The Use of AASHTO LRFD Bridge Design Specifications with Culverts
The Use of AASHTO LRFD Bridge Design Specifications with Culverts
The Use of AASHTO LRFD Bridge Design Specifications with Culverts
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Dynamic Load Allowance<br />
�� <strong>LRFD</strong> – Dynamic Load Allowance (3.6.2.2)<br />
��DLA ��DLA DLA = 0.33(1.0 - 0.125D 0.125DE) E)<br />
�� Standard – Impact Factor (3.8.2.3)<br />
��IM IM = 0 0.3 3 – 0’ 0’-0” 0” 0” to t 1’ 1’-0” 1’ 0” INCL INCL.<br />
��IM IM = 0.2 – 1’ 1’-1” 1” to 2’-0” 2’ 0” INCL.<br />
��IM IM = 0.1 – 2’ 2’-1” 1” to 2’-11” 2’ 11” INCL.
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