SUPPoeT &AR. 



, _ft-E.Q,'p. 



I '/2" ^~/A" ^ <Z'~4-"L C 



STEEL- 



q R.e.<aD. 



<S"x(2"/l"TH]CK,WH/TE PlWE^ 



Dou&LAS Fir or Other. 



SoFT,STa.AISMTGH.A)MED 



Wood, Free From Kk/ots. 



Each Pauel To be Fastemed 

 To 5TEEL Bar With 2- VeV 

 5<(3/f"LQ. c/^RRJAG£ Bolts 



Metal Tags 



q R, E gl' D. 



Stamped a s Showm w/ith 

 appropriath a/um6er or 

 SyMBoi-. PA&TE^; To 

 Panels With 2Wails Each 



AJ^ 



ca&ue. or. CHAIW 



MOTE-. 

 ALU Hoj.es iM Steel 



5AR. To ae 7/i<z"^ 

 Moles iw Wooo Panels 

 To &£ 1/2 V 



PAIMTJXJS 



Steel Bar. To B£ 

 SulTAfeLV Paimted To 



PReVEKJT CoRROSIOJj. 



WoodPamels Must 

 Mot Be Paiwteo. 



VVeisHT or. AyjcHOR 



Tests to be Huwg Ver-Tjcaluy ]>i FAtR.LY 



DEEP V/AT ER. With Lower. Emd ABOUT 2' 

 From £>ottoivi. 



Pauels To Be MouwTe.0 ON 

 Support &ar iw Numer)cal Order, 

 /As SHowM, With Pamel Marked 

 "c" ;m cewter.. 



5TAKIDARD TE5T BOARD 

 For MAR.1ME BORER. • 

 IKJVESTIGATIOKJ 

 W.f.CLAPP LABORLATORIES 

 TYPE 2 



Tigure 12 

 IS 



