Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Fwd: Re: Interior partitions and pre-mfg trusses

[Subject Prev][Subject Next][Thread Prev][Thread Next]
------ =_NextPart_000_01BC440A.3ABC1E20
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

Barry wrote:


Joe McCormick wrote:
>=20
> I agree completely with Dennis that the conventional framing section =
of the
> code is something that should go by the way of the dinasours.  At =
least in
> zones 3 and 4...too many things can go wrong, and they're all in the
> details!

Agreed, that the details are extremely hard to convey via the written
sections of the code. There are generalized details on construction
which often go a long way toward education (such as the toe nails issue
in the Blue Book commentary)

> I was talking to an engineer of veritable seniority over myself about =
home
> construction and pre-manufactured trusses resting on interior walls.  =
Of
> course, the code requires that a gap be left between the interior =
partition
> walls not designated as bearing walls and trusses for obvious reasons. =
 He
> told me that people simply didn't build homes that way.  They toe nail =
the
> trusses to the partition walls and omit the gaps.  My experience is =
that
> some inspectors let this simple item, which has major implications, =
slip
> by.  Contractors don't care that trusses have specific load paths and
> points of support!=20

To borrow from Frank Lew...where are the bodies??

I guess a case can be made for bending and tension of the bottom chord,
but how many have actually "done the numbers" to defend this position. I
personally, have not come across a distressed truss situation related to
this issue. Has anyone information to support this concern?

Snip'd remainder

Barry H. Welliver
wellive(--nospam--at)ibm.net

[Dennis S. Wish PE]   I have discussed this with a local truss =
manufacture that cleared the light on the issue to some degree. when the =
truss is manufactured, the location of bearing is reinforced with a =
vertical struct (chord) to the bearing wall. At non-bearing locations, =
the vertical struct is eliminated - allowing the truss bottom chord to =
deflect with the load and therefore not transfer gravity load from the =
upper chord down.=20
The bottom chord will, however, transfer ceiling load since it is =
generally designed for 10 psf dead load which transfers to the =
non-bearing wall unless a space is provided.=20
Assuming that the span of the truss is conventional (there goes that =
word again) and spans over quite a few interior partitions (bathrooms, =
bedrooms, hallways etc.) there is probably very little reaction =
transfered to each wall to be of concern at the slab.=20
I have yet to see a non-commercial builder provide a 1/2" gap at the top =
of a non-bearing partition below a residential truss. Yet, I don't see =
this as a real big issue either.

Dennis Wish PE
 
------ =_NextPart_000_01BC440A.3ABC1E20
Content-Type: application/ms-tnef
Content-Transfer-Encoding: base64

eJ8+IhIRAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAA5AQAAAAAAADoAAEIgAcAGAAAAElQTS5NaWNy
b3NvZnQgTWFpbC5Ob3RlADEIAQ2ABAACAAAAAgACAAEEkAYAgAEAAAEAAAAQAAAAAwAAMAIAAAAL
AA8OAAAAAAIB/w8BAAAAPQAAAAAAAACBKx+kvqMQGZ1uAN0BD1QCAAAAAHNlYW9jQHNlYW9jLm9y
ZwBTTVRQAHNlYW9jQHNlYW9jLm9yZwAAAAAeAAIwAQAAAAUAAABTTVRQAAAAAB4AAzABAAAAEAAA
AHNlYW9jQHNlYW9jLm9yZwADABUMAQAAAAMA/g8GAAAAHgABMAEAAAASAAAAJ3NlYW9jQHNlYW9j
Lm9yZycAAAACAQswAQAAABUAAABTTVRQOlNFQU9DQFNFQU9DLk9SRwAAAAADAAA5AAAAAAsAQDoB
AAAAHgD2XwEAAAAQAAAAc2Vhb2NAc2Vhb2Mub3JnAAIB918BAAAAPQAAAAAAAACBKx+kvqMQGZ1u
AN0BD1QCAAAAAHNlYW9jQHNlYW9jLm9yZwBTTVRQAHNlYW9jQHNlYW9jLm9yZwAAAAADAP1fAQAA
AAMA/18AAAAAAgH2DwEAAAAEAAAAAAAAAvlIAQSAAQAsAAAAUkU6IEludGVyaW9yIHBhcnRpdGlv
bnMgYW5kIHByZS1tZmcgdHJ1c3NlcwAEEAEFgAMADgAAAM0HBAAHAA0ANwAjAAEARwEBIIADAA4A
AADNBwQABwANADEADQABACsBAQmAAQAhAAAAOUY3M0M4NkQ0MkFGRDAxMTk0MUEyODc4MDFDMTAw
MDAA7gYBA5AGAHAKAAAhAAAACwACAAEAAAALACMAAAAAAAMAJgAAAAAACwApAAAAAAADAC4AAAAA
AAMANgAAAAAAQAA5AOCpPQqWQ7wBHgBwAAEAAAAsAAAAUkU6IEludGVyaW9yIHBhcnRpdGlvbnMg
YW5kIHByZS1tZmcgdHJ1c3NlcwACAXEAAQAAABYAAAABvEOWChxtyHOgr0IR0JQaKHgBwQAAAAAe
AB4MAQAAAAUAAABTTVRQAAAAAB4AHwwBAAAAEgAAAHdpc2hAY3liZXJnOHQuY29tAAAAAwAGEAyI
MF0DAAcQGwgAAB4ACBABAAAAZQAAAEJBUlJZV1JPVEU6Sk9FTUNDT1JNSUNLV1JPVEU6SUFHUkVF
Q09NUExFVEVMWVdJVEhERU5OSVNUSEFUVEhFQ09OVkVOVElPTkFMRlJBTUlOR1NFQ1RJT05PRlRI
RUNPREVJU1MAAAAAAgEJEAEAAABBBwAAPQcAALwLAABMWkZ12/LwL3cACgEDAfcgAqQD4wIAY4Jo
CsBzZXQwIAcTTQKAfQqACMggOwlvMsw1NQKACoF1YwBQCwMGYwBBC2BuZzEwMxIzC6YgQgrAcnkg
4ncDYHRlOgqiCoQKhOELMGxpMzYBQBOAAUAScBVCY3QVlEpvZQUF0GMIUHJtaWNrjRUrPgrjGaJJ
IGEJwpogBaBtC1APwGVsFRHgaXRoIEQJ8AMABCCdG7BhBUAbsBrCbnYJ8Kx0aQIgB0AgA1BhGLAd
E+AgD7AXoB1RIG9mrxySGWYFoAEAIBwhcwNwTQ/AaB3yHFNzaAhgbMBkIGdvIGIVEByiTHdhFRAe
tCBkC4Bh4yAQCHBzLiAP8AVAGyBvIvAFQAuBGXV6AiAHkTMlGnBuIVA0LiWAdG/fIYADgSGyHfEE
IGMDkSFxmxUxE+AsJSMcoXknCXD9GnBsAyALgB7aAQABkAMQ1HMhFZpBCcJkJ3AcV8cpdRpwKCFl
eHQJcAeAvxthD4EnsSGAHOMVEHYHMP8hxAUQAkAJ8BWUHjUEICJVux+SI1BUHLAoIighZwnw8wSQ
B0BpegmAK7cegRzh3SPgchLwHUIVlHcgYA9w/x6hLtEhYi4wCQAeASISJbA/IhAtQQmAEvAccB5y
KHP/EvAbwCLwHJMlsBhAHXAsAv8EAQpQFZQolBTACkEUwCXAnxjgGuEHgAIwCsB5KRWa7xpCIhAc
MQdAayBzNMEDoP0J8GcLgAngBcAesR0QLqH/AaAbIB4hAwAFsBugIjE9YfUl4HkPsGwewAGgCGAF
QD8hEAeAHxgy+CUjF1BlLekDgXVmANB0CHAx8TMR/wQQB5EJcCPgHfIegQuAFWCfBRAFsSIQKGAj
Qk9mHxgdIyFlKxIwREMRcXVpx0MhHEQuMGdhcCGQGEDnGyABgEfBdHcJ4RyTQ9f/CrEdQDNYGcBE
YzegFVApYf0AkGcdcBVgIVA3AUfQCsC/HfJKtCeTQrUCED0RYi4Q3whgQwIi8QCAI1FIHwclsMch
QQeAHERwZW8bER4gjwdwC1AVECLAZG4nSDH/RsAhQT/CHDUiESNRMME1cv83lB7aQqYtcRyiSadM
qQNw7xugHJNHkSNCTRUQLIBQoPkIgW5jH8McUhlmIBIkAf5zUKAXoAWwBCAbISYyH/H3USIfwRVg
bSdwM/QPgAQgvQDAagWxUSIYwDZDcydw+nMWsHAZZiGgI1EIUAIw+x3AWpRkAiBRwSawKCEcVP9C
tQ+AHRAeIFpxBpAYwDTxNmFBcRxwaEzzGWZwb7dD0S/TNrBwY8AAICEZ1X0VlFQhgQWwA2AH4ANS
IOpGHcBuGOBMB9AlgTPwnzDmHKIG4CLAB5A/PxWa/RpgZwpQBBEuMCawD7Amo/9H0QDAH7FN0kfQ
JUAd8ieT/wnwAJAeh2XRAkBmcQ9wBbD/KwAVlFHwP6IH4CXzYYNCIvsoURUQImABZ+RB8AbQBJD8
cyItYgEBa4FbJGPAAJD7HUIjUEkVlFhxTsFvsidw/2GDSxIa4W9SA2Bp0yLAMwH/acFCdlEBb5Ee
YwlwC2BLwt8lsBWUWzM4EyNQSDcBJgH/cCILgE3RAMAeYy1xZGVbJC8c4VjQBKBou1MDAHAnvyFQ
LLELcQSBFZoU1EgjUD5XG1AWsD1hM5V+5EBp+GJtLiTQF7UVlROCDDLrF1UP4Fsb5VN+sQQAG8Co
UEVdAzBiAUBpD+DvI2AaYGGDdWFjQsJxtRuTvzTiJrBUIXYjQdkcRGMjsedCYxyxFrBnaAVAehJI
4v84InozWgIBAAnCI1BnYTjU/3YUHCFB2kXkhiIeZkw2HCH/CXB5g1jQIVCFtT1hHUCGQvczBDaQ
bZMpVWZMOiNQI4H5SxBuLUw2jSZeARyij77fHCEbUAdwItFLwi0oQjWg/yB0i1ZtKnElGyCQgRuT
jOT/YoEnlQlwTdF0JF9xAIBxgP8FwAnAYZA+YmJjZlMcomRx9z0BmARgAHdykWVVbP0bgfcoYHPR
NaBlPWErEZsmWND/AxCTNGKBAJBYw5VDMWVRUv9LYzHxTdIUAEGAm1ApYWKBf2JjM/SbFlVXkrpE
Ypzwbv8bIGnTWmAA0B/DF1EuEAEA+mSeBkE4IR3jHFeoMWyX+4t3HOsomjMhYVKHmCIagP8LcZEQ
JTKq4i/RPrJGsRVgnzTRcYAH4EkfBjEoYmLB7wNgA3BeAUfQZLIVD4AoYOMiEZVxdGMukREw06iU
/7HQAmAt8QSQnAEusT3RTpH/HlSbFndjLHAA0BvAp1Mtcb9H0R6xe0UacKqFC2Bingb9hFV5WwJ6
URqxLjCSsjnTP47wBzFR5D0BqMU00TEv/jJxEEeSHHUlsEewHrG7ZP9MNlXoR9CWgTTRQyGpAR0x
+4ZWI1BZD8AncBpgYAS7Iv9bM3jiToK8UUuAiXWOoJoy/i4VmhvlgzUWoSTQFwojYAsVlBBxAMiw
AAAAAwAQEAAAAAADABEQAAAAAAMAgBD/////QAAHMCDDtCaVQ7wBQAAIMCDDtCaVQ7wBCwABgAgg
BgAAAAAAwAAAAAAAAEYAAAAAA4UAAAAAAAADAAOACCAGAAAAAADAAAAAAAAARgAAAAAQhQAAAAAA
AAMABoAIIAYAAAAAAMAAAAAAAABGAAAAAFKFAAC3DQAAHgAmgAggBgAAAAAAwAAAAAAAAEYAAAAA
VIUAAAEAAAAEAAAAOC4wAAMAJ4AIIAYAAAAAAMAAAAAAAABGAAAAAAGFAAAAAAAACwAwgAggBgAA
AAAAwAAAAAAAAEYAAAAADoUAAAAAAAADADGACCAGAAAAAADAAAAAAAAARgAAAAARhQAAAAAAAAMA
M4AIIAYAAAAAAMAAAAAAAABGAAAAABiFAAAAAAAAHgBCgAggBgAAAAAAwAAAAAAAAEYAAAAANoUA
AAEAAAABAAAAAAAAAB4AQ4AIIAYAAAAAAMAAAAAAAABGAAAAADeFAAABAAAAAQAAAAAAAAAeAESA
CCAGAAAAAADAAAAAAAAARgAAAAA4hQAAAQAAAAEAAAAAAAAAHgA9AAEAAAAFAAAAUkU6IAAAAAAD
AA00/TcAAO8G

------ =_NextPart_000_01BC440A.3ABC1E20--



--- Internet Message Header Follows ---
Received: from server1.seaoc.org (bqe.com [204.140.166.34])
	by host1.texramp.net (8.8.5/8.8.5) with SMTP id NAA03886
	for <rlewis(--nospam--at)techteam.org>; Tue, 8 Apr 1997 13:21:55 -0500 (CDT)
Received: from key.cyberg8t.com by server1.seaoc.org (NTList 3.02.10) id
ra016917; Tue, 8 Apr 1997 10:50:08 -0700
Received: from pdhost30.cyberg8t.com (pdhost30.cyberg8t.com [207.67.173.39])
by key.cyberg8t.com (8.8.5/8.6.12) with SMTP id KAA09452 for
<seaoc(--nospam--at)seaoc.org>; Tue, 8 Apr 1997 10:52:09 -0700 (PDT)
Received: by pdhost30.cyberg8t.com with Microsoft Mail
	id <01BC440A.3AB2F660(--nospam--at)pdhost30.cyberg8t.com>; Tue, 8 Apr 1997 10:47:18 -0700
Message-ID: <01BC440A.3AB2F660(--nospam--at)pdhost30.cyberg8t.com>
From: "Dennis S. Wish PE" <wish(--nospam--at)cyberg8t.com>
To: "'seaoc(--nospam--at)seaoc.org'" <seaoc(--nospam--at)seaoc.org>
Subject: RE: Interior partitions and pre-mfg trusses
Date: Mon, 7 Apr 1997 13:55:35 -0700
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="----
=_NextPart_000_01BC440A.3ABC1E20"
Reply-To: seaoc(--nospam--at)seaoc.org
Error-To: seaoc-ad(--nospam--at)seaoc.org
X-Loop: seaoc(--nospam--at)seaoc.org
X-Info: [SEAOC]
Owner: seaoc-ad(--nospam--at)seaoc.org
X-POP3-Rcpt: seaoc-ad(--nospam--at)seaoc.org
X-Sender: seaoc-ad(--nospam--at)seaoc.org
Precedence: list
X-ListMember: rlewis(--nospam--at)techteam.org [seaoc(--nospam--at)seaoc.org]


__________________________________________________

Richard Lewis, P.E.
Missionary TECH Team
rlewis(--nospam--at)techteam.org

The service mission like-minded Christian organizations
may turn to for technical assistance and know-how.