W6X13.5 1

[SweetDewMe]

Does anyone know the dimensions of a W6X13.5? Its a member in a roof truss in a really old building Im doing work on. I can't find it in the 7th, 8th or 9th editions of the AISC. Thanks in advance for any help you can provide.

 

[JKW05]

Could it be a W16x15.5? These were included in the AISC Steel Manual up thru the 7th edition, and replaced with the W6x15 in the 8th edition.

 

[SweetDewMe]

Well, the only way I'd really know is if I get in the roof and measure it. The drawings say W6X13.5, but it could be a typo.

 

[JAE]

I did a search on the pdf copy of my AISC Design Guide 15 (AISC Rehabilitation and Retrofit Guide) and only W6x15.5 came up. As far back as 1953 there were no 13.5 beams in the US anyway. Where is the building located?

 

[lkjh345]

AISC's 'Iron and Steel Beams 1873 to 1952' shows 12WF27 beams.

A=7.97"
d=11.96"
b=6.5"
web = .24"

 

[lkjh345]

Oppps. Sorry. it though you were looking for a WT section.

My bad.

 

[SweetDewMe]

The building is located in Ogden Utah. I believe it was built around 1970.

 

[lkjh345]

Could the typo be that it is a 'WT' member? Not a 'W' member? WT6x13.5? Then it would have been cut from the 12WF27.

If its the chord(s) of a truss, this might be possible.

Just throwing out ideas.

 

[msquared48]

IKJH345's comment seems most logical as I cannot find a W section of that size anywhere, but there is an "ST 6 WF 13.5" listed in the 1949 edition of the 5th edition of the AISC manual:

A = 3.98
d = 5.98
Wf = 6.5f = .400
t stem = .240
Ixx = 11.4
Sx = 2.39
rx = 1.69
yx = 1.21
Iyy = 8.3
Sy =2.55
ry = 1.44

The same member is listed in the 1956 printing of the fifth edition and the fourth revised printing of the 6th edition (1967), around the time you mentioned of the building's construction. All the material properties from this edition are the same as listed.




Mike McCann
McCann Engineering

 

[msquared48]

Sorry about that...should say:

...
Wf = 6.5
tf = .400
...

Mike McCann
McCann Engineering

 

[JKW05]

If you are doing an analysis and you have access to the truss to take measurements, I would recommend doing so. If you are just trying to determine approximate clearances within the truss, it is probably reasonable to assume the member is 6" deep.

 

[csd72]

SweetDewMe,

I would always recommend that you go to the site to check that what has been built matches what is on the drawings.

I had a renovation once with a full set of drawings from a reliable company. I assumed that they would be pretty accurate but when I got out on site there were so many differences that some areas had to be redesigned.

csd