Hollow clay plate

The hollow clay slab (also called hourdis ) is an artificially produced brick made of fired clay . The designation and use of hollow clay panels is regulated in DIN 278 .

features

The hollow clay slab can be used in a variety of ways, ranging from installation in lightweight partition walls and in hourdis ceilings to plaster supports between rafters . They are seldom used to build tiled stoves or wall heating .

The hollow clay plate has a square shape and has hollow spaces in the longitudinal direction. The ends on both sides can be bevelled at a 60 ° angle. Due to the cavities in the plate, the brick has almost no sound and heat insulating properties.

The standard distinguishes between the following designations:

Short name	Usage	Usage examples
HD	H ohlziegel in D corners	Ceiling insert between ceiling beams or rafters
HV	H ohlziegel for V erbundtafeln	Precast walls
HW	H ohlziegel for W andtafeln	Precast walls
HT	H ohlziegel for light T partition walls	Partition walls without sound or thermal insulation requirements

Dimensions

Usual dimensions of hollow clay slabs and section through a wooden beam ceiling:

Width (mm]	Length [mm]	Thickness [mm]
250	500	40
	600	60
	700	70
	800	100
	900
	1000
	1100

swell

• Dipl.-Ing. Gunther Abt: Brick Lexicon, edition 2004, published by Ziegelforum e. V.