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[SEAOC] Re: [SEAOC] Division 91 (Tilt-up) Anchor question[Subject Prev][Subject Next][Thread Prev][Thread Next]
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- Subject: [SEAOC] Re: [SEAOC] Division 91 (Tilt-up) Anchor question
- From: Amaloyan(--nospam--at)aol.com
- Date: Sat, 7 Dec 1996 00:59:33 -0500
Dear Dennis; I guess the Gods of plan check are at war. I do not have CAD drawings but if you send me your fax number I will send you some details. Lets start with the HD's. There is a interdepartmental memo dated July 26, 1995 that gives you specific allowable values for use of the HD in tilt-up buildings. The allowable value of HD2A is 885 #. So if you use two, then it will be 1770#. This value is fixed reguardless of the member size you are connecting. So if it is a 2x4 or 4x14 the value is 885#. I guess this is the value of the HD at 1/8" deflection and the length of the bolt in the member does not govern. Allowable Diaphragm values: Unless you can prove to them the actual nailing and thickness I know you can use max. 250 plf shear value. One option is to expose an area and justify that way. I would say do not bother and use the lower values and drag it 4 bays. In my opinion it is a better detail. After the EQ. the 1/8" deflection criteria has become the standard. So if you wish to use bent plates you have to calculate the deflection of the plate at designed load. The Handicap issue: Unfortunatley Title 24 gets triggered even if you are changing the lights in the space. While enforcing DIV. 88 it was the departments policy not the exception to enforce H.C. requirements. But you are the first person that I know that has this problem with DIV 91. I would suggest talking to the plan checker first and then if that does not work then with the supervisor. I do not know of any person yet doing H.C. complice while doing DIV 91 work. Also remeber the area of alteration must comply so in this case there is no alteration to the space unless you are doing more than seismic upgrade then there should not be an issue. You can also ask for exemption due to financial hardship and get a modification to the building code. I hope the information given will help you. P.S. If every thing fails regarding H.C. compliance then ask the plan checker which code section triggers this work and send it to me. Ara Maloyan P.E. Amaloyan(--nospam--at)aol.com ...
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