings Paul Lepore

Arch over window

Deep reset windows

Page 6: Unreinforced Masonry Buildings Paul Lepore

King RowEvery 5 – 7 rows

Bricks laid on end ←

Page 7: Unreinforced Masonry Buildings Paul Lepore

Lintel

Horizontal support over a window or door made of steel.

• Fails at 800 – 1200 dgrees• Only horizontal support for bricks

Page 8: Unreinforced Masonry Buildings Paul Lepore

Lintel ↑↑

Page 9: Unreinforced Masonry Buildings Paul Lepore

Lintel ↑↑

Page 10: Unreinforced Masonry Buildings Paul Lepore

Lintel ↑↑

Page 11: Unreinforced Masonry Buildings Paul Lepore

Tie plates

• Tie horizontal floor or ceiling joists to the wall.

• Indicated by “plates” on side of building• Plates often covered during building

retrofit

Page 12: Unreinforced Masonry Buildings Paul Lepore

Tie Plate

This is what you see↓

Attached to rafter or floor joist

Captain R. Grego

Page 13: Unreinforced Masonry Buildings Paul Lepore

Captain R. Grego

Page 14: Unreinforced Masonry Buildings Paul Lepore

Captain R. Grego

Page 15: Unreinforced Masonry Buildings Paul Lepore

Tie Plates↓ ↓ ↓

Page 16: Unreinforced Masonry Buildings Paul Lepore
Page 17: Unreinforced Masonry Buildings Paul Lepore
Page 18: Unreinforced Masonry Buildings Paul Lepore

No lime in mortar

↓↓

Page 19: Unreinforced Masonry Buildings Paul Lepore

URM Concrete Bondbeam

Captain R. Grego

Page 20: Unreinforced Masonry Buildings Paul Lepore

URM Wall Thickness

Window Sill

Seismic Upgrade

3 Wythe’s Thick approx 13”

Re-inforced Concrete Bondbeam

Captain R. Grego

Page 21: Unreinforced Masonry Buildings Paul Lepore
Page 22: Unreinforced Masonry Buildings Paul Lepore
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URM Building?URM Building?

URM?

Page 24: Unreinforced Masonry Buildings Paul Lepore

Imitation URMNo tie platesNo King rowToo new in appearanceSpace above window before arch ****

******

Page 25: Unreinforced Masonry Buildings Paul Lepore

Imitation URM•No King row•Too new