Abstract: A method of attaching to at least one bearing beam of a building. A clip with a blocking tab is attached to the bearing beam, and a roof assembly with two pivotally attached frames is unfolded and lowered. Each frame has a blocking member, and the roof is lowered so that the blocking member contacts the blocking tab and restrains the roof assembly from unfolding further. A roof has two parallel bearing beams, clips attached to each bearing beams, and a roof assembly. Each clip has a ramp and a blocking tab. The roof assembly has two pivotally attached frames, and each frame has a rafter and a blocking member. Each rafter rests on a ramp, and each blocking member is attached to a blocking tab.

Abstract: A hand-held manipulative probe for automated liquid dispensers for dispensing reagents or diluting samples with reagent automatically in accord with a programmed local microprocessor or remote computer control which grips the flexible pipette tubing, provides remote hand control and provides dispenser status indication.

Abstract: A syringe valve and clamping mechanism for an automated liquid dispenser using a demountable precision metering syringe for automatically dispensing reagents or diluting samples with reagent.