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COLD FORMED STEEL STRUCTURES

CONNECTIONS:

BLIND RIVETS & SHOT PINS

Prof. Viorel UNGUREANUStudent Cristian RĂDULESCU

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 Why and where we use he!

The applications of lind ri!ets and shot pinsre"ardin" cold for#ed steel structures co#e to #ind

 $hen $e thin% of &

'situations $here acces is li#ited to onl( one sideof the asse#l( 

'thin to thin fastenin"s )lind ri!ets*

'thin to thic% fastenin"s )shot pins*

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B"#nd r#$es Are #echanical fasteners installed inpre'drilled holes

The( can e #ade of alu#iniu# allo(s+ nic%el'copper allo(+caron steel+ stainless steel or copper allo(

Dia#eters can !ar( fro# ,.- ## to .- ## /ith usual len"hts fro# - ## to 01 ##

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H%wThe asic idea is

 2222222222222222222222222222222222222The( can e installed either #anuall(

or $ith an auto#atic ri!et tool

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des'r#(#%n

 

'%!!%n

  y(es

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Des#)n a'%rd#n) % SR*EN*+,,-*+*- 

'S3EARL4AD

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 'TENS54N L4AD6lind ri!ets are usuall( not used $hen $e ha!e traction+ althou"h certain !aluescan e otained e7peri#entall( or offered ( the producer

 

 All these rules appl( in the follo$in" ran"e

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E.a!("e a'%rd#n) % a/"e 01+SR EN +,,-*+*-

8 9or a ri!et $ith d:,##8 t:,.## S,01'; f u:0< N=##,8 and a resultin"8 e>:?##8 /e ha!e :> 7 0< 7 ,. 7 , =>.,1:>-@N=##,

8   0< 7 ? 7 , = )>., 7 >.,1* : 1,1< N=##,

8 e> ; >.1 7 d : 0.@ ##

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a("#'a#%ns

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Sh% (#ns* (neu!a#'a""y dr#$en (#ns

'The( use techniBues si#ilar to nail "uns for $ood

'are co##onl( used for nailin" pl($ood to steel

These fasteners are a!ailale $ith#echanical or electro'inc platin"+ orco'pol(#er coatin"s+ dependin" oncorrosion resistance reBuire#ents.

head dia#eters& ## to >

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Powder-actuated pins Are used to fasten C9S fra#in" #e#ers toconcrete or to hot'rolled steel.

3eaded or threaded dri!e pins area!ailale $ith %nurled shan%s toincrease holdin" po$er in structuralsteel.

9asteners loaded in tension #a( reBuire $ashers to pre!ent the fastener fro#pre#aturel( pullin" throu"h the sheetsteel.

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Des#)n a'%rd#n) % SR*EN*+,,-*+*-'S3EAR L4AD

'TENS54N L4AD

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ran)e %2 $a"#d#y

#n )enera"

#n ens#%n

hese $a"ues assu!e ha he washer has en%u)h r#)#d#y % (re$en # 2r%! /e#n) '%ns#dera/"y de2%r!ed %r (u""ed %$er he head %2 he 2asener

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E.a!("e a'%rd#n) % a/"e 01-SR EN +,,-*+*-

8 S,01'; f u:0< N=##,8 t:>.1## tsup:## d:-.1## d $ :##8   : 0., 7 0< 7 -.1 7 >.1 = >.,1:,-0 N=##,

  : .1 7 0< = >.,1:>?, N=##,

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a("#'a#%ns

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S(e'#2#' s#ua#%ns3r%%2s4 wa""s58 the "ross section distortion #a( e ne"lected if the fastenin" is

throu"h a flan"e s#aller or eBual to >1< ##

8 the pull'throu"h resistances should e reduced if the fasteners are notlocated centrall( in the trou"hs of the sheetin"

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Fa#"ure !%des

8 Due to tension

8 Due to shear

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Than6 y%u 2%r y%ur #!e and aen#%n7