7307 EVERGREEN WAY 2018-01-01 MF Import

The large showroom roof ie aupported by timber colu�s and a single bearing wall w•ith ehort returns at each end. The bearing wall provides some resistance to forces in the north-south direction, but there is almos[ no resietance to the toraional Porces produced, nor to east-west Forces. Apparently the contribution of the second floor oFfice structure to the eaet has been responsible for the ehowroom's still standing. 3.3 Recommendatione Strengthen [he roof atructure �ver the center bay by adding addi[ional membera to the existing beams en� add a struc[ural ridge beam imder the preaent nominal ridge beam. Add additional posts under each end of the n�W membera. Strengthen the vnulted ceiling by adding members to resist the arch thruste. This can be done tn several ways, either by adding a steel [ie rod at the north and aouth sides of the vault or by tieing the ends of the vault [o the glued laminated beam below to allo�; the beam to take the thruet. The choice of inethod will depend on which can be dane more economically, considering accese for the work and exact arrangement of the preaent atructure. In addition to the above, reinforce the supports of the lighting trough around the vaulted ceiling and pa[ch the ceiling at the cracke in each corner of the bav. inoboth [hetnorthrsoutheand eastTeesttditrectionsal Thiselsathehmostoex- tensive etructural work required in the entire building complex. Although there are several possible ways Co provide the required strenqth, none cen be accomplished without affecting the appearance of [lie building [o some degree. Theae possible solutions are discussed Uelow. 'Che choice of which solution to inpl.�ment should be made afeer considering the structural, financisl and esthetic advanta�es and disadvantages of each. That choice ia beyond the scope of this report. Cantilevered steel columns would provide lateral strength bv transmitting the force into the concrete basement walls. Six or eight steel tube coluvms apProximately six inches square would be installed adjacent r.o existing timber colu�s. These steel colu�s would extend through the floor and be bolted to the top and 'oottom of r.he basement c,�11:, They could be installed either inside or outside the building, but in[erior colu�s would be preferable £rom first cost and maintenance viewpoincs. Steel rod X-bracing ceuld be installed in a minimum of four windows. two in the front and one on each end wall of the b��ilding, 'Ihis bracing would have [o be locatad over concrete 6asement walls and tied tc tl�em, and aould of course be visible. The rods would be approxima[ely one inch in diameter. N.though detalled cost estimates caere not mada this solution uo��ld proUably be least expensive. Steel frames could be installed in the exterior c.�alls of [he north snd south sales offices. The frames c:ould consist of [hree ste�l pipe colunms and horiznntal and diugonal Lracing in each office. 1'Lav �;ot:l.d e7:ter.d frnm th� .-.00f [o the basement floor and could be ins[alled �:dciio�lc removtng rlic• urall finishes, hu; a+ould have to extend [hrough thc ftnor acd ceiling, �s ae[imated chat this solution i;ould be less expensive ehan the !, � j��'7 �:-�_� �. j �._"z..�