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curtain-wall-construction

Curtain-wall projects require a variety of connectors that provide a load path from the curtain wall to the primary structure for wind, seismic and dead loads.

Innovative Solutions for Curtain-Wall Framing

<h1>Innovative Solutions for Curtain-Wall Framing</h1>
<div class="row">
  <div class="col-md-6">
	<p>
	  Simpson Strong-Tie has developed a line of connectors for use with
	  curtain-wall steel stud framing. Curtain-wall projects require a variety
	  of connectors that provide a load path from the curtain wall to the
	  primary structure for wind loads, seismic loads and dead loads. Slide-clip
	  connectors enable the structural building frame to deflect independently
	  of the curtain-wall system. Fixed-clip connectors support the dead load of
	  a curtain wall from the structural frame. Fixed clips have the added
	  benefit of providing connector solutions for load-bearing walls and for
	  roof systems utilizing steel trusses and rafters.
	</p>
	<p>
	  Our connectors for curtain-wall construction accommodate many different
	  bypass framing applications in a variety of stand-off conditions. We also
	  offer connectors for head-of wall and strut applications.
	</p>

	<h2>Tailored To Your Design</h2>

	<p>
	  Our standard slide clips accommodate either 3/4" or 1" of both upward and
	  downward movement, equivalent to an L/360 live-load deflection for a 30'
	  span. Our standard clips also accommodate stand-offs as large as 25". For
	  deflections greater than 1", or job-specific conditions, Simpson
	  Strong-Tie can provide
	  <a
		href="/coldformedsteelconnectors/specialorder_clipscfs/p/special-order-custom-clips-and-connectors"
		>custom clips</a
	  >
	  to suit most framing needs.
	</p>

	<h2>Complete, Tested Solutions</h2>

	<p>
	  Designers of curtain walls will often know the capacity of a connector,
	  but since the capacity does not take into account the way in which the
	  connector is anchored to the supporting structure, the designer must then
	  manually calculate this important aspect of the connection design. These
	  calculations are complicated by considerations of eccentric and prying
	  forces that often exist but are difficult to predict. Through
	  comprehensive testing Simpson Strong-Tie provides total, code-listed
	  connector solutions. Our testing extends from the capacity of the
	  connector and its attachment to the framing, to the anchorage of the
	  connector to the primary structure. By providing complete data on the
	  entire connection system, we save the designer time and ensure that all
	  forces, including eccentric and prying forces, are adequately considered.
	</p>
	<p>
	  As with all Simpson Strong-Tie products, our slide-clip and fixed-clip
	  connectors for curtain-wall steel stud framing carry our promise of
	  quality and performance, and are backed by prompt, knowledgeable service.
	</p>
  </div>
  <div class="col-md-6">
	<img
	  alt="Curtain Wall Framing Section"
	  src="https://embed.widencdn.net/img/ssttoolbox/7zxfzyns5l/700px@2x/Curtain-Wall_Framing_section.png"
	/>
  </div>
</div>

<h2>General Information and Notes for Curtain-Wall Framing Connectors</h2>
<p>
  Slide-clip and fixed-clip curtain-wall framing connectors represent key
  components that comprise a continuous load path between curtain-wall
  steel-stud framing and primary building structure.
</p>
<p>
  In light-frame cold-formed steel construction, primary building structures
  typically consist of structural steel or structural concrete base material.
  Hence, connectors for curtain-wall framing are designed to anchor to steel or
  concrete to resist tension and compression load, perpendicular to wall, due to
  wind pressure, shear load due to gravity weight of the CFS framing, and
  in-plane load, parallel to wall due to earthquake or high wind force.
</p>

<h3>General Notes</h3>
<ol>
  <li>
	Allowable loads are for use when utilizing the traditional Allowable Stress
	Design methodology.
	<a href="/contact">Contact Simpson Strong-Tie</a> for LRFD loads unless
	otherwise noted.
  </li>
  <li>
	Allowable loads may not be increased for wind or earthquake load.<br />
	Allowable loads are based on cold-formed steel members with a minimum yield
	strength, F<sub>y</sub>, of 33 ksi and tensile strength, F<sub>u</sub>, of
	45 ksi for 43 mils (18 ga.) and thinner, and a minimum yield strength of 50
	ksi and tensile strength of 65 ksi for 54 mils (16 ga.) and thicker.
	(U.O.N.)
  </li>
  <li>
	Clips do not replace lateral or stability bracing. Design of bracing is the
	responsibility of the designer.
  </li>
  <li>
	It is the responsibility of the Designer to veriF<sub>y</sub> the adequacy
	of the stud. Allowable loads are based on clips installed an adequate
	distance away from penetrations, notches, ends of studs and other conditions
	that may affect the clip performance.
  </li>
  <li>
	It is the responsibility of the designer to check the adequacy of the
	supporting structure for loads imposed by connectors.
  </li>
  <li>
	Industry studies show that hardened fasteners can experience performance
	problems in wet or corrosive environments. Accordingly, use these products
	in dry and non-corrosive environments only.
  </li>
</ol>

<h3>Anchorage to Structural Steel</h3>
<p>
  Anchor to structural steel using self-drilling screws, powder-actuated
  fasteners, or welding are based on installation in a minimum 3/16" thick
  structural steel with F<sub>y</sub> = 36 ksi. (U.O.N.)
</p>
<ol>
  <li>
	Allowable loads for #12&ndash;24 self-drilling screws are based on a minimum
	nominal shear strength, P<sub>ss</sub>, of 2,520 lb. and nominal tension
	strength, P<sub>ts</sub>, of 2,535 lb. It is the responsible of the designer
	to select the proper length fasteners based on installation need. Screw
	length must ensure fastener extends through the connection a minimum of
	three exposed threads.
  </li>
  <li>
	Allowable loads for Simpson Strong-Tie PDPAT-62KP powder-actuated "tophat"
	fasteners also apply to alternate fasteners with a minimum shank 0.157", a
	minimum head diameter of 0.300", a minimum allowable shear of 410 lb. and
	tension strength of 260 lb. for A36 steel, and a minimum allowable shear of
	420 lb. and tension strength of 305 lb. for A572 or A992 steel per ESR-2138.
	"Tophat" fasteners are recommended to ensure adequate clamping force and
	consistent installations.
  </li>
  <li>
	Allowable loads for welded connections require E70XX electrodes with a
	minimum throat size equal to the clip thickness. Welding shall be in
	compliance with AWS D1.3. Welding galvanized steel may produce harmful
	fumes; follow proper welding procedures and precautions.
  </li>
</ol>

<h3>Anchorage to Structural Concrete</h3>
<p>
  Anchor to concrete or masonry such as Titen&reg; 2 screws, Titen HD&reg; screw
  anchor, Strong-Bolt&reg; 2, or various type of epoxy for post installed are
  based on installation in concrete with a minimum f'<sub>c</sub> = 2,500 psi
  and a maximum f'<sub>c</sub> = 4,000 psi. Reference the current Anchoring and
  Fastening Systems for Concrete and Masonry catalog for more information.
</p>
<ol>
  <li>
	Allowable loads for Simpson Strong-Tie Titen 2 concrete and masonry screws
	also apply to alternate fasteners with a 1/4" diameter with hex head style,
	a minimum allowable shear of 300 lb. and tension strength of 415 lb. for
	concrete minimum f'<sub>c</sub> of 2,500. Titen 2 screws install easily in a
	predrilled hole and include a drill bit in each box.
  </li>
  <li>
	Titen HD is a heavy-duty screw anchor for use in cracked and uncracked
	concrete as well as uncracked masonry. Titen HD is available in 1/4", 3/8"
	and 1/2" diameter for anchorage used in curtain-wall framing connector.
  </li>
  <li>
	Strong-Bolt 2 is a wedge-type expansion anchor designed for optimal
	performance in cracked and uncracked concrete as well as uncracked masonry.
	Strong-Bolt 2 is available in 1/4", 3/8" and 1/2" diameter for anchorage.
  </li>
</ol>

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