{"id":941,"date":"2013-04-28T21:26:21","date_gmt":"2013-04-28T21:26:21","guid":{"rendered":"http:\/\/www.jayraskinarchitect.com\/?p=941"},"modified":"2013-05-20T20:30:39","modified_gmt":"2013-05-20T20:30:39","slug":"trinity-place-apartments-seismic-upgrade","status":"publish","type":"post","link":"https:\/\/www.jayraskinarchitect.com\/?p=941","title":{"rendered":"Trinity Place Apartments Seismic Upgrade"},"content":{"rendered":"
\"P1050711\"<\/a>
Street View ecolaarchitects<\/figcaption><\/figure>\n

I had the pleasure of touring the Trinity Place Apartments the other day with members of HPLO who had worked on the Resilient Masonry Buildings Roundtable.\u00a0 The owner of the Trinity Apartments is both an aficionado of Portland’s masonry apartment buildings and very committed to seismically upgrading them. Motivated not only to protect his tenants, he also wants to give the buildings a fighting chance to survive an earthquake.<\/p>\n

The Trinity Apartments were built in 1910 and are the work of Knighton and Root.\u00a0 Knighton was the architect of such buildings as the Oregon Supreme Court, the Governor Hotel, and Johnson Hall at UO, to name a few.\u00a0 The apartments are well built, with much of their historic detail intact.\u00a0 A courtyard building, it actually two buildings joined in the middle with separate stairs and elevators <\/em>on each side.\u00a0 The fact that they are built of unreinforced masonry puts them at particular risk in an earthquake, due to the brittleness of the brick walls.\u00a0 However, the steps taken of<\/span> in this project go a long way to mitigating these problems.\u00a0 The quality of construction is also a positive factor, as is the fact that the number and symmetry of interior walls also act to stabilize the building.<\/p>\n

\"P1050738\"<\/a>
New roofing and seismic bracing of parapet. ecola architects<\/figcaption><\/figure>\n

The seismic work on the Trinity Place apartments is being done in phases.\u00a0 The first phase was recently completed, and consisted of tying the floors and roof to the exterior walls.\u00a0 The roof and floors need to work as a diaphragm.\u00a0<\/del>This often requires adding plywood to create this effect.\u00a0 This was the case for the roof, <\/em> but the floor sheathing and wood flooring in this building were sufficiently well built to act as a diaphragm without additional sheathing.\u00a0\u00a0 The work entailed waiting for tenants to vacate apartments as well as vacating or displacing tenants so the work could be done.<\/p>\n

While the building is symmetrical, a plus for seismic resistance, the U-shaped courtyard does present some challenges.\u00a0 This will be the focus of the second phase where cores will be drilled\u00a0 in the center of the masonry walls every four feet and then filled with epoxy.\u00a0 The cores will be attached top and bottom and the wall put into compression so it will act as a single shear wall.\u00a0 An elegant solution for unreinforced masonry buildings which protects the interior finishes.\u00a0 This method was used for the recent restoration and seismic upgrade of the Portland Train Station.<\/p>\n

\"Courtyard<\/a>
Courtyard Detail ecolaarchitects<\/figcaption><\/figure>\n

The seismic upgrade of Portland’s masonry apartment buildings is important on a number of levels.\u00a0 They represent a particularly productive time period to create some of the most beautiful buildings in Portland. \u00a0The loss of this architectural and cultural heritage would take away part of what<\/p>\n

makes Portland, Portland. \u00a0 Another important reason to seismically upgrade these buildings is that they represent thousands of units that will be desperately needed following an earthquake.\u00a0 One of the keys to <\/del> successful recoveries from earthquakes and other natural disasters,<\/em> are intact dwellings, particularly multi-family units, which insure<\/del> that <\/del> the work force has a place to stay.<\/p>\n

\"P1050719\"<\/a>
Typical fireplace in units ecolaarchitects<\/figcaption><\/figure>\n

It should be noted that this seismic work is to bring the buildings up to current life\/safety code levels.\u00a0 This level of performance is based on people safely evacuating the building and not on whether the building is either reparable or useable following an earthquake. The owner is aware of this and is beginning to ask the question about performance and seeing what the up charge in cost could be. Builder owners and design professionals often don’t ask this question, but it is a critical one when considering how useful will be following an earthquake. Given that the expense opening up the walls and roof is already being done, larger or more strapping is just an incremental cost that could easily be worthwhile if insures useability.<\/p>\n","protected":false},"excerpt":{"rendered":"

I had the pleasure of touring the Trinity Place Apartments the other day with members of HPLO who had worked on the Resilient Masonry Buildings Roundtable.\u00a0 The owner of the Trinity Apartments is both an aficionado of Portland’s masonry apartment buildings and very committed to seismically upgrading them. Motivated not only to protect his tenants, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,10,18],"tags":[29,78,79,60,77],"class_list":["post-941","post","type-post","status-publish","format-standard","hentry","category-blog","category-portland","category-seismic","tag-hplo","tag-knighton-root","tag-resilient-buildings","tag-seismic-upgrade","tag-trinity-place-apartments"],"_links":{"self":[{"href":"https:\/\/www.jayraskinarchitect.com\/index.php?rest_route=\/wp\/v2\/posts\/941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jayraskinarchitect.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jayraskinarchitect.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jayraskinarchitect.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jayraskinarchitect.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=941"}],"version-history":[{"count":16,"href":"https:\/\/www.jayraskinarchitect.com\/index.php?rest_route=\/wp\/v2\/posts\/941\/revisions"}],"predecessor-version":[{"id":954,"href":"https:\/\/www.jayraskinarchitect.com\/index.php?rest_route=\/wp\/v2\/posts\/941\/revisions\/954"}],"wp:attachment":[{"href":"https:\/\/www.jayraskinarchitect.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jayraskinarchitect.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=941"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jayraskinarchitect.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}